Hidden Lines, Hidden Problems: What to Know Before Installing Inside Walls

⚠️ Installing Refrigerant Lines Inside Interior Walls: What You Need to Know

At MRCOOL, we design our DIY systems to be as accessible and maintenance-friendly as possible. One of the most important decisions you’ll make during installation is how and where to route your refrigerant lines. While some homeowners may be tempted to conceal these lines inside their interior walls for aesthetic reasons, we do not recommend this installation method—and here’s why.

❌ Why We Advise Against Running Lines Through Interior Walls

MRCOOL systems are engineered for ease of installation and future service. Placing refrigerant lines inside an interior wall creates barriers to proper maintenance and diagnostics. If your system ever requires service—such as checking for leaks, accessing the line set, or replacing components—those hidden lines become a major complication.

This kind of installation can:

• Limit accessibility to key components

• Make troubleshooting more difficult

• Require demolition (cutting into walls) for even minor repairs

• Void aspects of your warranty if improper installation leads to damage

🔧 If You Choose to Install This Way…

We understand that every home is different, and some customers may still choose to route their refrigerant lines through interior walls for a cleaner look. If that’s the path you take, it’s important to be fully prepared for what that means long-term.

👉 Be aware: Any future maintenance or repair will require cutting into your walls to access the line set.

This includes:

• Leak inspections

• Line set replacements

• Diagnosing performance issues

• Accessing insulation or fittings

There’s no way around it—if your lines are hidden behind drywall, service work will not be as simple, and your walls will likely need to be opened to get the job done.

✅ Our Recommendation

We recommend routing refrigerant lines along exterior walls, through a line guard, or using decorative covers that provide a clean appearance and easy access. This ensures:

• Simpler installations

• Faster and cleaner maintenance

• Better protection for your system’s integrity

• Fewer surprises down the road

📞 Have Questions?

If you’re not sure what installation method is best for your space, reach out to our team! We’re here to help guide you through the process so you can enjoy reliable comfort with zero guesswork.

Customer Service Support: 

(270)366-0457

Support@mrcool.com