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  1. RV Air Conditioners
  2. Advent Air
  3. Complete AC System
  4. 15000 Btu
  5. Ductless
  6. Cool Only
Advent Air RV Air Conditioner System - Manual - 15,000 Btu - White

Advent Air RV Air Conditioner System - Manual - 15,000 Btu - White

Item # ACM150C
Our Price: $801.12
RV Air Conditioners
Shipping Weight: 89 lbs
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Ductless AC unit lets you replace an existing AC or add a new AC to your RV. Air distribution box has a built-in thermostat to control the fan and temperature. Start capacitor jumpstarts the AC when camp power or generator power isn't enough. Great Prices for the best rv air conditioners from Advent Air. Advent Air RV Air Conditioner System - Manual - 15,000 Btu - White part number ACM150C can be ordered online at or call 1-800-940-8924 for expert service.
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Advent Air RV Air Conditioners - ACM150C

  • Complete AC System
  • 15000 Btu
  • Ductless
  • Cool Only
  • Advent Air
  • With Start Capacitor

Ductless AC unit lets you replace an existing AC or add a new AC to your RV. Air distribution box has a built-in thermostat to control the fan and temperature. Start capacitor jumpstarts the AC when camp power or generator power isn't enough.


  • Air conditioner quickly and efficiently cools the interior of your RV or camper
    • Replaces, upgrades, or adds an air conditioner and air distribution box
    • Compatible with only ductless systems
  • 6-Blade fan with motor has 3 speed settings for increasing or decreasing airflow
  • Air distribution box has adjustable registers on the front and back that let you direct the air where needed
    • Internal aluminum components are rustproof
  • Built-in thermostat controls the fan and temperature settings
  • Start capacitor jumpstarts the AC when a campsite or generator doesn't provide enough power
    • Stores energy that will later be used for the next startup
  • Thick, collapsible gasket with 6 foam pads provide support between RV roof and air conditioner
    • Gasket seals the opening to prevent water seepage and air leaks
    • Foam pads help reduce noise
  • Removable air filter prevents dust and dirt build-up on the fan blades
  • White, hard plastic cover protects internal components from water and debris
    • Can easily be removed for maintenance and cleaning
  • Bolt-on installation
    • Includes wiring harness and mounting hardware
  • Electric heat strip (ACMHD - sold separately) can be added to remove the chill on cold or frosty mornings
  • UL and cUL certified


  • Application: Motor homes, travel trailers, and fifth wheels
    • Not approved for school buses, food trucks, enclosed/utility trailers, or off-roading vehicles
  • Fits: roofs 2-1/2" to 5" thick
    • Opening size: 14-1/4" long x 14-1/4" wide
  • Air conditioner power draw (while running): 15 amps
  • Compressor power draw (while running): 12.4 amps
  • Fan motor power draw (while running): 2.6 amps
  • Capacity: 15,000 Btu per hour
  • Electrical rating: 115V, 60Hz
  • Air flow: 500 cubic feet/minute
  • Thermostat temperature range: 65 F to 90 F (16 C to 30 C)
  • Overall dimensions:
    • Air conditioner: 31-3/16" long x 24-7/8" wide x 12-13/16" tall
    • Air distribution box: 22-1/2" long x 21-1/2" wide x 3-1/2" tall
    • Start capacitor: 2-1/8" long x 3-5/8" deep x 6-5/16" tall
  • Refrigerant: R410a, 16.9 oz
  • Wire gauge: 12 AWG
  • Air conditioner weight: 68 lbs
  • 2-Year limited warranty

This Advent Air AC unit lets you replace an existing, old or broken air conditioner or add a new air conditioner to an area on your RV or camper that doesn't already have one. The AC has a powerful fan and motor that provides a steady stream of air to efficiently cool the inside of your RV on a hot or muggy day. For your convenience, the included air distribution box has a built-in thermostat that lets you set the fan speed and temperature. The included start capacitor will help jumpstart the AC. This beneficial upgrade provides the AC a boost when shore power or generator power isn't enough to start it. And everything you need in order to replace or add an AC unit is included, which makes installation simple and easy.

Air Distribution Box and Thermostat

Advent Air Air Distribution Box

The AC unit includes an air distribution box with a built-in thermostat. The dial on the left controls the 3 cool settings and the 3 fan speed settings, which let you increase or decrease the airflow. If you add an electric heat strip (sold separately) to remove the chill on cold mornings, then the dial also controls the heat setting. The dial on the right allows you to set the temperature. Additionally, there are adjustable registers on the front and back of the box. These can be tilted up, down, or side-to-side for directing the air where needed. The removable air filter prevents dust and dirt from building up on the fan blades.

