We will not tell you every home needs duct cleaning. Many Fremont homes do not. What we see more often are ducts that are crushed, disconnected or leaking into the attic or crawlspace, quietly wasting 20 to 30 percent of the air you pay to heat and cool. We inspect first and recommend the fix that actually helps.
When duct cleaning makes sense
- After a remodel, drywall work or flooring sanding
- Signs of rodents or insects in the duct system
- Visible mold growth in ducts or on registers
- After several heavy wildfire smoke seasons
- Moving into a home where the history is unknown
Duct sealing and repair
Flex ducts in Fremont attics from the 1980s and 90s are often sagging, torn or pulled off their boots. Repairing and sealing them improves airflow to the far bedrooms and lowers bills. Duct sealing is also often required when you replace equipment, so we include testing with every furnace replacement.
What a cleaning includes
- Camera inspection and photos before we start
- Negative-pressure vacuum connected to the trunk line
- Agitation of every supply and return run
- Register and grille cleaning
- Blower and coil inspection, filter replacement
- Photos after cleaning so you can compare
Typical costs in Fremont
| Job | Typical range |
|---|---|
| Whole-home duct cleaning | $450–$900 |
| Duct sealing (aerosol or mastic) | $800–$2,500 |
| Duct repair, per run | $150–$450 |
| Full duct replacement | $6,000–$12,000 |
Ranges reflect recent Fremont-area jobs and change with equipment, access and parts. You get an exact, written price before any work starts.
Looking for more than one fix? ComfortFlow is a full-service HVAC company in Fremont, so one call covers heating, cooling and hot water.