HVAC Business Guides

Two businesses under one roof

An HVAC company is two businesses sharing a phone line. Service is diagnosis and repair: no-cool and no-heat calls, tune-ups and same-day fixes. Replacement is equipment sales: a system sized to the house, a written proposal and an equipment bill on your distributor account. Each feeds the other: service visits show you which systems are near the end, and each install can become years of service work.

Certification and licensing

Federal: EPA Section 608. EPA requires technicians who maintain, service, repair or dispose of equipment that could release refrigerant into the atmosphere to be certified, and its four certification types (I, II, III and Universal) are tied to kinds of equipment ¹. Since January 1, 2018, the sales restriction has covered HFCs and other substitute refrigerants, so you buy refrigerant as a certified technician or as a company that shows it employs one ². The EPA Section 608 certification entry explains the exam.

State and local: licenses and permits. Contractor licensing is set state by state, and permits usually come from your city or county. Some states and localities also license individual technicians ³. Ask your state licensing board which license covers residential HVAC work and whether gas piping or electrical work needs its own, then ask your building department which jobs need a permit.

The refrigerant transition

The refrigerant changeover touches your tools, training, stock and prices. The AIM Act, enacted December 27, 2020, directs EPA to phase down HFC production and consumption by 85% from historic baseline levels by 2036 ⁴. New residential and light commercial air conditioners and heat pumps face a refrigerant global warming potential (GWP) limit of 700, with restrictions that began January 1, 2025 ⁵, and EPA lists A2L refrigerants such as R-454B and R-32 as acceptable for that equipment, subject to use conditions ⁶. Older systems still need service: no new R-22 has been produced or imported in the US since January 1, 2020, so R-22 systems run on refrigerant made before then or recovered and reclaimed from other equipment ⁷.

A final rule EPA issued on May 26, 2026 removed the installation deadline for systems whose specified components were all manufactured or imported before January 1, 2025, so remaining equipment built for an older refrigerant such as R-410A can still be installed ⁸.

For an owner, that means A2L-compatible recovery machines, vacuum pumps and leak detectors, more than one refrigerant on the truck, and naming the refrigerant on every quote. How to start an HVAC business puts these steps in order, from certification and licensing to A2L tools and distributor accounts.

Safety on every call

HVAC work mixes pressurized refrigerant, live circuits and, on fuel-burning heat, combustion, so write safety rules into your process instead of leaving them to each tech.

• Refrigerant. EPA prohibits intentionally venting refrigerant, HFCs included, while servicing or disposing of equipment ⁹, so recovery equipment goes on every truck. A2Ls are mildly flammable, so get A2L safety training before the first install.
• Combustion. ENERGY STAR's heating check-up covers gas or oil connections, gas pressure, burner combustion and the heat exchanger, and warns that improperly operating connections are a fire hazard and can contribute to health problems ¹⁰. Decide in advance what a tech does about a cracked heat exchanger or a failed vent.
• The job site. Kill power at the disconnect and confirm it with a meter before touching anything, and schedule summer attic work for mornings.

Seasonality

HVAC demand follows the weather. In a four-season market the year has two peaks, summer cooling and winter heating, with quieter spring and fall shoulders between them. BLS notes that overtime and irregular hours are common for technicians during peak heating and cooling seasons ³. ENERGY STAR tells homeowners to have the cooling system checked in spring and the heating system in fall, because contractors get busy once summer and winter arrive ¹⁰. That's your calendar: fill the shoulders with tune-ups, replacement proposals, training and hiring, and set triage rules, on-call rotations and truck stock before each peak. The HVAC seasonal playbook lays out the year month by month, including fall safety checks and no-heat triage.

How customers buy

Customers arrive in one of two situations:

Maintenance agreement members put you first in line for both: the emergency call and the planned replacement. Planned buyers compare proposals line by line, so build option tiers on real efficiency differences. DOE minimums for central air conditioners and heat pumps have been stated in SEER2, EER2 and HSPF2 since January 1, 2023, and split-system AC minimums are higher in the Southeast and Southwest than in the North ¹¹. Present rebates as conditional, and drop the federal energy efficient home improvement credit (section 25C) from your sales materials: it isn't allowed for property placed in service after December 31, 2025 ¹².

How to get more HVAC customers covers agreements, Google listings, referral partners and quote follow-up, and how to write an HVAC estimate covers proposals that compare cleanly.

The money mechanics

• Service runs on your cost per billable hour, worked out across the slow months too. Diagnostic fees, flat rates and after-hours premiums all start from it. How to set your labor rate has the method.
• Replacements are sized, then priced. Size from a Manual J load calculation, not the old unit's label, then price to a target gross margin.
• Equipment money moves first. Your distributor bill can come due before the customer pays, so settle deposit and financing terms before you order. How much deposit to ask for covers amounts and state limits.
• Refrigerant gets its own line, priced per pound and updated when your supplier's price changes.
• Agreements smooth the year. A service agreement fills mild months with booked visits and brings in revenue whatever the weather.

How to price HVAC jobs works through service and replacement pricing with examples, and how to invoice HVAC jobs covers serial numbers, warranty registration, financing payouts and agreement billing.

Hiring your first tech

Your first hire decides what you can take on next: a service tech frees you to sell replacements, and an install helper lets you take two-person changeouts. Check the 608 card and any required license, test skills on a paid ride-along, and hire in a shoulder season, before the phones get busy. Hiring your first HVAC technician covers pay data, apprenticeships, worker classification and the first 90 days.