Would You Buy This HVAC Company for $4.2 Million?

Think Like a CFO

Season 1 · Buy It or Pass · Case 1

A growing HVAC company with recurring maintenance revenue is exactly the type of business buyers tend to like. This fictional South Florida case generates $5.4 million in annual revenue, has a meaningful service-plan base, and is presented as producing approximately $1.1 million of annual owner cash flow. The asking price is $4.2 million.

At first glance, the math looks compelling. My problem is not the company. It is what the seller is calling cash flow.

Buying an HVAC business comes down to one question: how much of the seller’s cash flow actually survives the sale? This is a working example of how to value an HVAC business before you buy it: what the seller calls cash flow, what a buyer can actually keep, and what that gap is worth in purchase price. The sequence — normalize the earnings, price the risk, then apply a multiple — is the same one I would use on most owner-operated service companies.

The Deal at a Glance

Metric	Case
Industry	Residential/light-commercial HVAC
Geography	Broward + Palm Beach County, Florida
Years in business	17
Asking price	$4.20M
Annual revenue	$5.40M
Reported EBITDA	$780K
Seller-adjusted earnings	$1.10M
Owner compensation	$240K
Employees	23, including 14 field technicians
Debt	$290K
Cash	$410K
Recurring/service-plan revenue	38%
Largest customer	18% of revenue
Gross margin	43%
EBITDA margin	14.4%
Revenue growth	8%
Near-term fleet/equipment need	~$350K over 24 months
Normal maintenance capex	~$175K/year
Working-capital requirement	~$350K–$450K
Seller reason	Retirement and relocation

Buying an HVAC Business: Why This One Looks Attractive at First

• About $2.05 million of revenue is tied to maintenance and service-plan relationships, which creates more visibility than a pure break/fix operation.
• The business has enough scale to include a real technician base, dispatch infrastructure and management roles.
• Revenue is growing 8% without a dramatic geographic expansion.
• Customer concentration is not catastrophic, and the company has an established operating footprint in South Florida.

Those are real positives. This is not a case where I dislike the company and reverse-engineer reasons to say no. I like the business more than I like the price. That is the discipline buying an HVAC business demands: separate the quality of the company from the quality of the deal.

The $1.1 Million Question: What Does “Cash Flow” Actually Mean?

The seller starts with $780,000 of reported EBITDA, then adds back the owner’s $240,000 compensation, $45,000 of personal vehicle/travel/insurance costs, and a $35,000 one-time legal expense. That gets the presentation to roughly $1.1 million of seller-adjusted earnings.

That is not necessarily dishonest. It is simply answering a different question. The seller is showing how much economic benefit the current owner receives. A buyer has to ask how much earnings will remain after replacing the work the owner performs.

SDE vs. EBITDA

Seller’s Discretionary Earnings, or SDE, is commonly used for smaller owner-operated businesses. It often adds back one owner’s compensation and certain discretionary expenses. EBITDA is a more institutional operating-earnings measure. Neither is automatically “right”; the right metric depends on who the buyer is and what the buyer will have to replace after closing.

Buying the owner’s income is different from buying transferable company earnings.

Which Seller Add-Backs Would I Accept?

Normalized EBITDA is the earnings a buyer believes will remain after removing one-time or personal expenses and adding back the real costs of running the company once the seller is gone — most often a market-rate manager to replace the owner. It is the number a buyer applies a multiple to, and it is rarely the number in the seller’s package.

Adjustment	Amount
Reported EBITDA	$780K
Remove owner compensation	+$240K
One-time legal expense	+$35K
Legitimate personal expenses	+$25K
Replacement GM / operating leader	-$175K
Normalize service-manager compensation	-$70K
Warranty / bad-debt normalization	-$40K
Normalized EBITDA	~$795K

The largest adjustment is not a technical accounting item. It is the cost to replace the seller. If the current owner still handles key commercial relationships, pricing decisions, escalations and day-to-day operating judgment, a buyer cannot simply add the owner’s entire compensation back and assume the business will run itself.

