Ductwork Cleaning, Sealing & Repair services in San Francisco
Plenty of shops will quote you a ductwork cleaning, sealing & repair job over the phone without seeing it. That's how you end up overpaying. We don't work that way. Our pricing's flat-rate, our techs are state-licensed, and our trucks have parts on them. Most jobs done the same visit.
What you're paying for
Most homes have leaky ducts losing 20-30% of conditioned air to attics and crawl spaces. Sealing the duct system is the highest-ROI HVAC improvement most homeowners can make.
We test ducts with a blower door + duct blaster, identify leaks, and seal them with mastic (better than tape long-term) or aeroseal injection.
Full duct replacement is rare — only on systems with collapsed flex-duct, severe pest damage, or major redesign needs. More common: targeted replacement of damaged sections plus sealing of the rest.
Fair pricing for this work
For ductwork cleaning, sealing & repair jobs in the San Francisco area:
- Duct leak test (blower door + duct blaster): $350 – $560
- Mastic duct sealing (whole house): $1,060 – $2,250
- Aeroseal injection: $1,750 – $3,500
- Damaged duct section replacement: $425 – $1,500
- Full duct system redesign + replace: $4,250 – $12,250
Notes on San Francisco housing stock
San Francisco has a wide mix of housing — from pre-war brick to last-year new builds. We work on all of it; the diagnostic just takes a different shape.
On bigger jobs we'll bring two techs. On simpler ones, just one — fewer hands, faster billing.
Other things we handle locally
- AC Installation & Replacement in San Francisco
- Mini-Split & Ductless Systems in San Francisco
- AC Repair in San Francisco
- Furnace & Heating Repair in San Francisco