Start Capacitor

Advent Air Start Capacitor

If your campsite or generator isn't able to draw the power you need, then you may have difficulty starting your AC unit. The included start capacitor, however, can eliminate this problem. The capacitor stores energy that will later be used to jumpstart the AC. Once the sufficient amount of power has been supplied to the AC, the compressor will start to run, and the internal relay switch will turn the start capacitor off. At the same time, the compressor will send "back voltage" to the relay switch and capacitor in order to energize them for the next startup.

Simple Installation

Advent Air AC Installation 15,000 BTU

Because your RV is likely already prepped and pre-wired for an AC unit, installation is simple and easy. Most AC units, including this one, are designed to fit an opening that measures 14-1/4" x 14-1/4". Depending on your roof setup, you may need to do minimal alterations. If the opening is larger than 14-3/8" x 14-3/8", you will need to install spacers between the sides of the unit and the opening's edges. If the opening is smaller than 14-1/8" x 14-1/8", you will need to enlarge the hole to fit the unit snugly inside the opening.

Advent Air AC Collapsible Gasket and Foam Pads

On the bottom of the AC, there's a thick, collapsible gasket with 6 noise-reducing foam pads. This provides support between the RV roof and AC and seals the opening to prevent water and outside air from leaking in. Because of this, the use of fresh sealant isn't required during installation.

To install the start capacitor, bolt it to the fan motor support with the included hardware and then route the wires to the run capacitor.

Once installed, the hard plastic cover on the AC can easily be removed for maintenance and cleaning.

Advent Air Warranty Coverage

2-Year limited warranty covers defective units when installed correctly on approved applications. The warranty does not cover units installed incorrectly. To ensure air conditioner is installed correctly, please see the questionnaire pdf below. A filled-out questionnaire is required for warranty coverage.

If you are not comfortable using a voltmeter (or removing the charge from the start capacitor), youll want to make a service appointment with your local RV dealer to verify the installation. Print the pdfs below (warranty- questionnaire, warranty dealer information) and take them along with the RV to your local dealer. ASA does compensate dealers for warranty work as outlined in the dealer information pdf. You may be charged by the dealer for time spent investigating the installation.

Warranty - Questionnaire  AA Questionnaire

Warranty - 2-Year Card  AA 2-Year Card

Warranty - Dealer Information  AA dealer info

ACM150 Advent Air RV Roof Air Conditioner - 15,000 Btu - White

ACDB Advent Air RV Plenum for Air Conditioners - White

ACMSCKIT Advent Air Start Capacitor for RV Air Conditioners

California residents: click here

Customer Reviews

Advent Air RV Air Conditioner System - Manual - 15,000 Btu - White - ACM150C

Average Customer Rating:  4.6 out of 5 stars   (358 Customer Reviews)

Ductless AC unit lets you replace an existing AC or add a new AC to your RV. Air distribution box has a built-in thermostat to control the fan and temperature. Start capacitor jumpstarts the AC when camp power or generator power isn't enough.


First when ordering Jamie was very helpful and was able to answer my questions. I received my order actually one day ahead of schedule. But once I opened the box the unit was damaged. But I had mine off and a hole in roof so I opted to keep it and install. The unit was very easy to install and went together well. It is not any louder than my old unit. It looks very nice. And seems to work just as advertised. I am very pleased. I did email e trailer about the damage and they got back to me very promptly. We reached an agreement and again I’m very pleased at this point.


Seems to run as advertised. Popped the circuit breaker, once. My biggest issue was shipping damage because of the poor packaging. Basically, a cardboard box with the unit unprotected inside. Three units were delivered, all damaged in shipping. I was able to piece together one good unit from all the broken or dented parts, and ship back the damaged goods. The units need to be packaged better to avoid the damage and hassle.


The AC is perfect for our motorhome.


While we had it, there were no issues. Worked great. RV has been sold since.


I purchased the 15,000 btu model
was fast the unit works fantastic installation was pretty easy my trailer was preset up,you definitely need the hard start capacitor as my 4500 watt generator starts it but wouldn’t without it I also purchased the heater strip that is all the pros the only con is the 2 knobs that control pop off once in a while so I glued them on definitely would purchase again

by: did they job delivering it on time, good packaging and working properly.

This equipment does a good job, in the trailer is always way cooler than outside, but I still wish the AC Unit was a little more powerful. I won’t complain though, it was definitely a cheaper equipment. I could have spent a lot more in a different unit.


etrailer shipping was prompt, we received exactly what we ordered. The Advent AC was as expected, a plug and play unit. Out of all the other work we've done on our 2000 trailer, installing this unit was one of the easiest. The unit works great, at times its too cold. And its def quieter than our 2000 unit. Overall I recommend it and easy to DIY.


