The best RV air conditioners for travel trailers in 2026 are the Dometic Brisk II 15K for most trailers, the RecPro 15K for low-draw off-grid cooling, and the Coleman Mach 15 if you want a heat pump with a long service-parts history. Whichever you pick, the roof cutout, duct layout, thermostat type and your shore power amperage decide whether it fits at all.
A travel trailer is a thin metal box with glass on two walls. When the sun hits it at a desert campground, the interior climbs fast and stays there, and no amount of fan circulation fixes that. The rooftop unit is the only piece of equipment that actually moves heat out of the trailer, and it is also the single largest electrical load you will ever switch on.
That combination is why trailer owners argue about rooftop air conditioners more than almost any other purchase. A unit that cools beautifully in a 30 foot trailer can be useless in a 24 footer, and a unit that works fine on a 50 amp site can trip the breaker on a 30 amp pedestal.
Our team compared ten of the strongest rooftop units currently listed for travel trailers, reading the spec sheets against what buyers report after a summer of real use. We weighed cooling capacity, heat pump capability, roof footprint, weight, running amps, thermostat compatibility and how loud the unit is at three in the morning.
Quick picks:
Everything below assumes a rooftop replacement for a travel trailer, not a portable unit. If you rent or your trailer never sees 30 amp shore power, read the electrical section carefully before you order anything.
Table of Contents
- Top 3 Picks for Best Travel Trailer Air Conditioners (October 2026)
- Best RV Air Conditioners for Travel Trailers in 2026
- 1. Dometic Brisk II 15K: The Best Overall Travel Trailer Replacement
- 2. Coleman Mach 15 15K: Best Rooftop Unit With a Heat Pump
- 3. Coleman Mach 3 Plus 13,500: Best Value for Smaller Travel Trailers
- 4. RecPro 15K Heat Pump: Best for Off-Grid and 30 Amp Setups
- 5. Furrion Chill Cube 18K: Best Variable Speed Unit for Long Boondocking Runs
- 6. RecPro 13.5K: Best Second Unit for Cooling the Back Bedroom
- 7. TOSOT 16K: Best for Cold Mornings and App-Controlled Cooling
- 8. Dometic FreshJet 3 15K: Best Modern Upgrade for Dometic-Equipped Trailers
- 9. Advent Air ACM135: Best Budget Replacement With a Two-Year Warranty
- 10. Dometic Penguin II 13,500: Best Low-Profile Fit for Low-Roof Trailers
- How to Choose an RV Air Conditioner for a Travel Trailer
- Frequently Asked Questions
- What is the best air conditioner for a travel trailer?
- How many amps does it take to run a 15000 BTU RV air conditioner?
- Is it better to oversize or undersize an RV AC unit?
- Which brand of RV air conditioner is the most reliable?
- What is the life expectancy of a Coleman Mach RV air conditioner?
- What AC brands should RV owners stay away from?
- Final Verdict: Our Best RV Air Conditioners for Travel Trailers in 2026
Top 3 Picks for Best Travel Trailer Air Conditioners (October 2026)
Dometic Brisk II 15K
- 15000 BTU cooling
- 74 pounds
- 15 inch tall
- Single-zone Dometic controls
RecPro RV 15K Heat Pump
- 15000 BTU cooling
- 4-season heat pump
- Low amp draw
- Remote and touch panel
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The Brisk II earns the top slot on evidence rather than novelty: it carries the largest review base in this group, and it is the unit most trailer owners plug straight into an existing Dometic control box. The RecPro 15K takes the top-rated slot because its 4.5 star average comes with genuine cooling results and an inverter-style low draw. The Coleman Mach 15 rounds out the trio as the safest long-term purchase with heat.
Best RV Air Conditioners for Travel Trailers in 2026
All ten units below are rooftop replacement or addition units sized for a travel trailer. Every listing here is an upper unit or a complete rooftop assembly, and each one needs its own control box, plenum or thermostat unless your trailer already has a compatible system.
| Product | Specifications | Action |
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Dometic Brisk II 15K
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Coleman Mach 15
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Coleman Mach 3 Plus
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RecPro 15K Heat Pump
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Furrion Chill Cube 18K
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RecPro 13.5K
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TOSOT 16K
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Dometic FreshJet 3
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Advent Air ACM135
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Dometic Penguin II
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Check Latest Price |
We earn from qualifying purchases. CERTAIN CONTENT THAT APPEARS ON THIS SITE COMES FROM AMAZON. THIS CONTENT IS PROVIDED 'AS IS' AND IS SUBJECT TO CHANGE OR REMOVAL AT ANY TIME.
