It’s the middle of winter, and you’re probably getting calls from homeowners who want larger HVAC equipment. Their current system runs constantly and can’t keep a few rooms warm and comfortable. When most contractors receive these calls, they investigate and often find correctly sized equipment for the home’s heating needs that is operating fine.

So, what could hinder an HVAC system from heating a home on those coldest days? While there are many factors, you can frequently find one source of trouble when you measure system temperatures. Let’s look at how you can use a return grille and supply register temperature measurement to uncover one source of uncomfortable rooms.