Ductwork Repair & Airflow Balancing
Older multi-story residences in Brown's Addition and the South Hill frequently suffer from starved second-floor supply runs, while mid-century ranch layouts in the Garland District often lose thermal energy through…

- Comprehensive service includes static pressure testing, duct joint mastic sealing, broken run repairs, supply plenum inspection, and manual damper balancing across all registers.
- Initial diagnostic evaluations and single-duct repairs typically take two to four hours, while whole-house balancing projects conclude within one business day.
- Diagnostic and minor repair services start at our $200 service minimum, with full-home sealing and balancing ranging from $450 to $2,400 depending on crawlspace and attic access.
- We service rigid sheet metal trunk lines, flexible insulated ducts, fiberglass duct board, return air plenums, and floor-to-ceiling supply branches.
- Schedule an on-site evaluation by calling (253) 559-8101 to verify system airflow and receive an honest, itemized quote based on physical inspection.
Older multi-story residences in Brown's Addition and the South Hill frequently suffer from starved second-floor supply runs, while mid-century ranch layouts in the Garland District often lose thermal energy through uninsulated basement crawlspaces. When supply ducts pull apart or leak conditioned air into unconditioned attics, furnaces run longer cycles during sub-zero December freezes, driving up winter utility costs. During summer heat waves and regional wildfire events, loose return duct joints actively pull unconditioned attic air and airborne particulate into your living spaces instead of circulating filtered air.
Airflow balancing corrects uneven room temperatures by measuring CFM output at individual registers and adjusting manual branch dampers to match the cubic footage requirements of each room. In split-level layouts found across Five Mile Prairie and Indian Trail, standard furnace operation often leaves lower daylight basements frigid while upper bedrooms overheat. Repairing separated sheet metal boots and recalibrating duct airflow addresses these temperature deltas directly at the distribution level, avoiding premature equipment replacement when the central furnace or heat pump is functioning properly.
What it costs
Every job gets a firm, written price after a free on-site visit.
Common questions
How do I know if my Spokane home needs duct repair rather than a new furnace?
Can repairing ductwork help keep wildfire smoke out of my Spokane house?
Why are upper floors colder in winter and hotter in summer across Spokane multi-story homes?
How long does a standard duct sealing and balancing visit take in Spokane County?
What is the minimum cost for ductwork evaluation services in Spokane?
Ready to get started?
Tell us about your ductwork repair & airflow balancing job in spokane and we'll send a clear, written quote — usually the same day.
Evergreen air HVAC