Before diligence begins, you'll face a first meeting — the audition where PE decides whether to continue. See our guide to the 27 questions PE asks HVAC owners at the first meeting before working through this diligence list.
Section 1: Financial Questions (1–10)
PE buyers spend roughly 40% of diligence on financials. They're not just verifying numbers — they're looking for quality of earnings and hidden liabilities.
Can you provide 3 years of P&Ls, balance sheets, and tax returns?
What they're really asking: Are your reported earnings consistent with what you filed with the IRS? Discrepancies are red flags.
What are your owner add-backs, and can you document each one?
What they're really asking: How much of your personal spending runs through the business? They need to normalize EBITDA.
What is your working capital cycle? How much cash is tied up in receivables?
What they're really asking: Will they need to inject cash to fund operations at close?
Do you have any off-balance-sheet liabilities (equipment leases, personal guarantees)?
What they're really asking: Are there financial obligations that don't show up in the P&L?
What is your revenue concentration by customer? Does any single customer represent more than 10% of revenue?
What they're really asking: If your top customer leaves, how much of the EBITDA disappears?
How much of your revenue is recurring (maintenance agreements) vs. project-based?
What they're really asking: This directly affects the multiple they'll pay. Recurring revenue is worth 1.5–2x what project revenue is.
Can you provide monthly revenue by service line for the past 3 years?
What they're really asking: They want to see seasonality, growth trajectory, and whether service mix is shifting.
What is your gross margin by service type (residential, commercial, service, install)?
What they're really asking: They're looking for margin dilution and cross-subsidization.
Are there any pending or threatened litigation, tax audits, or regulatory actions?
What they're really asking: Undisclosed liabilities can retrade the deal or kill it at closing.
How are your vehicles and equipment carried on the books? What is their actual market value?
What they're really asking: Is CapEx understated? Will they need to replace equipment immediately post-close?
Section 2: Operational Questions (11–20)
Operations diligence focuses on whether the business can run without you — and whether it can scale.
Who runs day-to-day operations when you're not there?
What they're really asking: This is the owner-dependence test. If the answer is "no one" or "me from my phone," PE will reprice the deal.
Do you have documented processes for dispatch, scheduling, and customer escalation?
What they're really asking: Documented SOPs signal a scalable system. Missing documentation means PE inherits tribal knowledge risk.
What software do you use? (ServiceTitan, Housecall Pro, QuickBooks, etc.)
What they're really asking: Clean data from a field service platform reduces diligence time and increases buyer confidence in your metrics.
What is your technician turnover rate? How do you recruit and retain?
What they're really asking: Tech turnover above 30% annually is a red flag. PE wants to know the labor model is stable post-acquisition.
How are jobs priced? Is pricing standardized across technicians?
What they're really asking: Variable pricing is a margin leakage and customer consistency problem. PE wants to see a pricing book.
What is your average ticket size, and how has it trended?
What they're really asking: Flat or declining average ticket is a warning sign. Growing average ticket signals upsell capability and technician quality.
Do you have a service manager? Who handles quality control?
What they're really asking: A service manager layer is a direct platform indicator. Its absence puts the multiple at the lower end of the range.
What is your fleet size and average vehicle age?
What they're really asking: Old, high-mileage fleets create immediate CapEx requirements. PE models this into the purchase price.
How do you handle emergency calls? What is your after-hours coverage model?
What they're really asking: Emergency call coverage is a revenue and retention driver. PE wants to know it's systematized, not owner-dependent.
Do you have a commercial division? How is it staffed and managed?
What they're really asking: Commercial revenue with service contracts is high-multiple revenue. PE wants to understand its scale and management structure.
Section 3: Customer & Market Questions (21–30)
PE buyers want to understand the durability of your customer base and your competitive position in the market.
How many active customers do you have? How is "active" defined?
What they're really asking: Customer count without a definition is meaningless. PE wants to know your retention baseline and what counts as a customer relationship.
What is your customer retention rate year-over-year?
What they're really asking: Retention rate directly predicts recurring revenue durability. A declining rate is a multiple-compressor.
How many maintenance agreement customers do you have? What is the annual contract value per customer?
What they're really asking: This is the most important number in a PE diligence package. Contract count, retention rate, and average value set the recurring revenue floor.
How do customers find you? What is your lead source breakdown?
What they're really asking: Heavy dependence on a single channel (like referrals) creates concentration risk. PE wants diversified, scalable lead sources.
Do you have a Google Business Profile? What is your average rating and review count?
What they're really asking: Online reputation is a tangible asset. A high rating with 200+ reviews is a competitive moat PE can quantify.
Who are your main competitors in the market? Why do customers choose you over them?
What they're really asking: PE wants to understand your competitive differentiation before they inherit it. Generic answers raise doubts about sustainable advantage.
What geographies do you serve? Are there adjacent markets you haven't entered?
What they're really asking: Adjacent market whitespace is a growth thesis PE can underwrite. It justifies a higher multiple on current EBITDA.
Do you have any commercial contracts or municipal accounts?
What they're really asking: Long-term commercial contracts are high-quality recurring revenue. PE values these more per dollar than residential break-fix.
What is your average customer acquisition cost?
What they're really asking: CAC versus lifetime customer value tells PE how efficiently you grow. High CAC relative to contract value is a profitability signal.
Have you lost any major accounts in the past 2 years? Why?
What they're really asking: Lost accounts aren't disqualifying — but unexplained attrition creates uncertainty. Buyers want honest context.
Section 4: Legal & Compliance Questions (31–40)
Legal diligence is often the last thing operators prepare for — and the most surprising.