Etrailer was very easy to deal with. Prompt responses to updates on shipping and delivery. Delivered ahead of schedule. But box was damaged. Unit had damage to exterior. They promply provided us with resolution options. Would definitely deal with etrailer in the future.


Came faster than expected. Installation was easy. Works great.


Keeps the horse trailer really cold during the 100 plus degree summer, Only thing is when it rains it leaks but that could have also been user error when installing it. We had to replace our old AC since it quit working on us and this one is doing the job really well.


An excellent replacement unit for an aging and unreliable Coleman unit. My only issue is it sometimes, under heavy load, trips the 20 amp circuit breaker it is being supplied from.


always awsome dealing with e trailer th nx!!!!


This a/c is very quiet, efficient and effective. The heat pump reduced my propane use dramatically.


Awesome product and service.


The advent air conditioner is very quiet and works great. It was also easy to install.


Works great in my race trailer


Great customer service. Noah was very helpful and I received all the parts timely and thanks to Noah the install was easy!


Received product on the day promised. Product had a little damage from shipping. Don't think it will affect the ac working properly. Haven't installed yet. Planning on it this weekend. Will follow-up. Ac seems to be better made and heavier duty than the original.


Sent wrong parts , but Reesa in customer service quickly rectified the problem and shipped proper stuff.
Awesome team of people.


