MRCOOL® TravelCool™ Roof Opening Size: Everything You Need to Know Before Cutting Your RV Roof
Installing a rooftop RV air conditioner starts with one critical measurement—your roof opening. Before lifting your new MRCOOL® TravelCool™ RV Inverter Heat Pump onto your camper, travel trailer, fifth wheel, or motorhome, it’s essential to verify that the roof opening matches the manufacturer’s specifications.
A correctly sized roof opening ensures the mounting gasket seals properly, the rooftop unit sits securely, and the interior air distribution box aligns correctly. An incorrect opening can lead to water leaks, improper airflow, vibration, and unnecessary installation challenges.
Whether you’re replacing an existing rooftop air conditioner or installing a new system, understanding the required roof opening dimensions can save time and help ensure a successful installation.
MRCOOL® TravelCool™- Install Manual
Required Roof Opening Size
The MRCOOL® TravelCool™ requires a roof opening measuring:
14.17 inches × 14.17 inches
Metric
360 mm × 360 mm
This opening allows the rooftop unit, mounting hardware, and interior assembly to fit together correctly while providing the proper gasket compression needed to create a weather-resistant seal.
Why the Roof Opening Size Matters
The roof opening isn’t just a hole in the roof—it’s the structural mounting point for the entire system.
Using the correct dimensions helps:
- Create a watertight seal
- Properly compress the mounting gasket
- Support the rooftop unit
- Prevent vibration
- Ensure proper airflow
- Align the interior ceiling assembly
- Reduce the chance of installation issues
Maximum Roof Thickness
The TravelCool™ installation system is designed for RV roofs up to:
5 inches (127 mm)
Before installation, measure your roof thickness to verify compatibility.
Replacing an Existing RV Air Conditioner?
Many RVs already have a standard rooftop air conditioner opening. Even if your RV previously had a rooftop unit installed, always measure the existing opening before purchasing or installing a replacement.
Inspect the surrounding roof structure for:
- Water damage
- Rot
- Delamination
- Loose framing
- Damaged mounting surfaces
- Old gasket material
Cleaning the mounting surface and removing all old gasket material helps create a proper seal with the new gasket supplied with the TravelCool™ system.
How to Measure Your Roof Opening
Measure from inside edge to inside edge.
Take measurements in both directions:
- Width
- Length
Confirm that both dimensions measure 14.17 inches (360 mm).
Also verify that the opening is square and free of damage.
Installation Tips from MRCOOL DIRECT
- Remove all old sealant and gasket material.
- Never reuse an old mounting gasket.
- Inspect the roof framing before installation.
- Ensure the mounting surface is clean and level.
- Measure twice before lifting the unit onto the roof.
- Tighten mounting bolts evenly in a crisscross pattern.
Common Mistakes
Avoid these common installation errors:
❌ Assuming all RV openings are identical
❌ Measuring outside dimensions instead of inside dimensions
❌ Reusing an old gasket
❌ Installing on damaged roof decking
❌ Overtightening mounting bolts
❌ Ignoring maximum roof thickness
Frequently Asked Questions the MRCOOL® TravelCool™ Roof Opening Size: Everything You Need to Know Before Cutting Your RV Roof.
What size roof opening does the MRCOOL TravelCool need?
14.17” × 14.17” (360 mm × 360 mm).
Can I use an existing RV roof opening?
In many cases, yes—if it matches the required dimensions and the surrounding roof structure is in good condition.
Should I replace the mounting gasket?
Yes. Always use the new gasket supplied with the unit rather than reusing the old one.
Can I enlarge my roof opening?
If your existing opening does not meet the required dimensions, modifications may be possible. Be sure to follow the installation manual and ensure the roof remains structurally sound and properly sealed.
Does roof thickness matter?
Yes. The TravelCool™ is designed for RV roofs up to 5 inches (127 mm) thick.
Why Buy Your TravelCool™ from MRCOOL DIRECT?
When you buy from MRCOOL DIRECT, you’re getting more than just an RV air conditioner. Our team specializes in MRCOOL products and can help you understand installation requirements, compatibility, and accessory selection before you order.
We provide:
- Expert product guidance
- Fast shipping on qualifying orders
- Genuine MRCOOL products
- Helpful installation resources
- Friendly customer support before and after your purchase