Are all your technicians properly licensed for the states and municipalities you operate in?
What they're really asking: Unlicensed work is a liability that survives closing. PE will require reps and warranties on licensing compliance.
Do you have current certificates of insurance? What are your coverage limits?
What they're really asking: Inadequate coverage creates post-close risk exposure. PE will want to see coverage levels before the deal closes.
Do you have any outstanding liens, judgments, or UCC filings?
What they're really asking: These encumber the assets being transferred. Undisclosed liens are one of the most common deal-killers at closing.
Are your employment agreements, non-competes, and offer letters up to date?
What they're really asking: Missing employment documentation creates post-close HR risk. PE wants key employees locked in before transfer.
Do you have any franchise agreements or territory restrictions?
What they're really asking: Franchise agreements often limit transferability. Territory restrictions can block PE's expansion thesis before the deal closes.
Are your EPA Section 608 certifications current for all refrigerant-handling technicians?
What they're really asking: Lapsed certifications are a compliance liability and a regulatory fine risk PE won't absorb without a price adjustment.
Do you have any environmental liabilities (refrigerant disposal, fuel storage)?
What they're really asking: Environmental liabilities are open-ended and can exceed the deal value in worst-case scenarios. PE prices these aggressively.
Are your customer contracts assignable in a sale?
What they're really asking: Non-assignable contracts don't transfer in a sale — meaning recurring revenue evaporates at close. This is a deal-critical question.
Do you have IP (software, branding, proprietary pricing tools) that is formally owned by the entity?
What they're really asking: IP owned by the founder personally — not the business — doesn't convey in an asset sale. This needs to be cleaned up before diligence.
Are there any related-party transactions (business with family members, personal real estate leased to the business)?
What they're really asking: Related-party transactions can inflate or distort EBITDA. PE will normalize them — and price the adjustment.
Section 5: Management & Transition Questions (41–50)
PE buyers are buying a business, not a job. Management continuity and the owner's role post-close are critical to getting a deal done.
Are you willing to stay on for 12–24 months post-close in a transition role?
What they're really asking: Transition continuity is a prerequisite for most PE deals. An unwillingness to stay can kill the transaction or reduce the multiple.
What does your management team look like? Who would be a flight risk post-close?
What they're really asking: PE is acquiring a team, not just revenue. Identifying flight risks lets them structure retention packages before close.
Do you have an operations manager, service manager, or GM who runs the business independently?
What they're really asking: This is the single most important management question. A functioning management layer below the owner is worth 0.5x–1x on the multiple.
What would happen to the business if you left tomorrow?
What they're really asking: If the answer is "it would struggle significantly," PE will discount the multiple accordingly or require a longer earnout.
Have you shared your intention to sell with any employees? With customers?
What they're really asking: Premature disclosure creates retention risk and can trigger customer anxiety. PE wants to know what's already out there.
What are your personal financial goals from this sale?
What they're really asking: Understanding your number helps PE structure the deal to get to yes. It also surfaces misalignment before it kills the transaction.
Are you open to rolling equity into the PE platform company?
What they're really asking: Rollover equity aligns incentives and signals confidence in the business. PE views rollover willingness as a positive signal.
What has your growth strategy been? What would you do with more capital?
What they're really asking: PE is looking for a growth thesis they can execute. An owner with a clear answer is an operator PE wants to keep; a blank stare raises red flags.
Are there specific employees you want protected or retained post-close?
What they're really asking: This surfaces key-person dependencies and tells PE where to focus retention packages during the integration process.
What is your ideal timeline from LOI to close?
What they're really asking: Misaligned timelines are a friction point. PE wants to know whether your personal situation creates urgency that could affect your negotiating leverage.
The #1 Thing PE Buyers Are Looking For
Behind every question in this list is one master question: Can this business grow without the current owner? If the answer is yes — or can be yes with 12 months of transition — you have a fundable business. If the answer is no, you have a job, and PE will price it accordingly.
How to Prepare
The best time to start preparing for these questions is 12–18 months before you plan to go to market. Here's where to focus:
Run a pre-diligence valuation.
Know your EBITDA, your multiple range, and your PE Readiness Score before any buyer does. Use the free calculator →
Get 3 years of clean financials.
If your books aren't clean, hire a CPA to normalize them 6–12 months before you go to market.
Document your operations.
Write down how the business runs. Dispatch SOPs, pricing models, and org charts. Buyers pay more for documented processes.
Download the Full Valuation Report.
Our $49 report walks through every value driver with your specific inputs, so you can see exactly where you're strong and where you're exposed before a buyer finds it. Get the report →
Frequently Asked Questions
How long does PE due diligence take for an HVAC company?
Typically 60–90 days from signed LOI to close, though financial diligence often begins informally during the letter of intent process. Larger transactions with multiple earn-out components can run 120 days.
Can I negotiate on diligence findings?
Yes — but only from a position of strength. Buyers will use diligence findings to retrade (reduce) the purchase price. If you know your exposures in advance, you can either fix them pre-close or pre-price them into your ask so the retrade doesn't catch you off-guard.
What's the difference between diligence for a PE add-on vs. a platform acquisition?
Platform diligence is more extensive. PE buyers acquiring a platform company (the first acquisition in a new market) conduct full legal, financial, operational, and management diligence. Add-on diligence is often streamlined because the platform PE already has infrastructure in place — but financial and legal checks are always thorough.
OffRamp is a free valuation tool for HVAC business owners. We don't sell your information, represent buyers, or work on commission. The calculator and reports are educational tools — always consult a licensed M&A advisor before entering a sale process.