What PE Firms Actually Look at Before Making an Offer on Your HVAC Company

The real evaluation framework PE firms use for HVAC acquisitions: revenue stability, revenue quality, owner dependency, technician retention, and more.

You are getting the calls. Maybe it started a year ago, maybe it was last month. A polite voice on the other end introduces themselves as a business development associate from a private equity platform and asks if you have ever thought about selling your HVAC company. Maybe you hung up. Maybe you listened. Either way, you have the same question every HVAC owner has when PE comes knocking: what are they actually looking for?

The evaluation framework PE firms use is not a mystery, but most owners do not learn about it until they are already in a due diligence process and it is too late to improve their positioning. This article walks through the actual criteria that PE firms use to evaluate HVAC acquisition targets. Not the generic advice about cleaning up your books. The real framework, weighted by how much each factor moves the needle on your multiple and your deal terms.

The Six Factors That Determine Your Offer

Every PE firm has its own proprietary scorecard, but after enough of these deals, the pattern becomes clear. They are all evaluating the same six dimensions. The difference is how much weight they assign to each one based on their portfolio strategy and investment thesis. Here is the framework.

Sources: Capstone Partners HVAC Services M&A reports, 2024-2025; PKF O'Connor Davies US HVAC M&A Industry Update, Summer 2025; Forbes Partners Commercial HVAC M&A Analysis, Q3 2025; ACHR News PE and HVAC reporting, 2024-2025.

The combined effect of these factors can mean the difference between a 3x multiple and a 7x multiple on the same EBITDA. That is not an exaggeration. A $2 million revenue HVAC company with $300,000 in EBITDA could be worth $900,000 or $2.1 million depending on how it scores across these six dimensions.

Revenue Stability: The Foundation of Every Evaluation

PE firms are using investor money to generate returns. Their number one priority is minimizing risk. Revenue stability is the most fundamental measure of risk in any acquisition target.

What they want to see is consistent, predictable revenue with a growth trajectory over a minimum of three years. They will normalize for seasonality, which is expected in HVAC. What they do not want to see is a business that did $2.5 million one year, $1.8 million the next, and $3.2 million the year after. That pattern tells them either the market is volatile, the management is inconsistent, or the business is dependent on a few large contracts that come and go.

If your revenue has been volatile, the most valuable thing you can do before going to market is build two to three years of consistent performance. That alone can shift your multiple by half a turn to a full turn.

Revenue Quality: The Factor That Moves Multiples the Most

This is the single biggest differentiator in HVAC valuations right now. According to industry M&A advisors, the sweet spot PE firms target is approximately 45% replacement and installation revenue with 55% coming from maintenance agreements, service calls, and repair work.

The reason is straightforward. Installation revenue is project-based, competitive, seasonal, and exposed to economic cycles and commodity price volatility, including tariffs. Service and maintenance revenue is recurring, predictable, higher-margin, and tied to an installed base that needs attention regardless of what the economy does.

A company with 2,000 maintenance agreements generating $400,000 in annual recurring revenue might see that revenue valued at 2x to 3x on its own, in addition to the EBITDA multiple applied to the rest of the business. The maintenance base is not just revenue. It is a customer asset with quantifiable retention rates, predictable cash flow, and built-in replacement cycle opportunities. Buyers will pay a distinct premium for it.

Customers on maintenance plans are 70% to 80% more likely to purchase their replacement system from the same company. That embedded future revenue is extraordinarily valuable to a buyer thinking about the next five to seven years of cash flow from your business.

Owner Dependency: The Silent Deal Killer

More deals fall apart or get discounted because of owner dependency than any other single factor. A PE firm is not buying you. They are buying a business. If that business cannot function without you, what they are actually buying is a very expensive job.

The evaluation is not subtle. Buyers will ask who closes sales, who manages the service dispatch, who handles the key customer relationships, who makes hiring decisions, and who negotiates with suppliers. If the answer to three or more of those questions is the owner, your multiple takes a significant hit.

The discount is logical from the buyer's perspective. If you leave and the business loses 20% of its revenue because customers were loyal to you personally, the buyer just overpaid by 20%. They price that risk into the offer. According to industry data, businesses where the owner is the primary salesperson or technician can face valuation discounts of 1x to 2x on their EBITDA multiple. On a $500,000 EBITDA business, that is $500,000 to $1 million left on the table.

Reducing owner dependency takes time. Most owners need 12 to 18 months to hire and develop the management layer that makes the business transferable. If you are thinking about selling in the next two to five years, this should be the first thing you work on.

Technician Retention: The Human Capital Factor

The HVAC industry faces an estimated 110,000 unfilled technician positions, according to industry data. The Bureau of Labor Statistics projects 8% employment growth for HVAC mechanics and installers from 2024 to 2034, faster than the average across all occupations. In this labor market, a stable, experienced technician team is not just an operational asset. It is a strategic one.

Buyers evaluate technician tenure, certification levels, turnover rates, and training programs. High turnover is a red flag because it signals operational problems, increases integration risk, and creates the possibility that key talent walks out the door post-acquisition.

The businesses commanding the best multiples have average technician tenure of five or more years, annual turnover below 10%, documented training programs, and a pipeline for developing junior technicians. They treat their technicians as assets that appreciate over time, not as replaceable labor.

