Comfort guide
HVAC Comfort Problems — And What Your Ductwork Has to Do With Them
Homeowners rarely wake up thinking they need duct sealing. They notice a hot bedroom, weak airflow, a system that runs all afternoon, a humid house or an electric bill that doesn't make sense.
These guides explain what those symptoms can mean — including the many causes that have nothing to do with ductwork — and when the duct system deserves a closer look. If you leave better informed and never call us, the page did its job.
Looking for a specific symptom instead? The troubleshooting center answers 50 of the questions homeowners ask most, grouped by the problem you notice.
Comfort problems
Hot rooms, uneven temperatures and a house that feels humid.
Airflow problems
Weak vents, long runs and air that never quite arrives.
HVAC performance
Systems that run and run, and new equipment that did not fix it.
AC runs all day
Long runtimes are not automatically a fault — here is how to tell the difference between working hard and losing air.
Read the guideAC runs but house stays hot
The system is on, air is moving, and the thermostat never gets there. A structured way to narrow it down.
Read the guideNew AC, same problems
New equipment is usually connected to the existing duct system. Here is what a replacement does and does not change.
Read the guideNew AC or new ductwork?
A framework for telling equipment problems, duct problems, design problems and envelope problems apart.
Read the guide
Energy & cost
High cooling bills and conditioned air lost into the attic.
Duct problems
Leakage, condensation, and the difference between repair, sealing and replacement.
Ducts sweating or dripping
Condensation on attic ducts, boots and registers — what causes it and which repairs actually address it.
Read the guideRepair, sealing or replacement
Three different scopes that get talked about as one. Which one a duct system needs depends on what is wrong with it.
Read the guide
Already know the ducts are the issue?
Read how duct sealing works, see the measure-seal-verify process, or browse the FAQ.
Find out what your duct system is actually doing.
Schedule a duct leakage evaluation and get measured numbers for your home — not a guess.