What matters most
- Current 2026 consumer cost guides commonly place supply-vent cleaning around $25 to $50 per vent, with about $35 often used as a planning midpoint.
- Return vents can be priced differently and may cost more than supply registers.
- Per-vent math is a planning tool, not proof of the final whole-system price.
Quick per-vent cost table
The table below applies a $25 to $50 per supply-vent planning range. It is simple arithmetic, not a promise that a contractor will price the job this way.
| Supply vents | Low planning amount | High planning amount |
|---|---|---|
| 8 | $200 | $400 |
| 12 | $300 | $600 |
| 16 | $400 | $800 |
| 20 | $500 | $1,000 |
What actually counts as a vent?
Homeowners often count every grille as the same thing, but a forced-air system has supply registers that deliver conditioned air and return grilles that pull air back toward the equipment. Some contractors count both together. Others quote supply vents and returns separately.
- Count supply registers room by room
- Count return grilles separately
- Write down the number of HVAC systems
- Ask whether the main supply and return trunks are included
Why return vents can change the math
This Old House currently publishes a $25 to $50 range for supply vents and a higher $40 to $75 range for return vents. That is a good reminder that multiplying every grille in the house by one number can oversimplify the job.
When per-vent pricing becomes misleading
A per-vent number can look cheap while leaving out the main trunk lines, return side, plenums, equipment cabinet, or a second HVAC system. It can also look expensive compared with a contractor who prices the entire system as one package. The only fair comparison is scope against scope.
- Minimum service charges
- Separate return pricing
- Separate trunk-line charges
- Second-system charges
- Difficult access
- Heavy contamination
- Blower, coil, sanitizer, or dryer-vent add-ons
Best way to use per-vent pricing
Count your supplies and returns before you request estimates, then use the estimator to build a planning range. When the contractor quotes the job, compare the written total with the vent count and ask what components are included. That gives you a much stronger comparison than shopping by one advertised per-vent number.
Common questions
Is $35 per vent a normal air duct cleaning price?
About $35 per supply vent is a common planning midpoint in current consumer cost guides, with published ranges often around $25 to $50. Actual quotes can use different pricing structures.
Do return vents count in air duct cleaning quotes?
They should be addressed in the scope, but they are not always priced the same way as supply vents. Ask the contractor to list supply vents and returns separately.
How many vents does a typical house have?
There is no reliable universal count because floor plan, HVAC design, additions, and system zoning vary. Counting the actual registers in your home is better than using a generic house-size assumption.
Can a contractor charge a flat rate instead of per vent?
Yes. A flat whole-system price can be easier to compare if it clearly states the number of systems and which ducts and components are included.
Sources and methodology
We use current consumer cost references for price ranges and primary EPA or NADCA guidance for safety, cleaning scope, and homeowner precautions when available. Published prices are planning benchmarks, not contractor quotes.
Keep going
These guides answer the next questions homeowners usually hit when comparing a duct-cleaning quote.
Price the actual job, not the headline number.
Use your vent count and ZIP to build a planning range, check researched local benchmarks, then compare nearby contractor options.