Financial Documentation: The Credibility Test

This is the factor that most owners underestimate and the one that causes the most friction during due diligence. Buyers go back three to five years to evaluate your financial performance. They want to see clean, consistent records with clear separation between business and personal expenses.

The most common issue that business brokers encounter is owners who have spent years minimizing reported income for tax purposes and then expect buyers to value the business based on what the business really makes. Buyers do not pay for what your business really makes. They pay for what your financials can prove it makes. Every dollar of unreported income or commingled personal expense reduces your provable earnings and, by extension, your valuation.

Banks and PE firms also evaluate your accounts receivable aging, your debt structure, your equipment depreciation schedule, and the consistency of your accounting methodology. If you switch between cash and accrual accounting, if your revenue recognition is inconsistent, or if your balance sheet has unexplained anomalies, the buyer's confidence declines and so does their offer.

The Deal Structure: What to Expect

Understanding the typical deal structure helps you evaluate offers objectively. Most PE acquisitions of HVAC companies in the $1 million to $10 million revenue range follow a similar pattern.

Sources: Capstone Partners, PKF O'Connor Davies, ACHR News reporting on HVAC PE transaction structures, 2024-2025.

A $5 million offer is not always $5 million in your bank account on closing day. Understanding the structure, particularly the earnout provisions and rollover equity terms, is critical to evaluating whether an offer actually achieves your financial goals.

What to Do Before the Call Comes

The owners who get the best outcomes from PE conversations are the ones who started preparing before the first call. They know their numbers. They have reduced their involvement in daily operations. They have built a maintenance base that demonstrates recurring revenue. Their financials are clean. Their technician team is stable and documented.

You do not need to be ready to sell tomorrow. But you need to be building toward readiness, because the factors that determine your multiple take months or years to improve. The owners who start preparing 24 months before they want to sell consistently outperform the ones who react to an inbound call and try to get ready in 90 days.

The Conversation You Need to Have Before the Call

Before you take the next call from a PE firm, there is a conversation you need to have with yourself. It is not about whether your business is ready. It is about whether you are ready.

Start by defining your walk-away number. What is the minimum amount of money that would make selling worthwhile to you? This is not a negotiating position. It is a personal financial planning exercise. Factor in your post-sale living expenses, your retirement timeline, your tax obligations on the sale, and any financial commitments you want to fund, such as children's education, real estate, or investments. If your walk-away number is $2 million after taxes and your business is currently worth $1.5 million pre-tax, you have two choices: improve the business to close the gap or adjust your expectations.

Next, decide what your post-sale life looks like. Do you want to retire completely? Do you want to stay involved for a transition period? Would you consider running the business as a general manager within a PE platform? Your answer to this question directly affects which buyers to target and what deal structures to consider. A PE firm that wants you to stay for three years is a different conversation than one that will install their own management team.

Finally, assemble your advisory team before you need them. You need an M&A attorney who understands middle-market transactions, not your family lawyer, a CPA who can prepare your financials for buyer scrutiny, not just tax optimization, and ideally a business broker or M&A advisor with specific HVAC transaction experience. Industry data suggests that owners who negotiate without experienced counsel typically accept offers that are 15% to 30% lower than what they could have achieved with proper representation. On a $2 million deal, that is $300,000 to $600,000 in lost value.

The PE call is coming. The question is whether you will be ready to make it a conversation between equals rather than a reaction to an unsolicited offer.

The Due Diligence Timeline

Once a PE firm decides to make an offer, the due diligence process typically lasts two to three months. During this period, the buyer's team will request and review your financial statements, tax returns, customer contracts, employee records, equipment lists, licensing documentation, insurance policies, and operational procedures. They will interview key employees, visit your facilities, and ride along on service calls.

The owners who navigate due diligence most smoothly are the ones who prepared a data room before the process began. A data room is a secure, organized collection of every document a buyer might request. Having it ready signals professionalism and reduces the timeline. Scrambling to assemble documents during due diligence signals disorganization and gives buyers leverage to renegotiate.

Frequently Asked Questions

How do PE firms find HVAC companies to acquire?

PE firms use a combination of cold outreach (direct calls and emails to owners), M&A advisor networks, industry conferences, trade publication advertising, and referrals from portfolio companies. If you own an HVAC company with $1 million or more in revenue, there is a high probability that your business is already in multiple PE firm databases.

What size HVAC company do PE firms want to buy?

Platform acquisitions typically target companies with $5 million or more in EBITDA, while add-on acquisitions target companies in the $500K to $2 million EBITDA range. Add-ons are far more common and represent the majority of current deal activity. Some PE firms are now acquiring companies with as little as $250K in EBITDA if they are in a strategic geography.

Do I have to stay after selling to PE?

It depends on the buyer and the deal structure. New PE platforms entering the HVAC space typically want the owner to stay for two to three years to lead daily operations. Established platforms with existing management infrastructure may allow a shorter transition or immediate retirement, though this usually results in a lower multiple.

What multiple should I expect for my HVAC business?

SDE multiples for smaller HVAC businesses under $500K EBITDA average approximately 2.75x. EBITDA multiples for businesses in the $500K to $5 million range typically fall between 4x and 8x. Larger commercial HVAC companies with $50M+ revenue have traded between 7x and 11x EBITDA. Your specific multiple depends on the six evaluation factors outlined in this article.