How to start an HVAC business built on service agreements

HVAC is a durable service trade to own. Most buildings need heating, cooling or both, equipment wears out and needs replacing, and a customer whose furnace you fixed at midnight has a reason to call you again. It is also technical, regulated at the federal and state level, and brutal on cash flow when the weather is mild. This guide covers the work, certification and licensing, insurance, tools and vehicles, pricing, first customers, and how seasons shape the year.

None of this is legal, tax or insurance advice. HVAC licensing differs between states and cities and changes over time; your licensing board and building department have the final word.

What does an HVAC company do day to day?

A residential HVAC shop usually runs three lines of work at once:

• Service and repair. No heat, no cooling, strange noises, water leaking from an air handler. Calls come in waves with the weather, and speed decides who gets them.
• Maintenance. Spring cooling tune-ups and fall heating checks, often sold as an annual agreement with priority scheduling and a repair discount.
• Replacement and installation. Furnaces, air conditioners, heat pumps, ductless systems, ductwork, thermostats and indoor air quality add-ons. The large tickets, often sold after a repair on an aging system.

Light commercial work (rooftop units, small offices, restaurants) adds service contracts and different equipment. New construction is another model entirely, with bids, builders and progress billing. Most new owners start in residential service and replacement, where one or two trained techs can run a profitable route.

What certifications and licenses does an HVAC business need?

EPA Section 608 certification is the federal piece, and it applies everywhere. The EPA says technicians who maintain, service, repair or dispose of equipment that could release refrigerants into the atmosphere must be certified. You earn it by passing an EPA-approved test given by an EPA-approved certifying organization, and the credentials do not expire. The Bureau of Labor Statistics puts it plainly: EPA requires nearly all HVAC technicians to be certified in refrigerant handling. There are four types:

Certification also controls your supply. Under EPA's refrigerant sales restriction, refrigerant may be sold to certified technicians, or to an employer who gives the wholesaler written evidence that it employs at least one properly certified technician. Every tech who handles refrigerant should carry the card.

The refrigerants themselves are changing. EPA's Technology Transitions program sets limits on the use of HFCs in sectors including air conditioning and heat pumps. Read EPA's current rules and your distributors' guidance before you stock equipment, and get trained on the refrigerants the new equipment uses.

State and local licensing is separate and varies a great deal; BLS notes only that some states and localities require HVAC technicians to be licensed. Depending on the state, you may see an HVAC or mechanical contractor license, separate licenses for individuals and for the business, a gas fitting license for connecting gas appliances, and local registration on top. Some states license by experience level, some require a qualifying individual for the company, and many building departments require permits for equipment replacements. Our state pages point you to the right offices; then read your state licensing board's rules directly and call your local building department about permits.

What insurance does an HVAC company need?

• General liability for damage you cause: a condensate leak through a ceiling, a scratched floor during a furnace swap, a gas or carbon monoxide incident tied to your work. Ask your agent how the policy treats completed operations, since problems often appear weeks after you leave.
• Workers' compensation once you have employees. The SBA's insurance guide counts it among the coverage an employer must carry, though the Department of Labor directs workers hurt on the job at private firms to the workers' compensation board in their own state, and states differ. Texas, per its Department of Insurance, does not require it of most private employers. Confirm your state's rule before you hire.
• Commercial auto for service vans, and tool and equipment coverage for the gear inside them.
• Bonds where your state or city requires a license or permit bond, and performance bonds on some commercial jobs.

Our contractor insurance guide explains certificates, endorsements and the paperwork property managers will ask for.

What tools and vehicles do you need to start?

The van is your shop. Set it up so a tech can finish most repairs without a supply house run.

• Refrigerant gauges or a digital manifold, a refrigerant scale, a recovery machine and recovery cylinders.
• A vacuum pump and a micron gauge for proper evacuation.
• Nitrogen with a regulator, a brazing torch, and flaring and swaging tools.
• A combustion analyzer for gas appliances, plus a carbon monoxide meter.
• Multimeter with clamp, capacitor tester, leak detector, and temperature and airflow tools.
• Common parts stock: capacitors, contactors, igniters, flame sensors, motors, filters, thermostats.
• A cargo van with shelving, ladder racks, and secured storage for refrigerant cylinders.

Get current prices from your distributor rather than from online lists, and open distributor accounts early. Good counter relationships get you parts on a Saturday in July.

How do HVAC companies price their work?

Most residential shops use one of two models for service, and quote replacements as packages.

• Flat-rate pricing from a price book: a diagnostic or service call fee, then a set price for each repair task regardless of how long it takes. Customers approve a known number before work starts, and efficient techs earn more.
• Time and materials: hourly labor plus parts at a markup. Simpler to start, harder for customers to accept on a big repair.
• Replacement options: two or three system choices at different efficiency and comfort levels, each with installation, permit, removal and warranty spelled out.
• Maintenance agreements: an annual or monthly fee for scheduled tune-ups, priority service and a repair discount.

Build every price from your real cost per billable hour, including drive time, callbacks, warranty labor and the hours techs spend not billing. Our job pricing guide shows the method. Bill agreements on a schedule with stored payment details; our recurring billing guide covers the setup.

How do you get your first HVAC customers?

HVAC customers remember who showed up when it was 95 degrees inside. Your first goal is to be the company that answers, and your second is to keep every customer you win.

• Answer every call, all hours, in season. A missed call during a heat wave can go straight to the next listing. An AI receptionist can ask your triage questions (any heat at all, who is in the home), book the visit, and page your on-call tech by your rules.
• A website with a page per service (AC repair, furnace repair, heat pumps, maintenance plans) and per town, with your license number shown where your state expects it on advertising.
• A Google Business Profile with service hours that match reality, and photos of clean installs.
• Agents and inspectors in the middle of a home sale, who need furnace and AC checks on short notice.
• Property managers with rentals that need fast repairs and annual filter changes.
• Tune-up mailers and emails to past customers before each season.

Paid leads exist in HVAC too. Google bills Local Services Ads by the lead, and Thumbtack lets a customer contact up to five pros in the first four hours of a search. Use them if you need volume, but track cost per booked job, not cost per lead.

The real asset is your customer list. A custom CRM that keeps the equipment model, install year, filter size and repair history on each address tells you which systems are near replacement and when each agreement visit is due. Our HVAC industry page walks through that setup, and our HVAC marketing ideas list covers owned channels in more depth.

How does the HVAC season run across the country?

• Northern states: two peaks, cooling in summer and heating in winter, with quiet spring and fall shoulders. Those shoulders are when tune-ups, agreement visits and replacement estimates should fill the board.
• Sun Belt: cooling dominates most of the year, with short heating seasons and heat-pump work in mixed climates.
• Humid coasts: dehumidification, drain line and indoor air quality calls run alongside cooling demand.

Cash flow follows the weather. Sell agreements during the peaks, schedule their visits in the troughs, and keep a reserve for the mild month when the phone stays quiet.

If you are weighing related trades, see our guides on starting a plumbing business and opening an electrical shop. Every guide in the series is listed on the start a company hub. Once you have your certification and license sorted, request a free launch plan and we will look at the phone, website and CRM setup you intend to open with.

Frequently asked questions