Advent Air RV Air Conditioners - ADV42SR

Upgrade your RV's ductless AC with this complete system from Advent Air. New R32 refrigerant meets 2025 EPA regulations. Not backwards compatible with any AC systems from 2024 and earlier.

Features:

• Air conditioner quickly and efficiently cools the interior of your RV or camper
  • Replaces, upgrades, or adds an air conditioner
  • Compatible with a ductless system
• Start capacitor jumpstarts the AC unit if your campsite or generator isn't supplying enough power
• 6-Blade fan with motor provides sufficient airflow
• Thick, collapsible gasket with foam pads provides support between the roof and AC
  • Gasket seals the opening to prevent water seepage and air leaks
  • Foam pads help reduce noise
• Hard plastic cover protects internal components from water and debris
  • Can easily be removed for maintenance and cleaning
• Bolt-on installation - mounting hardware not included
  • Includes wiring harness
• Electric heat strip (ADV34QR - sold separately) can be added to remove the chill on cold or frosty mornings
• UL and cUL certified

Specs:

• Application: Motorhomes, 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:
  • 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: R32, 16.9 oz
• Wire gauge: 12 AWG
• Air conditioner weight: 68 lbs
• 2-Year limited warranty

Notes:

• This unit is not backwards compatible with any AC systems from 2024 and earlier. New R32 refrigerant meets 2025 EPA regulations.
• This unit is not compatible with any Dometic Duo Therm RV AC systems.

Air Distribution Box and Thermostat

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

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

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.

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), you'll 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 

Warranty - 2-Year Card 

Warranty - Dealer Information 

ACR150B Advent Air RV Air Conditioner - 15,000 Btu - Black - R32

ACRND25 Air Distribution Box w/ Built-In Thermostat for Advent Air RV Air Conditioners - White - R32

ACMSCKIT Start Capacitor for Advent Air RV Air Conditioners