HVAC Duct Cleaning Proposal — What Homeowners Expect to See
How to write a duct cleaning proposal that meets homeowner expectations. Includes pricing, scope of work, and before/after documentation.
Duct cleaning is one of the most competitive services in the HVAC industry. Homeowners are bombarded with $99 whole-house specials from companies that cut corners, and they have learned to be skeptical. A professional, transparent proposal sets you apart from the low-ball operators and helps justify a fair price.
This guide covers what homeowners actually expect to see in a duct cleaning proposal, how to structure your line items, and how to upsell related services without being pushy.
Why Homeowners Hire Duct Cleaners
Understanding the homeowner's motivation helps you tailor the proposal to their concern. Most duct cleaning calls come from one of these triggers:
- Allergies or respiratory issues — dust, mold, or pet dander circulating through the home
- Visible dust or debris coming from supply registers
- Recent renovation or construction that pushed drywall dust and debris into the duct system
- New home purchase — buyers want to start fresh in a clean home
- Musty or stale odors when the system runs, especially after a long period of disuse
- Pest evidence — droppings, nesting material, or dead insects found in or near registers
When your proposal acknowledges their specific concern and explains how your process addresses it, you build trust before they even look at the price.
What Homeowners Want in a Duct Cleaning Proposal
After years of dealing with bait-and-switch duct cleaning companies, homeowners have developed a clear set of expectations. Your proposal should address each of these:
Clear scope of work — exactly which vents, returns, and trunk lines are included
All-in pricing — no surprise charges for additional vents or mold treatment once on site
Method explanation — whether you use rotary brush, air whip, compressed air, or negative pressure
Time estimate — how long the job will take so they can plan their day
Credentials — NADCA certification, insurance, and any relevant licensing
Pro Tip
Include a brief paragraph explaining your cleaning method and equipment. Homeowners cannot judge duct cleaning quality in advance, so they rely on your explanation to gauge professionalism. Read our guide to sending professional quotes for more formatting advice.
Key Line Items
Here are the core line items that belong on every duct cleaning proposal, with typical pricing ranges for a standard residential job.
| Line Item | Description | Typical Price |
|---|---|---|
| Supply Vent Cleaning | Per vent, includes register removal and brush/vacuum | $25 - $40/vent |
| Return Vent Cleaning | Per return, larger opening, more debris typically | $35 - $50/return |
| Main Trunk Line | Supply and return trunk, negative pressure vacuum | $150 - $300 |
| Sanitizing Treatment | EPA-registered antimicrobial fogger applied to duct system | $100 - $250 |
| Dryer Vent Cleaning | Rotary brush from dryer to exterior exhaust | $100 - $175 |
| Blower Motor & Housing | Clean blower wheel and housing interior | $75 - $150 |
| Evaporator Coil Cleaning | Foam or no-rinse coil cleaner application | $100 - $200 |
For a typical home with 12 supply vents, 3 returns, and the main trunk line, a thorough duct cleaning without add-ons runs $450 to $750. With sanitizing and dryer vent, the total reaches $650 to $1,100.
Before/After Documentation
One of the strongest trust signals in a duct cleaning proposal is promising before and after photos or video. This immediately separates you from companies that show up, run a vacuum for 20 minutes, and leave.
In your proposal, include a statement like: “We document the condition of your ductwork before and after cleaning using an in-duct camera. You will receive photos showing the results of our work.”
The cost of a duct inspection camera has dropped significantly. A decent borescope that connects to a phone costs $50 to $150 and pays for itself on the first job by building customer confidence. Some contractors record short video clips and text them to the homeowner while on site.
Pro Tip
Before/after photos are also powerful marketing material. Ask the homeowner if you can use the images (with their permission) on your Google Business Profile or website. Visual proof of dirty ductwork drives more inbound calls than any ad.
Pricing Strategies: Per Vent vs Flat Rate
There are two main pricing models for duct cleaning. Each has trade-offs, and the right choice depends on your market and business model.
Per-Vent Pricing
Charging per vent ($25-$40 per supply, $35-$50 per return) is transparent and fair. Homeowners can count their own vents and estimate the cost before you arrive. The downside is that small homes with few vents may not hit your minimum profitability threshold. Many contractors set a minimum job size of $350 to $450 to account for travel, setup, and equipment time.
Flat Rate Pricing
A flat rate based on home size or system count simplifies quoting. For example: $449 for homes up to 2,000 sq ft with one system, $649 for homes up to 3,500 sq ft. This approach is easier to market and quote over the phone, but make sure your flat rate accounts for the range of vent counts you will encounter.
Whichever model you choose, always specify exactly what is included and what costs extra. The number one complaint about duct cleaning companies is unexpected charges for services the homeowner assumed were included. Our free HVAC proposal template includes a clear scope of work section for this purpose.