1. Dometic Brisk II 15K: The Best Overall Travel Trailer Replacement
Dometic B59516.XX1C0 Brisk II Polar White Air Conditioner (15,000 BTU 410A)
- 15000 BTU cooling
- 74 lb unit weight
- 15 in tall
- SEER 13
- R-410A refrigerant
Pros
- Plugs into existing Dometic control boxes and thermostats
- Largest review base in this roundup at over 1000 reviews
- EPP foam housing trims weight and improves output
- Many owners finish the swap in under two hours
Cons
- Upper unit only - control box thermostat and harness sold separately
- Condenser coils can ice up and drip inside
- Several owners rate it louder than expected
- Some report cooling closer to a 13500 BTU unit in extreme heat
The Brisk II is the unit we would put in our own trailer. It is the most documented rooftop air conditioner in this roundup, with more than a thousand reviews behind it, and the pattern in those reviews is consistent: owners replacing a tired 13,500 BTU Dometic see a real drop in interior temperature, often quoting 10 to 15 degrees at the return vent.
What makes it the safest pick is fitment rather than raw output. If your trailer came with a Dometic upper unit and a Dometic control box, this is close to a plug-and-play swap. Buyers who have done it report unplugging the old unit, swapping the bolts and reconnecting, with several finishing the job in under two hours using hand tools.
The EPP foam housing is the quiet engineering story here. It replaces the older metal shroud with a lighter foam structure, and Dometic lists the unit at 74 pounds, which matters when you are lifting it onto a roof in summer heat. Cooling capacity is listed as 15,000 BTU with a SEER of 13 and R-410A refrigerant.
Owners on r/RVLiving describe the trade-off plainly when they compare this to a Coleman: the 15K Dometic is loud. One owner wrote that their Dometic will not blow the hat off your head, while another said they were tired of the loud unit running all night. Budget for that if the trailer is your bedroom.
Check this before you order the Brisk II
The Brisk II is a single-zone unit. It will not drive a multi-zone wall thermostat that controls a front and rear living area separately, and pairing it with one is the single most common reason owners return this unit.
Also confirm your existing control box is genuinely Dometic. The listing is an upper unit only, so the wiring harness, control box and thermostat are extra purchases unless your trailer already has compatible parts.
Who should skip the Brisk II
Skip it if your roof opening is under 14 inches square and cannot be trimmed, or if you need multi-zone control. If noise while you sleep is the deciding factor, look at the variable speed units further down this list instead.
Owners also report condenser icing on some installations, which shows up as condensate dripping inside the trailer. That tends to track with airflow rather than the compressor itself, so a clean filter and clear ducts solve most of it.
2. Coleman Mach 15 15K: Best Rooftop Unit With a Heat Pump
Coleman-Mach 08-0080 Mach 15 48204 Series Air Conditioner Upper Unit 48204C966-15,000, Arctic White
- 15000 BTU cooling
- 5600 BTU heating
- 90 lb unit weight
- Exterior shroud 13.8 in tall
Pros
- Fits the standard 14 inch by 14 inch rooftop opening
- 15 to 20 degree inlet temperature drop reported
- Two-piece shroud is easier to remove than older Mach shrouds
- Pre-installed roof gasket with crush indicators
Cons
- Upper unit only - control box plenum and brackets sold separately
- Several owners find it much louder than the listed 28 dB
- Some units freeze up even in warm weather
- Thin freight packaging has arrived with cracked shrouds
The Mach 15 is the recommendation we hear most often from owners who just want a decision made for them. It fits the standard 14 inch by 14 inch rooftop opening that most trailers from the last two decades already have, and it delivers 15,000 BTU of cooling with 5,600 BTU of heating output.
That heating number is delivered BTU from the heat strip, not furnace-grade output, but it is enough to take the edge off a spring morning and to let you leave the furnace off longer. On a travel trailer with a 12,000 BTU furnace, that matters across a season.
Fitment is the strongest argument. Coleman lists it as a drop-in for a standard 14 inch by 14 inch rooftop opening, and it also swaps for a Mach 3 unit, which means owners upgrading capacity do not have to touch the roof cutout. A 1/3 HP fan motor and a SEER of 14 put it ahead of the Dometic on paper efficiency.
Owners report a 15 to 20 degree drop in inlet air temperature during a run, and the split shroud is genuinely easier to remove than the single-piece shroud on older Mach units. The pre-installed roof gasket with crush indicators is a small detail that saves a frustrating afternoon.
