Ductwork near you

What your ducts are made of determines how they fail, how they are repaired and whether they can be cleaned. Most houses contain a mix, often with rigid metal trunks feeding flexible branch runs added later.

ENERGY STAR describes several familiar symptoms of duct problems, and homeowners usually recognize their own house in the list before a technician ever arrives.

A duct improvement job starts with finding the leaks rather than guessing: inspecting accessible runs in the attic, crawlspace, basement and garage, checking airflow at registers, and looking for disconnections, crushed flex and missing insulation. Many contractors pressure-test the system to measure leakage before and after the work, which turns a vague promise into a number you can hold them to.

The sealing material matters more than homeowners expect. ENERGY STAR advises sealing leaks with mastic sealant or metal tape, and warns never to use duct tape, as it is not long-lasting. The name is a historical accident: cloth-backed duct tape dries out, the adhesive lets go and the joint reopens, which is why so many older repairs are found hanging loose. For EPA's Indoor airPLUS program, seams in the HVAC cabinet, plenum and adjacent ductwork should be sealed with mastic systems meeting the applicable requirements of UL 181a or UL 181b, or with gasket systems.

Insulating comes after sealing, because insulation over an unsealed joint just hides it. Runs passing through attics, crawlspaces, unconditioned basements and garages are the priority, since that is where the temperature difference is greatest and the leaked air is most thoroughly wasted.

Sealing and insulating is the right answer for most houses. If the layout basically works, the trunks are the right size, and the problems are leaks, torn insulation and a few crushed flex runs, targeted repair delivers most of the available gain without opening ceilings.

Rebuilding becomes the better decision when the design itself is wrong: too few returns, trunks too small for the airflow the new equipment needs, long crushed runs buried in insulation, building cavities serving as returns, or a system extended piecemeal through three renovations until no branch gets its share. ENERGY STAR's quality installation guidance notes that leaky ducts waste energy and can also reduce airflow, resulting in reduced comfort, and that poor system airflow can cause reduced efficiency, higher utility bills, overly damp air, reduced comfort and shortened equipment lifespan. Replacing equipment onto a duct system that cannot carry the air simply moves the problem into the new warranty.

The moment to ask is before new equipment is ordered, not after, because duct changes are far cheaper while the system is already open and the contractor is already on site.

Duct sealing is a common measure in utility efficiency programs, because the savings are reliable and verifiable. Programs are run locally rather than nationally, so what is available depends on your utility and your state, and offers open and close through the year.

ENERGY STAR's Rebate Finder lets you enter your ZIP code to find rebates and special offers near you on certified products from participating sponsors. Check what your own electric and gas utilities offer before booking the work, since many programs require the rebate application to be filed by a participating contractor or require pre-approval before any work starts.

Building and energy codes in the United States are adopted state by state rather than nationally. The Department of Energy's Building Energy Codes Program tracks these adoptions and reviews them against the national model energy codes, the International Energy Conservation Code for residential buildings, which is why duct sealing and duct insulation requirements differ between states and why your contractor should be quoting to the code your jurisdiction actually enforces.

Licensing is equally local. California's C-20 classification explicitly covers the ducts, registers, flues, humidity and thermostatic controls and air filters connected to warm-air heating, ventilating and air-conditioning systems, so duct work there belongs to a licensed C-20 contractor. Texas requires a TDLR license for contractors who install, repair or maintain heating and air conditioning systems. Ask for the license number in your state and confirm whether the work needs a mechanical permit and inspection.

On LokalMatch, you post the duct problem once, describing the rooms that never feel right and where the ducts run, and HVAC pros in your area contact you with their own assessments and quotes. The pros pay to receive those requests. LokalMatch does not do duct work, does not set prices and does not vet, rank or recommend contractors, so verify licensing and insurance yourself before anyone starts cutting metal.