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How to Install RV AC Unit

If you’re an avid traveler or a camping enthusiast, having a reliable air conditioning (AC) unit in your RV is crucial for a comfortable journey.

Whether you’re embarking on a cross-country road trip or spending a weekend at a scenic campground, knowing how to install an RV AC unit can make all the difference.

In this comprehensive guide, we will walk you through the step-by-step process of installing an RV AC unit, ensuring that you can enjoy a cool and refreshing atmosphere no matter where your adventures take you.

How to Install RV AC Unit: A Step-by-Step Guide

Gathering the Necessary Tools and Materials

Before you begin the installation process, it’s important to gather all the necessary tools and materials.

Here’s a checklist of items you’ll need:

  1. RV AC unit
  2. Screwdriver
  3. Drill
  4. Measuring tape
  5. Silicone sealant
  6. Mounting gasket
  7. Screws and bolts
  8. Electrical tape
  9. Wire cutters
  10. Wire connectors
  11. Power supply

Choosing the Right Location for Installation

The first step in installing an RV AC unit is to choose the optimal location.

Consider the following factors when selecting the installation spot:

  1. Adequate space: Ensure that there is enough space on the roof of your RV to accommodate the AC unit.
  2. Clearance: Make sure there is sufficient clearance around the chosen location to prevent any obstructions or interference.
  3. Airflow: Opt for a location that allows for efficient airflow and proper ventilation.

Preparing the Roof for Installation

Once you’ve identified the ideal location, it’s time to prepare the roof for installation.

Follow these steps:

  1. Measure and mark: Use a measuring tape to mark the exact position where the AC unit will be installed.
  2. Drill holes: Carefully drill holes along the marked area, ensuring that they align with the mounting holes on the AC unit.
  3. Apply sealant: Apply a layer of silicone sealant around the holes to prevent water leakage.

Mounting the RV AC Unit

Now that the roof is prepared, it’s time to mount the RV AC unit.

Follow these steps:

  1. Place the mounting gasket: Position the mounting gasket over the drilled holes.
  2. Secure the AC unit: Carefully lift the AC unit and place it onto the mounting gasket. Align the mounting holes of the unit with the drilled holes on the roof.
  3. Fasten the AC unit: Secure the AC unit in place by tightening the screws or bolts through the mounting holes.

Electrical Connections

Proper electrical connections are crucial for the functioning of the RV AC unit.

Follow these steps:

  1. Cut the power: Before proceeding with the electrical connections, ensure that the power to your RV is turned off.
  2. Connect the wires: Use wire cutters to strip the insulation off the wires connected to the AC unit. Connect the corresponding wires from the RV’s power supply using wire connectors.
  3. Insulate the connections: Wrap electrical tape around the wire connections to provide insulation and prevent any potential hazards.

Testing and Finishing Touches

Once the AC unit is securely mounted and the electrical connections are in place, it’s time to test the installation.

Follow these steps:

  1. Restore power: Turn on the power supply to your RV.
  2. Test the AC unit: Switch on the AC unit and adjust the settings to ensure it is functioning properly.
  3. Check for leaks: Inspect the sealant around the unit and the roof for any signs of leakage. Apply additional sealant if necessary.


Can I install an RV AC unit on my own?

Yes, with the right tools and knowledge, installing an RV AC unit can be a DIY project. However, if you’re unsure or uncomfortable with the process, it’s always recommended to seek professional assistance.

What should I do if my RV doesn’t have pre-drilled mounting holes?

If your RV doesn’t have pre-drilled mounting holes, you will need to consult the manufacturer’s instructions or seek professional guidance on how to proceed with the installation.

Can I use my RV’s existing power supply for the AC unit?

It depends on the power capacity of your RV and the requirements of the AC unit. It’s important to ensure that your RV’s power supply can handle the additional load of the AC unit. Consult the manufacturer’s specifications for compatibility.

How often should I maintain my RV AC unit?

Regular maintenance is essential for optimal performance and longevity of your RV AC unit. It’s recommended to clean the filters, coils, and vents regularly and have a professional inspection at least once a year.

Can I install a second AC unit in my RV?

In some cases, installing a second AC unit in an RV may be possible, depending on the size and power capacity of your RV. However, it’s best to consult a professional to determine if your RV can accommodate the additional unit.

Can I run my RV AC unit on a generator?

Running an RV AC unit on a generator is possible, but you need to ensure that the generator’s power output is compatible with the AC unit’s requirements. Refer to the manufacturer’s specifications for guidance.


Installing an RV AC unit is a task that requires careful planning, proper tools, and precise execution.

By following the step-by-step guide outlined in this article, you can confidently install an AC unit in your RV and enjoy a comfortable and refreshing environment during your travels.

Remember to prioritize safety, consult manufacturer instructions, and seek professional assistance whenever necessary.

Happy camping!