Due Diligence Checklist for Buying HVAC Company

Industry Economics to Reconcile

HVAC acquisitions combine recurring service revenue with licensing, qualifying-person dependence, fleet, refrigerant handling, dispatch data, warranty obligations, seasonality, and technician retention.

Build monthly and trailing views. Preserve the source, period, entity, and reconciliation for each material conclusion.

• Reconcile invoices, dispatch software, merchant deposits, maintenance agreements, warranty reimbursements, and tax returns
• Separate installation, replacement, repair, maintenance-plan, new-construction, and commercial margin
• Normalize owner sales and technical labor, technician payroll, callbacks, warranty, vehicle, insurance, and marketing

Operations and Assets

Observe the operating process and compare it with the financial story. Identify the people, equipment, systems, locations, and outside relationships that can stop revenue after closing.

• Technician roster, licenses, certifications, tenure, compensation, productivity, callbacks, and retention
• Fleet titles, liens, mileage, maintenance, telematics, insurance, and replacement
• Dispatch, price book, inventory, refrigerants, permits, warranties, supplier programs, and equipment brands

Official Records and Compliance Routes

Start with exact legal names, addresses, license or facility identifiers, and transaction structure. Search the responsible official authorities and record coverage limits; a no-result search is not a guarantee.

• Contractor and trade licensing boards
• EPA refrigerant technician requirements and environmental records where relevant
• OSHA, DOL, Secretary of State, UCC, courts, and local permit authorities

What Must Transfer

Obtain written confirmation where consent, assignment, change of control, new application, or account migration may apply. Build approval lead time into the closing plan.

• Contractor license and qualifying individual
• Maintenance agreements and commercial contracts
• Phone numbers, domains, dispatch, CRM, vendor, and manufacturer accounts

Industry-Specific Red Flags

Treat each warning as a verification trigger rather than an automatic accusation. Quantify revenue, margin, downtime, replacement, remediation, penalty, or continuity exposure only when support exists.

• Seller is the only qualifier or salesperson
• Maintenance agreements are counted as recurring without renewal and deferred-service analysis
• Fleet or inventory is encumbered or poorly documented
• Callbacks and warranty labor are omitted from normalized earnings

Buyer Closing Controls

• Reconcile current financial performance immediately before closing
• Confirm licenses, consents, insurance, lease, key staff, and operational accounts
• Obtain payoff and release evidence for relevant liens
• Complete inventory, asset-condition, and working-capital procedures
• Version the report and list every change since the LOI
• Escalate legal, accounting, tax, environmental, insurance, or technical issues to qualified advisers