What to check on a Mach 15 installation
Like most units in this roundup, this listing is the upper unit. The control box, plenum, brackets and hardware are separate, so budget for a second order unless your trailer already has them from the unit it is replacing.
The listed noise figure of 28 dB does not match what many owners hear. Treat it as a marketing number and judge the trailer, not the spec. On iRV2 the recurring advice is simply that the choice between 13,500 and 15,000 BTU comes down to trailer length.
Who should skip the Mach 15
Skip it if you need multi-zone control or a wall thermostat you already own. It is also the wrong call if you are chasing the lowest possible running amps, since it draws more than the inverter units here.
Skip it if your roof is already at payload. At 90 pounds it is one of the heavier units on this list, and travel trailer roof strength limits are real on older rigs.
One more practical note: shipping damage. Owners on several threads report cracked shrouds from a thin freight pallet. Inspect the shroud on arrival before you climb the roof.
3. Coleman Mach 3 Plus 13,500: Best Value for Smaller Travel Trailers
Coleman 48203C966 Mach 3+ A/C Unit
- 13500 BTU cooling
- 5600 BTU heat element
- 320 CFM airflow
- 13.1 amps at high cooling
Pros
- Fits the standard 14 inch by 14 inch rooftop opening
- Reliable simple design that outlasts trailer expectations
- Plug-and-play wiring for an existing interconnect set
- Saves several thousand dollars versus dealer-quoted work
Cons
- Older fan design is not as quiet as newer variable-speed units
- Printed instructions missing or misprinted in some shipments
- Thin freight pallet leads to dented units
- Some units arrived with loose internal parts
If your trailer is 24 to 28 feet and campground power is the plan, the Mach 3 Plus is the honest value answer. At 13,500 BTU it matches the sizing that most travel trailers of that length shipped with, so it is a straight capacity match rather than an upgrade that demands new wiring.
On iRV2, the sizing advice is consistent and unglamorous: 13,500 BTU is the travel trailer default, and 15,000 is the upgrade. For a trailer that already cooled acceptably with a 13,500, replacing like for like keeps your electrical load unchanged.
Spec sheet details worth noting: 320 CFM airflow, 13.1 amps at high cooling, a SEER of 13.1 and a rotary scroll compressor on R-410A. Those numbers describe a durable, uncomplicated machine, and the 13.1 amp high-cooling figure is why it works on a 30 amp pedestal more comfortably than most 15,000 BTU units.
The wiring story is the underrated part. Owners replacing a unit with an existing interconnect set report plug-and-play connections, which turns a two-day job into an afternoon. That drop-in ease, plus the 14 inch by 14 inch opening fit, is why this unit keeps selling years after it launched.
What to check before buying the Mach 3 Plus
Confirm the 14 inch by 14 inch rooftop opening and whether your trailer is ducted or non-ducted. This unit supports both layouts, but the interior plenum still has to be right for your ceiling assembly.
Check your roof payload too. The listing does not state a reliable weight for this unit, so measure or confirm before committing to an install.
Who should skip the Mach 3 Plus
Skip it in genuinely hot climates on a larger trailer. Multiple owners on forums describe undersized units that cannot keep up in direct summer heat, and 13,500 BTU has limits when the roof is absorbing 115 degree air.
Skip it if noise is your top concern. The fan design is older, and owners comparing it with newer inverter units consistently find it louder. This is a durability and value pick, not a quiet pick.
4. RecPro 15K Heat Pump: Best for Off-Grid and 30 Amp Setups
RecPro RV 15K Quiet AC Heat Pump Non-Ducted White 110-120V
- 15000 BTU cooling
- Integrated 4-season heat pump
- 112 lb unit weight
- 55 to 59 dB
Pros
- Highest average rating in this roundup at 4.5 stars
- Low amp draw suits off-grid solar and generator setups
- Integrated heat pump adds heat without firing the furnace
- Remote plus LED touch panel needs no thermostat wiring
- Works with ducted and non-ducted systems
Cons
- Fan keeps running after the compressor cycles which adds humidity
- Remote-only control with no wired thermostat hookup
- Remote needs a fairly direct line of sight
- Some owners find it only marginally quieter than a Coleman
The RecPro 15K is the highest-rated unit in this roundup at 4.5 stars, and the ratings line up with what owners describe. It is the pick for anyone whose trailer spends time away from a full-service pedestal, because the low amp draw is the whole point of the design.
An integrated 4-season heat pump means you get cooling and a supplemental heat mode from one upper unit, at 1500 watts and 115 volts. Owners running this on solar alone report it holding a comfortable interior for hours, which is not something the single-speed 15,000 BTU units manage.
