How much is an HVAC business worth?

Short answer: realized sales put HVAC businesses at 2.83× SDE — the cash the business throws off for one working owner. But HVAC is really two businesses: the agreement base that renews every year, and the install work that has to be re-won every month. Buyers price them very differently, and the mix explains most of the spread between offers. The math is below, line by line. See the HVAC page, then run your own numbers in the valuation calculator.

The number

The realized data first. BizBuySell's industry valuation multiples, from closed sales over the trailing five years (Q3 2021 through Q2 2026), put HVAC businesses at 2.83× SDE and 0.60× revenue — trade-specific data. Size then moves the multiple more than almost anything: the IBBA Market Pulse size ladder (Q2 2026) runs 2.0× SDE for prices under $500K, 2.8× at $500K–$1M, 3.1× at $1M–$2M, 4.8× EBITDA at $2–5M, and 5.8× EBITDA at $5–50M. And the ceiling anchor: public companies in Business & Consumer Services trade at 14.26× EBITDA (Damodaran Online, January 2026). No public HVAC contractors of your size exist — that figure is a labeled proxy for the buyer's opportunity cost, not a price for your shop.

Worked example. Assume, as an assumption to replace with your books: revenue of $1,500,000 and an SDE margin of 20%. Line by line: $1,500,000 × 20% = $300,000 of SDE. Apply the realized multiple: $300,000 × 2.83 = $849,000. That is the starting estimate — roughly $849K — before the agreement count and revenue mix push it up or down.

How buyers actually value an HVAC business

Buyers start with the maintenance agreement base: how many agreements, at what price, renewing at what rate. Agreements do three jobs at once — they fill the slow shoulder seasons, they put your tech in front of aging equipment first, and they feed the replacement pipeline, because the customer with a 14-year-old system and a service plan calls you when it dies. An agreement base is the closest thing HVAC has to a subscription book, and buyers underwrite it almost like one.

Next, the revenue mix. Service and repair carries the best margin and the least competition. Replacement and install is good project money driven by your installed base. New construction is discounted hard — bid-priced, builder-dependent, cyclical. Buyers also check dealer status with your equipment brands, NATE or equivalent certifications on the crew, callback rates, and the age profile of the systems you have installed: a young installed base is a decade of service work already sold.

What raises the price — and what kills it

Raises it:

• A large, documented agreement base with renewal rates you can prove from the system, not from memory.
• Service and replacement revenue dominating the mix, with new construction as the side dish, not the meal.
• A service manager and an install lead, so the business runs in July without you on a roof.
• Clean separation of revenue lines — service, agreements, install, construction — so a buyer can price each one.

Kills it:

• New construction at 40% or more of revenue, owed to two builders.
• You are the top tech, the comfort advisor, and the dispatcher. Buyers discount key-person risk ruthlessly.
• One hot summer doing the heavy lifting in your three-year numbers — buyers normalize weather spikes out.
• Agreements that exist as a handshake list, with no prices, dates, or renewal history to transfer.

Move your number

First, profitability per job: card fees on $15,000 system replacements and slow collections on install balances eat SDE that is worth 2.83× at sale. The Finix payments team works on deposits at signing, ACH on the big balances, and card-on-file for agreement renewals. Second, the agreement base: every install that leaves without a service plan is recurring revenue you chose not to own. Follow-up, renewal reminders, and answering the phone in the first heat wave are operations the ClaroPro team builds with AI, so agreements grow without you hiring a second dispatcher. Third, proof: agreement counts, renewal history, and revenue by line in a system a buyer can pull reports from — a build a Nova engineering team can do on top of the tools you already run. Then check the result: the calculator, prefilled for HVAC.

This is an educational framework with the math shown, not an appraisal and not a statement of fair market value. A real price is set by a real buyer on a specific day, after diligence on your actual agreement base and books. Read the caveats as protection for you, the owner: they keep you from paying a service-business price for a construction business, from underselling a real agreement base, and from signing against numbers a buyer will re-cut later anyway. Never invent. Show the math. The owner is who this page works for.