My base case assumes a replacement operating leader costs roughly $175,000 and that another $70,000 is needed to bring a key service-management role to market compensation. I also assume some warranty and bad-debt expense has been understated relative to a normalized year. Those pay assumptions are not arbitrary. The Bureau of Labor Statistics put the median wage for HVAC and refrigeration technicians at $59,810 in May 2024, and supervisory and general-management pay sits well above that.

EBITDA Is Still Not Cash Flow

Even if you accept approximately $795,000 of normalized EBITDA, that is not the amount a buyer can distribute every year. HVAC is an asset-consuming business. Trucks wear out. Tools disappear or break. Installation equipment needs replacement. Growth also creates working-capital pressure because payroll and vendor obligations can arrive before customer cash. Anyone buying an HVAC business has to fund those replacements out of the same earnings the multiple was applied to.

Using roughly $175,000 of normalized maintenance capex, the economics become approximately $620,000 before taxes, acquisition financing and working-capital changes. The buyer may also need $350,000–$450,000 of operating working capital at or shortly after closing.

That does not make the business bad. It means the purchase price should reflect the cash the company can actually produce after maintaining the machine that produces the revenue. This is the same discipline that separates a healthy-looking margin from a real one — a distinction I walked through in this construction pricing case study.

Maintenance Capex: The Number That Makes Me Ask About the Fleet

The seller’s package presents EBITDA. It never reconciles EBITDA to net income. That reconciliation is usually where a CFO learns something, so it is the first thing I would ask for.

Line	Amount
Reported EBITDA	$780K
Depreciation & amortization	~$30K
Interest expense	~$27K
Pretax income	~$723K

At first glance, roughly $30,000 of depreciation looks favorable. Less depreciation means more reported profit, and a buyer scanning the income statement might read it as a sign of a capital-light operation.

In a fleet-heavy HVAC business, I read it as a diligence question instead. This is a 17-year-old company running 14 field technicians. The trucks, service equipment and tooling that produce the revenue are real assets with finite lives. If the annual depreciation charge is only about $30,000, the most likely explanation is not that the company owns very little. It is that much of what it owns may already be heavily or fully depreciated for accounting purposes.

That distinction matters, because depreciation and capital expenditures are not the same thing. Depreciation is an accounting expense that allocates the cost of assets the company already bought. Capex is the cash a buyer will actually spend to keep those assets on the road. A mature fleet can be almost entirely written down on the books and still need to be replaced, and the replacement is paid in cash rather than in accounting entries. The distinction between a deductible repair and a capitalized improvement is set out in IRS Publication 946, and it is exactly the line a fleet-heavy seller tends to blur.

Before I would move on price, I would ask the seller for:

• The fixed-asset register
• Vehicle age by unit
• Mileage by unit
• Original cost of the fleet and major equipment
• Accumulated depreciation against those assets
• The planned replacement schedule

This is also why I normalize approximately $175,000 per year of maintenance capex rather than treating reported depreciation as a proxy for it. It is consistent with the roughly $350,000 of fleet and equipment needs the business is already facing over the next two years. A low depreciation charge does not reduce that bill. If anything, it suggests the bill is closer than the income statement implies.

None of this means the assets are failing. It means the seller’s earnings presentation and the company’s cash requirements are describing two different things, which is the same conclusion the add-back analysis reached from a different direction.

What I Would Pay: My HVAC Business Valuation Range

Scenario	Normalized EBITDA	Multiple	Indicated value
Conservative	$795K	4.0x	$3.18M
Base	$795K	4.25x	$3.38M
Strong diligence	$795K	4.5x	$3.58M
Asking price	$795K	5.28x	$4.20M

I would think about this case in a range of roughly $3.2 million to $3.6 million, not as a single “correct” value. The upper end becomes easier to defend if service-plan retention is excellent, the owner is already largely removed, technician turnover is low, the fleet is in better condition than assumed, and the concentrated customer relationship is durable and transferable. That range, not the asking price, is what buying an HVAC business is worth here on the numbers as presented.

At $4.2 million, the buyer is paying the premium before proving those items. That is backwards.