The control scheme is the real trade. There is a wireless remote and an LED touch display, and it works with both ducted and non-ducted air distribution, but there is no conventional wired thermostat hookup. If you want a wall thermostat in the living area, this is not the unit.
Physical details: 112 pounds, 39.5 inches long by 25.5 inches wide by 13.5 inches tall, and it fits rooftop openings up to 14 inches square. The exterior shroud and interior plenum are both included, which is not true of most upper units on this list.
What to check on the RecPro 15K
Check your roof opening against the 14 inch square maximum and confirm whether your ceiling assembly is ducted or non-ducted. Both work, which is rare, but the plenum configuration still has to match.
Also plan where the remote lives. Because it needs a reasonably direct line of sight, a control panel mounted across the room is not going to be as convenient as a wall thermostat.
Who should skip the RecPro 15K
Skip it if you camp in humid regions. Owners there report that the fan keeps running after the compressor cycles, which returns moisture to the cabin and can undo the benefit of the cooling in dry climates.
Skip it if you are replacing a Dometic or Coleman and want to keep your existing controls. This unit is remote-controlled by design, so a swap means a control change as well as a unit change.
5. Furrion Chill Cube 18K: Best Variable Speed Unit for Long Boondocking Runs
Furrion Chill Cube 18K Ducted RV Air Conditioner, White, FACR18VSDA-PS-AM
- 18000 BTU cooling
- Variable speed compressor
- 72.4 lb unit weight
- R-32 refrigerant
Pros
- Variable speed compressor holds temperature without hard cycling
- Low draw - owners run it on solar and small generators
- Largest cooling capacity here at 18000 BTU
- Lightest rooftop unit in this group at 72.4 lb
- Remote control plus silent mode
Cons
- Air distribution box and remote sold separately so it will not run out of the box
- Does not control the RV furnace without a separate relay
- Cool mode does not dehumidify and indoor humidity climbs
- Some units shipped with compressor fan bolts missing
The Chill Cube is the unit we would shortlist if a trailer spends weeks off-grid. The variable speed compressor is the whole reason: instead of cycling on and off at full blast, it ramps and holds temperature, which is exactly the behaviour you want when every watt has to come from a solar array or a small generator.
At 18,000 BTU it is the highest cooling capacity in this roundup, and owners report it pulling a hot trailer interior down faster than any of the 15,000 BTU units. It also draws roughly 850 watts in owner testing, which is remarkable next to the 1,500 to 1,800 watt figures on conventional units.
Weight matters more than most spec sheets admit. At 72.4 pounds this is the lightest rooftop unit we listed, and an aerodynamic low-drag profile reduces towing fuel cost over a long season. That is a real, measurable advantage on a trailer already near its weight limit.
It runs on R-32 refrigerant, which is worth noting as the industry moves in that direction. The compressor is a rotary scroll and the installation is a straightforward bolt-on rooftop mount. Owners cite a silent mode and the remote as everyday conveniences rather than headline features.
Check this before ordering the Chill Cube
You have to buy the interior air distribution box separately, and the remote is a separate purchase too. Plan for both before the install day or you will have an upper unit that cannot do anything.
Confirm it is ducted. This model is a ducted configuration, and it does not control the RV furnace, so a heat-only wall thermostat needs a separate relay to trigger the furnace.
Who should skip the Chill Cube
Skip it in a damp climate. Owners report that cool mode does not dehumidify, so indoor humidity climbs toward outdoor levels. In the Southeast that can make the trailer feel worse even as the temperature drops.
Skip it if you need heating from the roof unit. It has no furnace control function and no heat pump, so it is a cooling appliance with excellent efficiency and nothing more.
6. RecPro 13.5K: Best Second Unit for Cooling the Back Bedroom
RecPro 13.5K Non-Ducted RV Air Conditioner, White, Cooling Only
- 13500 BTU cooling
- Cooling only
- 112 lb unit weight
- 59.7 dB rated noise
Pros
- 4.5 star average with a 79 percent five-star share
- Owners report roughly 20 dB quieter than the factory unit it replaced
- Low amp draw allows running alongside other appliances
- Installs in 30 minutes to two hours on a pre-wired opening
- Effective as a bedroom-only second unit
Cons
- Fan runs after the compressor cycles and adds humidity
- Remote only with no wired thermostat and needs line of sight
- Only modestly quieter than comparable Coleman units
- Cooling only with no supplemental heat function
Adding a second rooftop unit is a genuinely different project from replacing the first one, and this 13,500 BTU model is the most common way owners do it. One person runs it on a wall thermostat in the back bedroom while the front unit handles the living area.
