Ductwork Repair, Rerouting and Replacement in Athens and Cleveland, TN
Giles Heating and Air repairs, reroutes and replaces ductwork for homes and businesses in Athens, Cleveland and the surrounding East Tennessee counties. We fix disconnected and crushed runs, seal leaks, replace rotted or undersized ducts, and redesign layouts that were never right, so every room gets the airflow it should. Many of our duct jobs are done in a day.

Signs your ductwork is the problem, not the unit
- One or two rooms are always hot in summer or cold in winter
- Weak airflow at some vents and strong at others
- Dust builds up fast no matter how often you clean
- Musty smell when the system runs
- High bills with a system that tests fine
- Crawl space or attic feels conditioned (that is your air leaking out)
- Flex duct sagging, kinked, or with the outer jacket torn open
A brand-new unit on bad ductwork will disappoint you. We check ducts before recommending a replacement system.
What we do
Repair.Reconnect fallen runs, replace crushed sections, seal joints and boots with mastic, re-strap sagging flex.
Reroute.Older homes often have ducts that were added a room at a time with no plan. We look at the layout, figure out where the air needs to go, and rework the trunk and branches so the system can actually deliver it. This is also how we handle renovations and additions.
Replace.When the ducts are rotted, moldy, undersized or made of old ductboard that is falling apart, we replace them. One customer's basement "looked like an octopus lived down there." We moved the unit to the attic, ran new ducts, and the house cools evenly now.
Balance.Dampers and register adjustments so the far bedroom gets as much air as the living room.


Ductwork and indoor air quality
Leaky return ducts pull in crawl space air, along with everything in it. Sealing returns and replacing moldy runs is often the real fix for a house that smells musty.
Indoor air quality →Common questions
How do I know if my ducts are leaking?
Uneven rooms, dust, high bills and a conditioned crawl space are the usual signs. We can test static pressure and inspect the runs.
Can ductwork be replaced in one day?
A typical single-story house, yes. Larger or two-system homes take longer.
Should I replace ducts when I replace the HVAC unit?
If they are undersized, leaking or moldy, yes. Putting a new system on bad ducts wastes most of the efficiency you paid for. We will tell you either way.
Do you work in crawl spaces and attics?
Yes, that is where most ductwork lives.
What kind of duct do you install?
Insulated flex duct for branch runs and metal or ductboard trunks depending on the job, sized for the system.
