How much is an air duct cleaning business worth?

Short answer: around 2× seller's discretionary earnings (SDE) for a typical duct cleaning operation — about $243,000 on $121,600 of SDE in the example below. Honest framing up front: this trade rarely sells as a standalone empire. It sells as a route, a truck, and a referral engine — often to an HVAC company that wants the customer list. Price yours with the valuation calculator and see the trade's full picture on our air duct cleaning industry page.

The number

There is no published, trade-specific realized multiple for air duct cleaning — BizBuySell's trailing-five-year dataset (Q3 2021–Q2 2026) does not break it out, so this page runs on category data and says so. The frame is the IBBA Market Pulse ladder (Q2 2026): 2.0× SDE under a $500K price, 2.8× at $500K–$1M, 3.1× at $1M–$2M, 4.8× EBITDA at $2–5M.

A worked example (margin is an assumption):

• Revenue: $380,000
• SDE margin, assumed: 32% → SDE = $380,000 × 0.32 = $121,600
• IBBA ladder at this size: 2.0× → $121,600 × 2.0 = $243,200

Watch the asset trap: a negative-air machine, a compressor, and a camera system might cost $40,000–$60,000 new, but in a sale they are worth what a used-equipment buyer pays, and the earnings multiple already assumes working equipment. The public-comp proxy — large Business & Consumer Services companies at 14.26× EV/EBITDA (Damodaran Online, January 2026) — prices diversified platforms, not a trade where a homeowner needs you once every five years. Buyers pay for transferable demand, and they discount everything else.

How buyers actually value an air duct cleaning business

Buyers ask one question first: where does the work come from? Duct cleaning demand is episodic — post-renovation, new baby, allergies, a coupon — so the transferable asset is rarely the customer list itself. It is the referral plumbing: contracts or standing relationships with HVAC companies that hand you their install customers, property managers with turnover volume, and restoration firms that need duct work after fires. A buyer from HVAC will pay for your list differently than a buyer from nowhere: to them, every duct job is also a maintenance-plan lead and a future system replacement, so your revenue is worth more inside their shop than standing alone. They also check NADCA membership and ASCS-certified techs — certification is one of the few trust signals in a trade polluted by $99 bait-and-switch operators — and whether your average ticket reflects full-system cleaning plus sanitizing and dryer-vent add-ons, or whole-house specials that barely cover fuel.

What raises the price — and what kills it

Raises it:

• Standing referral agreements with HVAC installers and property managers, in writing
• Commercial duct work — restaurants, clinics, schools — on scheduled cycles
• NADCA membership, ASCS-certified techs, before-and-after camera proof on every job
• Average ticket built on add-ons (sanitizing, dryer vent, coil cleaning), not discounts
• Dryer-vent routes for condo and HOA communities — the one genuinely recurring line in this trade

Kills it:

• The $99 whole-house special as the whole business model — no margin to sell
• Revenue from one HVAC partner who can take the work in-house any quarter
• No database: past customers unmarketable because nobody kept emails or service dates
• Equipment at end of life, with the buyer pricing in a full re-rig
• Reviews full of bait-and-switch complaints — in this trade, reputation is the moat or the hole

Move your number

Your levers are about making episodic demand behave like recurring revenue. Collect like a grown-up: deposits on booking and card-on-file for property-manager accounts end the chase-the-check routine and trim processing waste — the Finix payments team is the route we send owners to for that. Systematize the rebooking: a 3-to-5-year service-due reminder, post-job review asks, and referral-partner follow-ups that run on their own are an operations build — ClaroPro's lane. Make the referral engine visible: when partner sources, job history, and service-due dates live in a real system instead of your texts, a buyer can see the demand machine they are purchasing; a Nova engineering team builds that when spreadsheets stop cutting it. Start with your own baseline: run the calculator.

Call this what it is: an educational framework with shown math, not an appraisal of your trucks and routes. The caveats are not there to protect us — they protect you, the owner, from overpaying for a list of one-time customers dressed up as a book, or underselling referral relationships that took years to build. A real price is set by a real buyer on a specific day — in this trade, usually the HVAC owner across town who already knows exactly what your list is worth to him.