It shares the RecPro platform with the 15K, so the same remote-only control scheme and the same humidity behaviour apply. At 1300 watts and 115 volts it is the least demanding of the RecPro units, and owners running solar report running it alongside other appliances.
The most useful piece of owner feedback here is comparative: buyers replacing a factory-installed Furrion report the RecPro running roughly 20 dB quieter. That is a direct before-and-after measurement rather than a spec sheet claim, and it is the reason this unit shows up in so many bedroom installs.
Fitment is straightforward. It fits rooftop openings of roughly 13.6 to 14 inches, works with ducted or non-ducted air distribution, and the exterior shroud and interior plenum are both in the box. Owners with pre-wired openings report finishing in 30 minutes to two hours.
What to verify before a second AC install
Verify your service capacity first. A second rooftop unit on a 30 amp service is the single most common mistake in this project, and forums repeatedly report that a 30 amp pedestal simply will not support two AC units plus a refrigerator and a battery charger.
Verify your wiring gauge as well. One Forest River owner on the Forest River forums reported burned wiring behind a 13,500 BTU unit because the trailer shipped with 14/3 instead of 12/3. That is a safety issue worth a look before anything else.
Who should skip the RecPro 13.5K
Skip it as a whole-trailer unit on a long rig. 13,500 BTU is adequate for a bedroom but undersized for a 30 footer with a sunlit slide-out.
Skip it if your trailer is ducted with a wall thermostat you want to reuse, and skip it if humidity is your main problem. It is cooling only with no heat function, and the fan continues running after the compressor stops.
7. TOSOT 16K: Best for Cold Mornings and App-Controlled Cooling
TOSOT 16000 BTU RV Air Conditioner, 43dB Ultra Quiet, White
- 16000 BTU cooling
- 12500 BTU heat pump
- 43 dB rated noise
- 131 lb unit weight
Pros
- Lowest published noise rating here at 43 dB
- 16000 BTU cooling with a 12500 BTU heat pump
- Operates from 23F to 115F ambient which is unusual for a rooftop unit
- WiFi and app control plus an included remote
- Hardware kit and step-by-step install guide with a 2 year warranty
Cons
- Heaviest unit here at 131 pounds which makes the lift the hard part
- Arrives in two separate boxes so the install waits on both
- Heat pump suits mild conditions rather than deep cold
- Cooling SEER of 8.5 is the weakest on this list
The TOSOT is the newest design language on this list and the least familiar name. It is also the only unit here rated to operate down to 23 degrees Fahrenheit ambient, which matters for anyone who leaves the trailer standing in a cold shoulder season and wants to bring it back up to temperature.
Its published 43 dB noise rating sits well below the 58 to 65 dB band that most of the units in this roundup are rated at. At 16,000 BTU cooling with a 12,500 BTU heat pump, it also has more heating capacity than anything else here, and it is WiFi-ready through an app.
The heat pump number deserves a caveat. A 12,500 BTU heat pump is for mild conditions, not a cold-weather furnace substitute, and TOSOT rates it for a 23F to 115F ambient range precisely because that is where the mode is intended to work. Deep cold still belongs to the furnace.
It is a non-ducted rooftop unit that fits standard 14.25 inch by 14.25 inch openings, with a 2 year warranty and ETL certification. TOSOT rates it for RVs from 16 to 24 feet, which covers pop-ups, Class B and Class C rigs as well as small travel trailers.
Check this before you order the TOSOT
Measure the rooftop opening and confirm it is 14.25 inches square. It is also the heaviest unit on this list at 131 pounds, so the lift onto the roof is the part of this install that needs a second person.
Note that it arrives in two boxes. Your install day depends on both showing up, so plan for the delay rather than discovering it with a ladder on the roof.
Who should skip the TOSOT
Skip it if cooling efficiency at the compressor matters more than noise. Its cooling SEER of 8.5 is the lowest figure on this list, so it will cycle harder for the same cooling output than a SEER 14 unit.
Skip it if your trailer is a full-time home in a cold climate. The heat pump is not a furnace, and a long summer season will not show the weakness.
8. Dometic FreshJet 3 15K: Best Modern Upgrade for Dometic-Equipped Trailers
Dometic FreshJet 3 RV Air Conditioner
- 15000 BTU cooling
- 73 lb unit weight
- 31.25 in long
- Backwards compatible with Dometic controls
Pros
- Plug-and-play upgrade for Brisk II and Briskaire 2 owners
- Quieter and moves more air than the Brisk II it replaces
- Roof gasket pre-glued to the base so no separate gasket
- 14 percent lighter than the previous Brisk II generation
Cons
- Interior air distribution box and thermostat not included
- Older Dometic analog panels will not trigger cooling without a changeover box
- Thin shipping packaging has led to broken shrouds and tabs
- Some owners report less cold air output than expected
If your trailer already carries a Brisk II or a Briskaire 2, the FreshJet 3 is the natural upgrade path. It is backward compatible with existing Dometic air returns and controls, which means the electrical side of the swap is largely solved before you climb the ladder.
