San Antonio ductwork cleaning, sealing & repair
Whether you saw water on the floor or just heard a drip, what happens in the next 30 minutes matters. Stop reading and call if it's the first one. We're licensed, insured, and direct. No upselling, no door-to-door pitches, no hour-long sales appointments.
Talk to a tech: (800) 555-3072
Local context for San Antonio
If you're inside the city limits, we're typically there inside an hour during business hours. Outside the metro, plan on a bit longer.
Most of our San Antonio ductwork cleaning, sealing & repair jobs come from older neighborhoods, where the housing stock just has more failure points.
Scope of work
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.
What it costs
For ductwork cleaning, sealing & repair jobs in the San Antonio area:
- Duct leak test (blower door + duct blaster): $260 – $415
- Mastic duct sealing (whole house): $780 – $1,655
- Aeroseal injection: $1,290 – $2,575
- Damaged duct section replacement: $315 – $1,105
- Full duct system redesign + replace: $3,130 – $9,015
Recent service example
A San Antonio customer in their original to home home had been chasing upstairs always 6-8° hotter than downstairs for weeks before calling. Crushed flex duct in attic and 30% leakage was the actual cause. We replaced damaged section, sealed remaining ducts, added zone damper, temperature differential dropped to 1-2°; everything stable since. About $262 all in.