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  1. RV Air Conditioners
  2. Advent Air
  3. A/C Unit Only
  4. Dometic
  5. 13500 Btu
  6. Cool Only
Advent Air Replacement RV Air Conditioner for Dometic Setup - Start Capacitor - 13,500 Btu - White

Advent Air Replacement RV Air Conditioner for Dometic Setup - Start Capacitor - 13,500 Btu - White

Item # ACDOM135
Our Price: $617.08
RV Air Conditioners
This item qualifies for Free Shipping
Shipping Weight: 80 lbs
In Stock
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Product Expert Kathleen M

Is this right for you? Product Expert Kathleen M says:

Yes, if you:

  • Are replacing a Dometic AC unit and want to be able to use the existing components inside your RV
  • Prefer for your AC to match your RV's lighter exterior
  • Have a ducted RV that will benefit from the higher CFM rating of the Advent Air model

No, if you:

  • Camp in very hot, humid areas where this AC might not have enough power to keep you cool
  • Need to replace a full AC setup instead of just the roof unit
This AC unit replaces the Dometic air conditioner on your RV or camper. AC plugs directly into your Dometic setup to work with your existing air distribution box. Start capacitor jumpstarts AC when camp power or generator power isn't enough. Great Prices for the best rv air conditioners from Advent Air. Advent Air Replacement RV Air Conditioner for Dometic Setup - Start Capacitor - 13,500 Btu - White part number ACDOM135 can be ordered online at or call 1-800-940-8924 for expert service.
  • All Info
  • Reviews (558)
  • Q & A (0)
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  • Why etrailer?

Advent Air RV Air Conditioners - ACDOM135

  • A/C Unit Only
  • Dometic
  • 13500 Btu
  • Cool Only
  • With Start Capacitor
  • Advent Air
  • White
  • Ducted
  • Ductless

This AC unit replaces the Dometic air conditioner on your RV or camper. AC plugs directly into your Dometic setup to work with your existing air distribution box. Start capacitor jumpstarts AC when camp power or generator power isn't enough.


  • Air conditioner replaces your Dometic rooftop AC to quickly and efficiently cool the interior of your RV or camper
    • Plugs directly into your Dometic setup to work with your existing air distribution box and thermostat
    • Compatible with a ductless or ducted system
  • 6-Blade fan with motor provides sufficient airflow
  • 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
  • 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
  • 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): 9.9 amps
  • Fan motor power draw (while running): 2.6 amps
  • Cooling capacity: 13,500 Btu per hour
  • Electrical rating: 115V, 60Hz
  • Air flow: 500 cubic feet/minute
  • Overall dimensions:
    • Air conditioner: 31-3/16" long x 24-7/8" wide x 12-13/16" 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 warranty

Advent Air Dometic Plug-In

This AC unit from Advent Air is designed to replace the old or broken Dometic air conditioner on your RV or camper. It plugs directly into your Dometic setup and works seamlessly with your existing, in-good-working-order Dometic air distribution box and thermostat. This eliminates the need of an adapter wiring kit, which saves you time and effort. 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. 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 your AC unit is included, which makes installation simple and easy.

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 13,500 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 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 - Dealer information  AA dealer info

ACM135 Advent Air Rooftop RV Air Conditioner - 13,500 Btu - White

ACMSCKIT Advent Air Start Capacitor for RV Air Conditioners

Installation Details ACDOM135 Installation instructions

California residents: click here

Customer Satisfaction Score:

Customer Reviews

Advent Air Replacement RV Air Conditioner for Dometic Setup - Start Capacitor - 13,500 Btu - White - ACDOM135

Average Customer Rating:  4.5 out of 5 stars   (558 Customer Reviews)

This AC unit replaces the Dometic air conditioner on your RV or camper. AC plugs directly into your Dometic setup to work with your existing air distribution box. Start capacitor jumpstarts AC when camp power or generator power isn't enough.


Direct replacement for Dometic Duotherm A/C. This was easy as advertised Plug and PLay. Start capacitor was also a nice addition and was also plug and play. Shipping was very fast and on time. Excellent price was a bonus because I ordered cause no other suppliers could tell you what would work with my existing system. Thanks for the Great Service and Great Product.


Very loud ac unit. I actually had to take the shroud off, put a cushion between a copper pipe and the compressor to reduce one noise. It does cool good though, and was easy to install.


I am so happy with my Advent A/C unit. I live in Florida and have duo residency with my 82 year old mom who I take care of and an RV for " my time". MY Dometic went out, this fit perfectly and I had a neighbor do it. The price was right especially for me, as I'm disabled as well. I would highly recommend an Advent.


Shipping speed was great. Arrived before estimated date when I first placed the order. Installed in under a hour by myself. Everything worked as it should. Plugged right in and screwed it down with the original fixture plate. Looked to be better quality copper work and supports than my old dometic.

Only problem was the shipping company. It arrived on its side and must of been upside down at some point because the capacitor fell out of its holder. A big no-no when it comes to compressors as the oil could migrate and sieze it up if you try and start it immediately. No major physical damage and the unit did fire up with no issues, After a waiting period of being upright.

Overall. Good price, fast shipping. Would buy again


Direct replacement for Duotherm Brisk air as advertised. Start capacitor nice addition. Mounted on base right side of unit. (See pics) Swap used all existing interior controls. Took about one hour. Shipped and delivered on estimated dates. Nice cold air.


Had to replace unit that was original to my 1999 Lance camper. Works great and easy to install


The Advent A/C unit is working great. Hardest part is getting it up on the roof. 6 plug works as advertised and was easy. There was a thermistor freeze protection with two wires that came from the Dometic unit. No one I contacted at etrailer or Advent had any idea it existed and couldn’t help me find a replacement. It’s working fine without it, but was concerning for a while.


It seemed to blow colder air than the other a/c in my rv.


Complete job done in one hr.simple install old thermostat may need upgrade won't shut off but cools it down fast and quiet.


ihad unit installed.worked good for 5 days now just blowes hot air. wood not recom

Here is a page that will help you troubleshoot the problem at hand, I am sorry that you are having issues. If these dont help let me know and we can keep troubleshooting for you.
-- Etrailer Expert David B - 08/25/2022


The product that was ordered was right on the money. That made installation the easiest that I have ever did. The only thing that could of made it better was new hold down bolts. My fault I should of ordered them when we bought the unit. Special thank you for your extremely fast shipping and awesome pricing.


Great price, fast delivery!


Have used 2 times works well


Installed the unit today and was very e asy


Shipped extremely quickly, great price. Just like I have become used to from trailer.


good product works well


great air conditioner e trailer help out staff on top of every thing thank you


Everything was good except it recieved a dent during shipping.


Product arrived in a timely manner was easy to install and works perfectly. We've been to some hot weather and have been very comfortable. I've actually purchased several products from etrailer and have never been disappointed.


Super easy installation ... plug and play !! Quiet when running and.cools great. Very happy so far


A/C unit seems to work well. Was easy to install at home. A good value for the money. Sales people were professional and polite. Shipping was fast and hassle free.


Performs as expected.


Very easy process and professional staff. I will be giving your websites to friends and family.


Easy ordering, speedy shipment, and easy instillation.


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