The engineering changes are real rather than cosmetic. Dometic lists durable evaporator e-coils that need less refrigerant, a shroud with hidden screws and no ventilation holes, and a 14 percent weight reduction against the previous Brisk II generation. It weighs 73 pounds.
Owners consistently report it running quieter and moving more air than the Brisk II it replaces, at the same 15,000 BTU class of output. Listed noise is 58.5 dB, which is a genuine improvement over the Brisk II figure without making the trailer silent.
The catch is the control side. Some older Dometic analog control panels will not trigger cooling without a changeover box, and the interior air distribution box and thermostat are not included. Budget for both if your trailer is more than a few years old.
Check compatibility before buying the FreshJet 3
Identify your current Dometic control panel first. If it is an analog panel, you need a changeover box or the unit will sit there running its fan and never call for cooling.
Confirm the roof opening. At 31.25 inches long by 29.5 inches wide, it is a similar footprint to the Brisk II, but measure rather than assume when your trailer is an older model.
Who should skip the FreshJet 3
Skip it if you do not already run Dometic controls. Its backward compatibility is an advantage only if you are inside that ecosystem, and outside it you are buying a normal rooftop unit at normal installation cost.
Skip it if shipping damage is a dealbreaker for you. This unit carries the highest one-star share of anything in this roundup at 17 percent, and the complaints cluster around broken shrouds and mounting tabs arriving from thin packaging rather than around cooling performance.
9. Advent Air ACM135: Best Budget Replacement With a Two-Year Warranty
ASA Electronics ACM135 Advent Air 13,500 BTU Roof Top AC, White
- 13500 BTU cooling
- 68.4 lb unit weight
- 2 year parts and labor warranty
- Three fan speeds
Pros
- Exact plug-and-play replacement for older Dometic upper units
- Longest warranty listed here at 2 years parts and labor
- Lightest unit in this roundup at 68.4 lb with a rigid metal base pan
- Owners run it on a 3500 watt generator through desert heat
- Three fan speeds plus a washable filter
Cons
- Included mounting screws reported too short for some roof decks
- A minority of units never cooled properly and were returned
- Interior control box knobs can shake loose while towing
- Modest cooling for larger trailers
The Advent Air ACM135 has been a budget recommendation in RV forums for years, and the reason is simple: it is an exact plug-and-play replacement for older Dometic upper units that already have a control box. It installs in a standard 14.25 inch by 14.25 inch vent opening.
At 68.4 pounds it is the lightest rooftop unit in this roundup, which makes it the easiest to lift onto a roof solo. The rigid metal base pan and a thick watertight vent gasket with six dense foam support pads are more durable than they need to be for a budget unit.
It carries a two-year manufacturer parts and shop labor warranty, the longest coverage listed here. Owners running it on a 3,500 watt generator report it handling 115 degree desert heat through a full summer, which is a meaningful claim in Arizona and west Texas.
Three fan speeds and a washable filter give it more day-to-day adjustability than most budget units. Note that the heat function is an optional plug-in heat strip rather than an included heat pump, so plan that as a separate purchase if you want winter capability.
Check this before ordering the Advent Air
Check the mounting screw length against your roof deck. Owners report the included screws being too short on some decks, and that is a trivial fix before install and an annoying one halfway through.
Confirm your opening is 14.25 inches square and that your trailer is running a Dometic-style control box if you are replacing an older Dometic unit.
Who should skip the Advent Air
Skip it on a larger trailer or in extreme heat. 13,500 BTU is modest, and owners are candid that it struggles to cool anything bigger. It is a value replacement, not a capacity upgrade.
Skip it if you cannot tolerate a small return rate. A minority of units never cooled properly and had to be sent back, so buy from a seller who handles returns easily. The interior control box knobs also work loose over rough towing, which is a small but real annoyance.
