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Hot Air About Some Cool Stuff. Learn how maintenance agreements can help you maintain healthy indoor air quality throughout the year.

Why Are the Hallways So Much Colder Than the Rest of My Home?

A home with rooms that are always colder or hotter than others likely has an unbalanced HVAC system.

Repairman changing vents

If you have an unbalanced heating and air conditioning system, an air conditioning service contractor can balance the system through techniques such as adjusting the blower fan speed, installing dampers, and adding insulation. But your problem could be related to simple maintenance issues.

Before you call for professional service, here are some troubleshooting steps you can take on your own:

  • A dirty filter reduces air flow, so check the filter. Many newer homes have filters at multiple return air registers around the house, so make sure you know where each filter is located and confirm they are all clean.
  • Make sure all registers are open. They don’t have to be open all the way, but completely closing a register is problematic for two reasons. First, it can unbalance your system. Secondly, a closed register tends to develop condensation on the surface of the slats and/or around the perimeter of the register, with the possibility of mold growth over time.
  • Check the air ducts. If your ducts run through the attic, poke your head up into the hatch opening and look around with a flashlight for any damaged ducts, specifically at connections. If your attic is nearly as cool as your house, investigate further. Also, the newer flexible ducts sometimes get crimped by their hangers or an abrupt bend around a truss chord, and can get trampled down by careless workmen in the attic—all of which will cause reduced air flow to a room.

While you can’t expect a perfectly balanced environment throughout your house, if it seems like there is a pretty significant difference in temperatures from room to room, it’s time to call in the experts. Click this link or call 843.554.8600 to reach our friendly HVAC professionals with Morelli Heating and Air Conditioning.


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