It was easy to install and works perfect






Show More Reviews

See what our Experts say about this Advent Air RV Air Conditioners

  • Replacement Distribution Box Needed for Carrier RV AC
    The model number you list is for the Carrier Air V, it is no longer produced. We do not have the replacement part you request available. If you want to consider replacing the entire unit, I suggest the Advent Air RV Air Conditioner w/ Air Distribution Box and Start Capacitor, 15,000 Btu, # ACM150C. This is a complete set-up with a start capacitor that allows for easier start ups and assists with generator starts while boondocking.
    view full answer...
  • Recommended RV Rooftop AC Unit with Ceiling Vent and Controls
    Great question. We do have the Advent Air Rooftop RV Air Conditioner # ACM150 with the interior components. It is part # ACM150C and it also includes the start capacitor. That capacitor is extremely helpful in making sure you can start your AC even when the shore power isn't able to draw that capacity. The capacitor will automatically refill to ensure you never have an issue starting your AC. The vent assembly has a built in thermostat to control fan settings and temperature. There...
    view full answer...
  • Recommended Replacement for Dometic Duo-Therm RV Air Conditioner
    We do offer a direct replacement for the Dometic Duo-Therm RV Air Conditioner. The Advent Air RV Air Conditioner part # ACM135 for 13.5K or part # ACM150 for 15K is what I recommend. This unit will be a plug and play fit and it will work with your existing thermostat. If you replace the thermostat you're looking at an entire new system and this will require wiring so unless yours no longer works I recommend keeping it. The complete system is part # ACM135C for 13.5K or part # ACM150C...
    view full answer...
  • Is There a White Version of the Advent Air RV Air Conditioner ACM150BC
    Yes. The white version of the Advent Air RV Air Conditioner w/ Air Distribution Box and Start Capacitor - 15,000 Btu - Black # ACM150BC is part number # ACM150C. This is the exact same unit you were looking at, which is a non-ducted unit, only white in color to match your RV.
    view full answer...
  • Can I Install Advent Air Conditioner In Skylight Cut Out On Travel Trailer
    The Advent Air RV Air Conditioner part # ACM150C installs into a 14-1/4" long x 14-1/4" wide roof opening. If you remove the skylight and the opening is smaller than 14-1/4" long x 14-1/4" you can carefully cut the opening to make it larger, however it is recommended to install the unit slightly forward of the center of the center of the roof and centered from side to side. I have attached diagrams from the installation instructions for your reference.
    view full answer...
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  • Troubleshooting Advent Air AC Unit Shutting Off During Runtime
    Thank you for your purchase of the Advent Air RV Air Conditioner System # ACM150C! When it comes to troubleshooting you want to start off with the easy things like the air filter and your wiring connections. Check your air filter and clean it if it is dirty and clean up/repair any damaged wiring or connections. If all of that looks good then move on to see if the unit is freezing - if the AC unit is freezing then you need to wait for it to thaw out. If all of this looks good then you...
    view full answer...
  • What Wire For Advent Air RV Air Conditioner Provides 12 Volt DC To Thermostat
    For the Advent Air RV Air Conditioner, # ACM150C, the 12 Volt DC output to thermostat is the red wire with white stripe. Ensure you have a solid ground for the green thermostat wire.
    view full answer...
  • How to Determine the AC BTU Rating Needed to Cool an Enclosed Trailer
    Based on the square footage of your 28 foot utility trailer the minimum BTU rating you'd need from an AC unit would be 4,760. So the Advent 15k BTU unit part # ACM150C would easily handle cooling your trailer. There'd be no need to add a second unit. To determine how much BTU is needed for a trailer you take the square footage and multiply it by 20 btu and that's the minimum needed.
    view full answer...
  • Recommended AC Unit for 26 Foot Enclosed Trailer
    To cool down your 26 foot enclosed trailer I highly recommend the Advent Air RV Air Conditioner # ACM150C, which includes both the air distribution box and a start capacitor as well. The start capacitor in particular is a great feature that basically stores up energy to use for when the AC kicks on, conserving energy and reducing the amount of power needed from your batteries or inverter. The AC unit uses a 6-blade fan with motor to increase/decrease airflow, a built-in thermostat that...
    view full answer...
  • Will the Advent Air Replacement RV Air Conditioner # ACDOM150 Replace the Duo-Therm Model 59516-331
    With no ceiling assembly on your 2017 Forest River Rockwood Signature Ultra Lite Travel Trailer RV, it sounds like you might have a ducted system. The Advent AC unit part # ACDOM150 that you referenced will work great as a replacement for a Dometic Duo Therm unit that you have and can actually be used as a ducted or non-ducted unit since this is just the vent assembly. The ceiling assembly, which is not included, is really what determines a ducted or non-ducted setup. If you had a ceiling...
    view full answer...
  • Picking Out Replacement AC Unit for 2015 Jayco Jayflight 26BHS
    I don't know what unit you have on your 2015 Jayco JayFlight 26BHS but if it happens to be a Dometic the Advent Air Unit part # ACDOM150 that you referenced was designed to easily replace Dometics so it would be a really great solution. It uses wiring connectors that would plug right in and allow you to use your current thermostat. Otherwise the part # ACM150C is a really great option that comes with a start capacitor and an air distribution box.
    view full answer...
  • Replacement RV AC Unit for Dometic DUO Therm AC Unit
    We have a version of the 15k btu Advent Air AC unit that is a compatible replacement for the Dometic Duo Therm units with the part # ACDOM150 which will allow you to use your current Dometic thermostat. It will use same connector too so there isn't any additional wiring needed.
    view full answer...
  • What is Needed to Install Air Conditioner in Enclosed Car Trailer
    We can get you the air conditioning you need to keep cool in your enclosed car trailer; what you will need is a ductless AC unit with a distribution box that will control the unit as well as blow the air in, as well as a generator for a power source (if you don't have one). I highly recommend going with a 15,000 Btu AC because of its additional cooling power which will cool your trailer down quicker, especially with a 24 foot trailer, though I will list the options for both the 13,500...