10. Dometic Penguin II 13,500: Best Low-Profile Fit for Low-Roof Trailers
Dometic Penguin II High Efficiency, Low Profile Rooftop Air Conditioner, Ducted or Non-Ducted Application, 13.5K BTU, Polar White, Cool Only, No Pre-Installed Controls
- 13500 BTU cooling
- 9.5 in tall low profile
- 99 lb unit weight
- CCC2 or CT thermostats
Pros
- 9.5 inch profile noticeably reduces wind resistance while towing
- EPP foam housing trims weight and improves efficiency
- Rib-reinforced base pan holds up on rough roads
- Works with CCC2 or CT thermostats in single or multi-zone
- Direct swap for older Dometic units with four bolts
Cons
- Most expensive unit here while offering only 13500 BTU
- Hardware and controls not included
- Blower is noticeably noisy for the money
- Motor and fan mount on self-tapping screws that can back out and jam the fan
The Penguin II exists for one reason: roof clearance. At 9.5 inches tall it is the shortest unit in this roundup by a wide margin, and for a trailer with a low roof, a curved front cap or a fifth-wheel fairing, that is often the difference between a unit that fits and a unit that does not.
It is also the only unit here that works with CCC2 or CT thermostats in either single-zone or multi-zone configurations. If your trailer runs a multi-zone system, the Brisk II is off the table and the Penguin II is not.
On iRV2 the fit story is well documented. Owners report a 13,500 BTU Penguin dropping into an existing opening on a hot afternoon, which is the strongest evidence that a like-for-like replacement genuinely works when the roof layout cooperates.
The aerodynamic low-profile design reduces wind resistance while towing, and the EPP foam housing cuts weight while improving efficiency. It is rated at 1 sones and it works ducted or non-ducted.
Check this before ordering the Penguin II
Measure your roof cavity, not just the opening. The 9.5 inch profile solves the height problem, but you still need clearance above the base pan and room for the ductwork under the ceiling assembly.
Confirm your thermostat type. Compatibility with CCC2 and CT controllers in both single and multi-zone setups is the reason to choose this unit, so verify yours before you commit.
Who should skip the Penguin II
Skip it if you want more cooling. At 13,500 BTU in a hot climate, owners looking for capacity should look at the 15,000 BTU units instead. This model gives you fit, not output.
Skip it if noise and price both matter. Reviewers describe the blower as noticeably noisy for an off-the-shelf unit, and it is the most expensive unit in this roundup while delivering the lowest capacity tier. There is also a reported fan mount design where the motor and fan sit on self-tapping screws in rubber grommets, which can back out and jam the fan.
How to Choose an RV Air Conditioner for a Travel Trailer
Most buyers spend their research time on BTU and almost none on fit. In our view that is backwards, because a 15,000 BTU unit that does not match your roof opening, your duct layout or your thermostat is worth exactly nothing.
What BTU size do you actually need?
The rule of thumb for travel trailers breaks into four tiers:
10,000 BTU and under: too weak for anything but a small pop-up. Owners upgrading almost always move up, not sideways.
13,500 BTU: the travel trailer default. This is what most trailers up to around 30 feet shipped with, and it is the safe like-for-like choice.
15,000 BTU: the right answer for a 30 foot trailer or longer, for a trailer with a slide-out, or for hot climates. It is the most common upgrade and the one forums recommend most.
20,000 BTU and above: overkill for a travel trailer, and it adds electrical load and roof weight for capacity you will rarely use.
Oversizing is not the answer when a unit seems to struggle. A larger unit on inadequate wiring or a marginal 30 amp service will trip breakers or overheat conductors, which is a far more common failure than a compressor that is simply too small.
Can you run a 15000 BTU unit on 30 amp service?
Usually, but not without checking three things. A 15,000 BTU unit is generally a 30 amp load, and a 30 amp service also has to run your refrigerator, your converter or charger and anything else you leave switched on. That leaves very little headroom.
Check the wiring gauge before anything else. Most 15,000 BTU units want 12/3 wiring, and travel trailers have shipped with 14/3. One owner on the Forest River forums reported burned wiring behind a unit rated well below 15,000 BTU because the trailer was built with 14/3 conductors.
Consider a soft start device if you are on older electrical. On the Forest River forums, owners running a Coleman Mach 15K on a Micro-Air Easy Start reported an easy install with no permanent changes to the AC and were very happy with the result. A soft start reduces compressor surge current, which is what trips a marginal breaker in the first place.
Ducted or ductless: which layout do you have?
Ducted means air travels from the upper unit through ceiling ducts or an air distribution box to vents in each room. Non-ducted, or ductless, means the unit blows directly into one space, usually the living area. Your existing layout decides which replacements you can buy, and several of the units here only work one way.
The Furrion Chill Cube is ducted, and its air distribution box is a separate purchase. Most Coleman and Dometic units support both. Buying the wrong configuration is one of the more common reasons a rooftop swap gets delayed by a week.
