Why Your Upstairs Bonus Room Never Cools

If there's one room in Huntsville homes that fights the thermostat, it's the bonus room over the garage. Here's why it happens — and what actually fixes it.

The usual suspects

• Long duct runs that lose air before it reaches the room
• Undersized returns, so hot air has nowhere to go
• Uninsulated garage ceiling baking the floor above
• A single zone trying to serve two very different loads

Fixes that don't require a new system

Before anyone suggests a whole new unit, these targeted corrections solve most bonus-room complaints: sealing and insulating the ducts, adding or enlarging a return, adjusting blower speed, and balancing the dampers.

When a mini-split makes sense

For a truly isolated space, a small ductless mini-split can be the most efficient answer — cooling the room on demand without overworking the main system. We'll only recommend it if the simpler fixes won't get you there.