    view full answer...
  • 15,000 Btu Ductless Air Conditioner For RV With Thermostat
    There is an option for a 15,000 Btu ductless RV air conditioner that does not have a wall-mounted thermostat, though there aren't any with a wireless thermostat. What you can use is an option from Advent, which has the thermostat directly on the distribution box so you don't have to use one mounted on your wall. This is available in either white or black: - White: Advent Air RV Air Conditioner with Air Distribution Box and Start Capacitor # ACM150C - Black: Advent Air RV Air Conditioner...
    view full answer...
  • AC Unit Recommendation for 32 Foot Enclosed Trailer
    AC unit BTU ratings typically call for 20 BTU per square foot. So for a trailer that is 32 foot long and most likely 8 feet wide you'd have 256 square feet to cool. That means you'd need a minimum of 5,120 BTU to cool it effectively. So the 15k BTU Advent # ACM150C that you mentioned would be way more than you'd need but it would cool the trailer very quickly. Another option is the 13.5k Advent part # ACM135CH which comes with a vent box, a heat strip (provides heat if needed), and a start...
    view full answer...
  • Wiring The Start Capacitor To An Advent Air RV Air Conditioner
    To install the Start Capacitor for Advent Air RV Air Conditioners Item # ACMSCKIT on your Advent Air RV Air Conditioner w/ Air Distribution Box and Start Capacitor - 15,000 Btu - White Item # ACM150C you'll: 1. Remove the ac shroud cover. 2. Screw the capacitor to the fan mount using the provided screws. 3. Route the wire underneath the fan over to the terminals and remove the cover on the terminals. 4. Connect one black wire to the HERM circuit tab (your red wire will be connected here...
    view full answer...
  • How To Wire In The Advent Air Start Capacitor
    I've attached a video below where Dave will walk you through the installation of the Start Capacitor for Advent Air RV Air Conditioners # ACMSCKIT on your Advent Air RV Air Conditioner w/ Air Distribution Box and Start Capacitor - 15,000 Btu - White # ACM150C. At the 1:30 minute mark he'll attach the black wire that has the single connector to the HERM Circuit and the other black wire with the second spade connector coming off of it to the common circuit.
    view full answer...
  • Replacement Shroud for AC135 RV Air Conditioner
    The # PXXMCOVER (30-5/8" long x 25-3/4" wide x 10-1/2" tall) is a fit for Advent Air RV AC units, with these part numbers: # ACM135, # ACM150, # ACM135C, # ACM150C, # ACM135CH, # ACM150CH, # ACCAR135, # ACCAR150, # ACCOL135, # ACCOL150, # ACDOM135, and # ACDOM150. Other than the AC135, are there any other model numbers or a manufacturer name anywhere on the unit? I'll need more information to determine if any of the replacement shrouds we offer will fit.
    view full answer...
  • Small Complete AC Unit for Transport Trucks
    We have a good solution for you the Advent Air RV Air Conditioner w/ Air Distribution Box and Start Capacitor part # ACM135BC would be a great choice. It will require 14"x14" hole to be made in the roof but after that it is straight forward and has everything you will need. The air distribution box has the controls on it to turn it up or down and the start capacitor will help to ensure it doesn't draw too much power when starting it. I would stya with the 13,500 BTU as this is very common...
    view full answer...
  • What is Needed to Install an Advent AC Unit on RV without Ducting
    For non-ducted AC applications you need to use a roof vent setup like the air distribution box part # ACRG15 that you referenced with the unit itself like part # ACCAR150. Or we have this setup as a kit with part # ACM150C which is the AC unit and the roof vent.
    view full answer...
  • Replacement For Carrier Air Conditioner and Air Distribution Box
    I recommend replacing your Carrier air conditioner with the Advent Air RV Air Conditioner w/ Air Distribution Box and Start Capacitor # ACM150C. Since Carrier moved away from RV air conditioners they no longer produce replacement parts and its best to replace everything at once then trying to mix and match parts. We do not have a direct replacement for your air distribution box.
    view full answer...
    Image 1 for
  • Will 13,500 Btu Advent Air Conditioner Cool Enclosed Trailer
    Yes, the 13,500 Btu Advent Air RV Air Conditioner with Air Distribution Box and Start Capacitor # ACM135C (White) or # ACM135BC (Black) will cool your enclosed trailer. These are ductless systems as I assume your trailer does not have ducts. That said, it will essentially need to always be on so you do need to monitor your generators and be sure they are full. For generators I recommend the etrailer 4,500-Watt Portable RV Generator - 3,600 Running Watts - Propane or Gas - Electric Start...
    view full answer...
  • AC Recommendation For A 2004 Sandpiper T29 Toy Hauler
    I recommend the Furrion # FR92PR as it seems to be the all around better option but the other options are listed below for you if you prefer on of them instead of the Furrion. Advent Air RV Air Conditioner w/ Air Distribution Box and Start Capacitor - 15,000 Btu - White Item # ACM150C Furrion Chill RV Air Conditioner and Air Distribution Box w/ Built-in Thermostat - 15,500 Btu Item # FR92PR
    view full answer...
  • What Is The Largest Capacity Air Conditioner Offered For RVs?
    If you're wanting a higher capacity air conditioner for your concession trailer, a 15K unit like the: -Furrion Chill Replacement RV Air Conditioner for Furrion Setup # FR86PR is the largest size offered in the industry. Your best bet is to add an additional air conditioner Advent Air RV Air Conditioner w/ Air Distribution Box and Start Capacitor # ACM150C. This will double the amount of air conditioning you receive to your trailer, and will help a lot with keeping your trailer cool.
    view full answer...
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Info for this part was:

Employee Jameson C
Expert Research:
Jameson C
Employee Adam R
Expert Research:
Adam R
Employee Kathleen M
Updated by:
Kathleen M
Employee Mary K
Updated by:
Mary K
Employee Wilson B
Updated by:
Wilson B
Employee Halie H
Updated by:
Halie H
Employee Adam Y
Updated by:
Adam Y
Employee Cody B
Updated by:
Cody B
Employee Kim H
Updated by:
Kim H
Employee Chris R
Video Edited:
Chris R
Employee Amanda M
Written by:
Amanda M
Employee David F
Installed by:
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