Buying HVAC Companies

Short answer: Most owners start with a target and work backward to a reason. In HVAC that gets expensive, because the two halves of this business behave completely differently. Installs are low margin and eat working capital. Service is high margin with excellent cash flow, and it is constrained by technicians rather than demand. Before you look at a single target, you need to know which of those you are buying and why.

The consolidation math, the platforms you are competing against, and how these deals typically get structured are covered in buying home services companies. What follows is specific to HVAC.

The economics of the trade

An HVAC company is two businesses in one P&L.

Install is a low margin, working capital heavy business. You carry material, you carry labor, and on the construction side you wait on draws. Nobody gets rich installing equipment.

Service is a high margin annuity with excellent cash flow. You get paid at the truck. The maintenance agreements renew. The margins are multiples of what install produces.

The mistake is treating install as a bad business you tolerate. It is not. Install is how you buy the annuity. Every system you put in is a customer you will service for the next fifteen years, and the replacement at the end of that cycle is yours to lose.

That is why the install base is the thing worth buying, even when the install business itself looks unimpressive on paper.

The constraint on the service side is not demand. It is technicians. You cannot hire your way into a service business right now, which is exactly why buying one makes sense, and it is why the crew is the asset in any deal you look at.

So what is your thesis?

Four questions, and the answer determines what you should be buying. The full treatment, with the tradeoffs on each, is on buying home services companies. Framed to HVAC:

Should I buy another residential HVAC service company in my market?If you are strong in residential service in a defined territory, another residential service book in the same market is the lowest risk play. Route density improves and your existing overhead absorbs more revenue.

Should I expand into plumbing or electrical instead? Adding plumbing or electrical sells more to the install base you already paid to acquire. The target is not another HVAC company at all.

Should I move into light commercial? Different sales cycle, different collections, contracts instead of calls. It diversifies you away from homeowner discretion, but you may be running a business you have not run before, so the acquired management matters more.

Should I expand into a new geography? The hardest of the four. It works when the acquired company comes with a general manager who stays, and fails when you assume you can run it from the truck.

Write the answer down before you look at targets. A written thesis is worth most for what it lets you say no to.

What to look at in diligence

The revenue split. A company that is seventy percent new construction is worth materially less than one that is seventy percent service, at identical revenue. Look at the mix before you look at the multiple.

The maintenance agreement base. This is the asset, and it is the number sellers inflate most reliably. Ask for the count, then ask what percentage renewed last year, what the average agreement is worth, and how many are on autopay. A thousand agreements where four hundred lapsed is not a thousand agreements.

The refrigerant transition, which most buyers are missing this year.Manufacturing of R-410A equipment ended January 2025 and the sell-through period closed January 2026. New residential installations now use A2L refrigerants, mostly R-454B and R-32.

Three things follow when you are buying a company in 2026. Any remaining R-410A equipment inventory on their balance sheet may be worth less than the number in the file. R-454B has been in short supply, with cylinder prices up more than 300 percent since 2021, so their material cost line may not reflect what you will actually pay. And every technician needs current A2L certification, plus the trucks need A2L-rated tools and detection equipment. If the seller has not done that training, it is a real cost that lands on you in the first ninety days.

Ask for the certification records. Almost nobody does, and the answer tells you a great deal about how the company has been run.

The technicians. You are not buying trucks. You are buying the crew that knows the customers, and in a market where nobody can hire techs, that crew is the whole asset. Find out who is licensed, who holds the customer relationships, and what happens to them when the owner leaves. Structure the deal so the answer is what you need it to be.

Should I buy another HVAC company, or keep growing on my own?

If you already run a profitable HVAC business and you have the systems and people to absorb more volume, buying another company is usually the faster path than adding customers one call at a time. The install base you acquire feeds service revenue for the next decade, and you are buying technicians you could not otherwise hire. The test is whether your core business is stable enough to take on the integration. If it is, acquisition compounds in a way organic growth cannot. See the full breakdown in organic vs acquisition growth.