HVAC Financial Due Diligence: What I Would Request

• Service-agreement retention and cancellation data by cohort
• Revenue and gross margin by installation, service and maintenance
• Three years of revenue by customer to understand concentration trends
• Technician productivity, turnover and overtime
• Call conversion and callback/warranty history
• Fleet age, mileage, maintenance and replacement schedule
• Detailed payroll and the owner’s actual weekly responsibilities
• A/R aging and bad-debt history
• Monthly working-capital balances through a full year
• Evidence that key commercial relationships will transfer

If you are running this analysis on a live deal rather than a case study, that list is essentially the scope of buy-side financial analysis — quality of earnings, normalized EBITDA, working capital requirements, and a CFO review before you sign an LOI.

CFO Verdict: Pass at $4.2 Million

At $4.2 million, I would pass. Around $3.4 million to $3.5 million, with clean diligence, I would become interested.

1. The seller-adjusted $1.1 million overstates what I believe transfers to the buyer.
2. Fleet replacement and working-capital needs materially change the economic cash flow.
3. The asking price already assumes excellent operating quality before the buyer proves it.

A good company can still be a bad acquisition. The discipline is not finding a reason to hate the business; it is paying a price that leaves room for the risks you have not eliminated yet. Buying an HVAC business well is mostly an exercise in refusing to pay for earnings that leave with the seller.

If You Are the Owner, Not the Buyer

This analysis matters even if you have no intention of selling your HVAC company. The same issues that reduce acquisition value are usually the same issues that make ownership harder: owner dependence, weak service-line reporting, unplanned fleet replacements, poor working-capital forecasting and unclear margins.

An owner who can answer these questions monthly is running a more financeable, more resilient and ultimately more valuable company. You should know how much EBITDA remains after paying market compensation for management. You should know which service line actually earns the margin. You should know when the fleet will require replacement and whether cash is being reserved for it. You should know how much working capital growth consumes before it creates distributable cash.

That is CFO work. It is not just reporting what happened last month; it is making sure today’s profit can support tomorrow’s decisions. It is also the substance of our fractional CFO services — the monthly discipline of turning financial data into decisions.

There is a second case that runs this same math from the other side of the table: an owner who believes his HVAC business is worth $10 million, and a buyer who offers $7 million. For the seller’s view of the same adjustments, read why a $10 million HVAC business drew a $7 million offer.

Frequently Asked Questions

How are HVAC businesses valued?

Smaller owner-operated HVAC businesses are often discussed using SDE, while larger businesses are more commonly analyzed using EBITDA. The multiple depends on scale, management depth, recurring revenue, customer concentration, growth, labor quality, capex and transferability.

What is the difference between SDE and EBITDA?

SDE typically adds back one owner’s compensation and discretionary expenses. EBITDA is closer to operating earnings before financing, taxes and non-cash depreciation/amortization. Buyers must still normalize management costs under either approach.

Is recurring HVAC maintenance revenue more valuable?

Usually, because it can improve visibility and retention. The premium depends on renewal rates, margins, customer concentration and whether the agreements transfer.

What seller add-backs should buyers question?

Any add-back that will recur after closing should be challenged. Owner salary can be added back only to the extent the buyer does not need to replace the owner’s work.

Does a buyer need working capital in addition to the purchase price?

Often yes. Payroll, vendors and receivables create cash timing needs that continue after closing.

Is EBITDA the same as cash flow?

No. EBITDA ignores capex, debt service, taxes and working-capital movements, all of which can materially affect cash.

Is a lower multiple always a better deal?

No. A low multiple usually prices a real problem — owner dependence, deferred fleet replacement, customer concentration, or earnings that will not survive the seller’s exit. A higher multiple on durable, transferable earnings can be the cheaper purchase once capex and working capital are funded.

What should I check first when buying an HVAC business?

Start with the earnings, not the multiple. Rebuild the seller’s cash-flow figure into normalized EBITDA by removing add-backs that recur after closing — replacement management above all — then subtract maintenance capex to see what the business actually distributes. In this case that sequence took $1.1 million of seller-adjusted earnings down to roughly $620,000 of cash before taxes, financing and working capital. Only then does a multiple mean anything.

Related Reading

• Think Like a CFO — the full case series
• Fractional CFO services for South Florida businesses
• What a fractional CFO costs and our flat monthly pricing
• Markup vs. margin: a $1.3M pricing error in a construction management business
• About David Lopez, CPA
• Case 4: When reported earnings stop meaning what they say