Selling an HVAC business means navigating a world full of M&A terminology that most HVAC operators have never needed to know. But when a buyer's attorney starts using these terms in negotiations, you need to understand them — because the definitions carry significant financial implications.
This glossary covers the 15 most important terms every HVAC owner should understand before entering a sale process. For deeper coverage of any topic, click through to the full article in our complete HVAC sale guide.
Seller's Discretionary Earnings (SDE)
The total financial benefit a single full-time owner-operator receives from the business annually. SDE = net income + owner's salary + owner's perks + non-cash expenses + one-time expenses. Used to value smaller HVAC businesses (typically under $1M in earnings) where the owner works in the business. SDE-based valuations are common for businesses sold to individual operators and search fund buyers.
EBITDA
Earnings Before Interest, Taxes, Depreciation, and Amortization. The standard valuation metric for HVAC businesses generating over $500K in annual earnings and selling to institutional buyers. EBITDA approximates the operating cash flow of the business before financing and tax decisions. Normalized EBITDA adds back personal and non-recurring expenses to produce the number buyers actually pay multiples on.
Add-Backs (Adjustments)
Expenses or items that are added back to net income to calculate normalized EBITDA or SDE. Common HVAC add-backs include: above-market owner compensation, personal vehicle expenses, family member salaries, non-recurring legal or accounting fees, and one-time equipment purchases. Well-documented add-backs are fully valid; poorly documented ones are discounted or excluded by buyers.
EBITDA Multiple
The number multiplied against annual EBITDA to arrive at a business's value. If a business produces $700K in EBITDA and is valued at a 5.5x multiple, the enterprise value is $3.85M. HVAC businesses typically trade at 3.5–8x EBITDA depending on size, recurring revenue percentage, and growth profile. The multiple is the single most sensitive variable in HVAC valuation.
Letter of Intent (LOI)
A non-binding document from a buyer expressing their intent to purchase an HVAC business at a specified price under specified terms. The LOI outlines the key deal parameters (price, structure, earnout, exclusivity period, seller role). While price and most terms are non-binding, the exclusivity and confidentiality provisions typically are binding. The LOI is the most important negotiating opportunity in the sale process.
Exclusivity Period
The time period, triggered by signing an LOI, during which the seller agrees not to solicit or discuss the sale with other potential buyers. Typically 45–90 days. This protects the buyer's investment in due diligence by preventing the seller from using their offer to generate a competing bid. Sellers should push for the shortest exclusivity period possible and negotiate extension conditions carefully.
Due Diligence
The comprehensive investigation a buyer conducts of an HVAC business after signing an LOI and entering exclusivity. Due diligence covers financials (3 years of tax returns, P&Ls, bank statements), operations (technician roster, fleet, software, customer concentration), legal (licenses, leases, contracts, litigation history), and HR. The due diligence period typically takes 30–90 days depending on business complexity and buyer experience.
Quality of Earnings (QoE)
A formal financial analysis, typically conducted by an independent accounting firm hired by the buyer, that verifies and validates the seller's reported earnings. The QoE report scrutinizes add-backs, revenue recognition policies, customer concentration, and EBITDA trends. For HVAC businesses over $3–5M in value, a QoE is standard. Sellers can commission their own sell-side QoE before going to market to identify issues in advance.
Working Capital Peg
The target amount of working capital (current assets minus current liabilities) that must remain in the HVAC business at the time of closing. If the business's actual working capital at close is above the peg, the seller receives the surplus; if below, the purchase price is reduced by the shortfall. The working capital peg is set during LOI negotiation and is one of the most commonly contested terms in HVAC M&A.
Asset Sale
A deal structure in which the buyer purchases specific assets of the HVAC business (equipment, vehicles, customer lists, goodwill, trade name) rather than purchasing the company's equity. The seller retains the legal entity. Asset sales are preferred by buyers because they receive a full step-up in tax basis on the acquired assets. Most HVAC business sales under $10M are structured as asset sales.
Stock Sale
A deal structure in which the buyer purchases the seller's equity shares in the HVAC company, acquiring the business entity itself (with all its assets and liabilities). Stock sales result in all-capital-gains tax treatment for the seller (lower tax rate) but no tax step-up for the buyer, which is why buyers generally resist them. More common in larger deals or when the C-Corp structure makes a 338(h)(10) election advantageous.
Earnout
A contingent payment structure in which a portion of the purchase price is paid to the seller in the future based on the business achieving specific performance targets (revenue, EBITDA, maintenance agreement counts) after closing. Earnouts bridge valuation gaps between buyers and sellers but carry significant execution risk for sellers since the buyer controls post-close operations. Revenue-based earnouts are generally more seller-friendly than EBITDA-based earnouts.
Seller Note (Owner Financing)
A promissory note in which the HVAC business seller lends a portion of the purchase price to the buyer, receiving principal and interest payments over 3–7 years. Seller notes are common in SBA-financed deals (where they're often required) and when buyers have capital gaps. Sellers should always require a security interest in business assets, personal guarantee, and financial reporting rights as conditions of carrying a note.
Recapitalization (Recap)
A transaction in which a minority investor (typically a growth equity partner) purchases a partial ownership stake in an HVAC business — typically 20–40% — while the owner retains majority control. The owner receives partial liquidity at current valuation, gains a strategic partner who drives growth, and retains a larger stake in a more valuable future exit. Recaps are increasingly popular for HVAC owners who want to grow before selling rather than exit immediately.
Non-Compete Agreement
A contractual agreement by the HVAC business seller not to compete with the acquired business for a defined period (typically 2–5 years) within a defined geography (typically the seller's current service area). Non-competes are standard in HVAC acquisitions and typically constitute separate taxable income (ordinary income treatment) for the seller. Sellers should negotiate the narrowest geographic scope and shortest duration that satisfies the buyer.
You Know the Terms. Now Let's Talk About Your Business.
Understanding the terminology is the foundation. Applying it to your specific situation — what your real EBITDA is, what multiple you should expect, and whether selling now or building first is right for you — is the conversation worth having. No pitch, no pressure.
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