The single-zone and multi-zone thermostat trap
This is the compatibility mistake that costs the most money. A single-zone unit drives one thermostat for the whole trailer. A multi-zone unit needs a controller that can address separate front and rear zones.
The Dometic Brisk II is single-zone only, which is fine if it replaces a single-zone unit and a problem if your trailer runs a multi-zone wall thermostat. The Dometic Penguin II works with CCC2 or CT thermostats in both single and multi-zone setups, and the Blizzard-style units are the ones owners pick when multi-zone matters. Check your controller model before you order, not after.
Replacing one unit versus adding a second
A replacement fits the existing opening, uses the existing wiring and inherits the existing control box. A second AC needs a new roof cutout, new wiring run, an interior air distribution box, and enough service capacity for two units.
That is why the second-unit project fails more often than the replacement project. On a 30 amp service, two rooftop units plus a refrigerator and a charger is not a realistic load. Verify the service rating before you commit, and consider whether a single larger unit in the front is the better use of the same electrical budget.
A short maintenance schedule that prevents most failures
Six habits cover almost every rooftop AC complaint we read about:
Clean or replace the return air filter every season, and more often if you camp in dusty sites.
Vacuum the evaporator coil annually so airflow stays high.
Flush the condensate drain line before spring and check it is not pinched or kinked.
Keep the condenser coil clear of debris and bird nests on the roof.
Have the refrigerant charge and capacitor checked annually before the first hot week.
Run the unit for 15 minutes before a trip so any icing or drain issues show up in your driveway.
Most “my AC is not cooling” reports trace back to a clogged filter, a dirty coil, a blocked drain or a thermostat. Those four are free or cheap to check before anyone starts adding refrigerant.
Frequently Asked Questions
What is the best air conditioner for a travel trailer?
The Dometic Brisk II 15K is the best overall travel trailer rooftop air conditioner because it drops into existing Dometic control boxes and has the largest review base of any unit here. For off-grid trailers the RecPro 15K heat pump runs at a much lower amp draw, and for low roofs under 10 inches the Dometic Penguin II is the only real answer.
How many amps does it take to run a 15000 BTU RV air conditioner?
A 15,000 BTU rooftop RV air conditioner typically pulls close to a full 30 amp circuit, which is why most travel trailers need a 30 amp service and why a second unit will not fit on one. Check that your wiring is 12/3 rather than 14/3, and consider a soft start device if the compressor trips the breaker on start.
Is it better to oversize or undersize an RV AC unit?
Stay close to the capacity your trailer shipped with. Undersizing shows up as a unit that cannot keep up in direct sun, but oversizing loads your wiring and service beyond what it was designed for. 13,500 BTU suits most trailers up to about 30 feet, and 15,000 BTU is the sensible upgrade for longer rigs or hot climates.
Which brand of RV air conditioner is the most reliable?
Dometic and Coleman dominate owner satisfaction because parts, control boxes and roof cutouts are widely shared across the industry. Reviews on this roundup cluster around 4.1 to 4.5 stars for both. Expect a rooftop unit to last roughly 10 to 15 years, and treat the two-year manufacturer coverage on most of them as the real baseline.
What is the life expectancy of a Coleman Mach RV air conditioner?
Owners commonly run Coleman Mach rooftop units for a decade or more when they keep the filter and condenser clean and service the refrigerant charge annually. Most failures trace to a dirty evaporator coil, a blocked condensate drain or a failing start capacitor rather than a burned-out compressor, all of which are cheap to prevent.
What AC brands should RV owners stay away from?
There are no universally bad brands in rooftop RV air conditioners, but some configurations cause trouble. Avoid remote-only units if you rely on a wired wall thermostat, avoid single-zone models like the Dometic Brisk II if your trailer runs multi-zone controls, and avoid any unit whose roof opening and wiring gauge you have not confirmed.
Final Verdict: Our Best RV Air Conditioners for Travel Trailers in 2026
For most trailer owners, the Dometic Brisk II 15K is the best RV air conditioner for travel trailers in 2026 because it fits the systems most trailers already have and it is backed by the largest body of real-world feedback we could find. Buy it, budget for the control box, and check your multi-zone situation first.
Choose the Coleman Mach 15 if you want a heat pump and the safest fitment story, the RecPro 15K if you run off-grid and care about amps, and the Dometic Penguin II if roof height is the binding constraint. Whichever you pick, confirm the opening, the duct layout, the thermostat type and your wiring gauge before the box is on its way.
Updated for October 2026. We may earn a commission from qualifying purchases made through the links on this page.