THE SHORT ANSWER Get licensed first: EPA Section 608 certification is federal for anyone handling refrigerants, and contractor licensing varies by state — verify with your state board. Then form the entity, price insurance with an agent, run the unit math on your own numbers, and build the call-answering, review-asking machine before the first van rolls.
Most guides on how to start a heating and air conditioning business open with invented numbers — average startup cost, average technician wage, market size to the decimal. We're not doing that. Costs and licensing vary by state, and any generic guide quoting specifics is guessing. What doesn't vary is the structure: what order to do things in, what arithmetic to run, and what machine to build from day one. We started our own company with two people and zero startup capital — the first month brought in $227 — so we have strong opinions about what actually matters in a launch and what's decoration. This guide is the structure.
The licensing reality
Two layers, and people constantly confuse them.
The federal layer is EPA Section 608. If you handle refrigerants — and in HVAC you will — federal law requires Section 608 certification. This is non-negotiable and doesn't care what state you're in. Most working techs already have it.
The state layer is contractor licensing, and it varies — a lot. Some states require a full HVAC contractor license with documented field experience and a trade exam plus a business-law exam. Some delegate to counties or cities. Some regulate the mechanical work under a general contracting framework. We're deliberately not quoting requirements or fees, because any specific figure would be wrong for most readers. The move is simple: go to your state's contractor licensing board — the actual government site, not a lead-gen page wearing its costume — and read the requirements for your classification. Do this before anything else, because in states with experience requirements, the license timeline is your launch timeline.
The path most owners actually take
Almost nobody starts an HVAC company cold. The normal path is apprentice, then tech, then lead tech, then the day you realize you're generating the revenue while someone else keeps the margin. That path is an asset: by the time you're ready to own, the technical skills are handled.
Which means the gap is not the gap you think. The failure mode for a new HVAC company is almost never bad brazing. It's business skills: pricing jobs by feel instead of arithmetic, not answering the phone on a ladder, never asking for the review, and treating follow-up as something you do when it's slow. The trade got you here. The trade will not run the company. Every section below is about the half you haven't been trained on.
The launch sequence
In order, because order is most of the value:
- License first. Covered above. In experience-requirement states, this step sets the calendar for everything else.
- Form the entity. An LLC or similar keeps a compressor claim from reaching your house. Your state's filing site handles this; an accountant is worth a conversation on tax treatment.
- Price insurance with an agent — before you buy anything. The categories to ask about: general liability, commercial auto for the van, workers' comp when you hire, and a bond if your state requires one. Premiums depend on your state, your record, and your work mix, so get real quotes from a licensed agent instead of budgeting from a blog's guess. The quotes become inputs for your unit math.
- The first van. The temptation is the wrapped, racked-out truck. The reality: a reliable used van, your existing tools, and stock for the jobs you actually book beats a showpiece financed against revenue you don't have yet. The van is a cost center until the phone rings. Spend on what makes the phone ring.
- Wire the machine before the first job. Call handling, follow-up, reviews — next section. It costs almost nothing at this stage, and retrofitting it later is how owners end up busy and broke.
Run the unit math on your own numbers
We won't hand you invented averages. We'll hand you the arithmetic, which is worth more:
- Average job value. From your tech years, you know what the common calls in your market bill. Write down your honest average.
- Jobs per week you can actually complete. Solo with one van, there's a physical ceiling. Write that down too.
- Multiply. That's your gross revenue ceiling as currently built.
- Subtract your monthly fixed costs — the insurance quotes, the van payment, fuel, phone, software, license renewals, your own pay. Real quotes, not estimates.
- What's left is margin, and now every business decision becomes arithmetic. What does the number look like if average job value rises because you quote replacements, not just repairs? If a second van doubles capacity? If maintenance agreements smooth the shoulder seasons?
One relationship to burn in: close rate is a multiplier, not a detail. Move your close rate from 20% to 30% and revenue rises 50% on the same lead flow — no extra marketing spend, no second van. The cheapest growth in this business is almost always in the numbers you already have.
The day-one machine
Every HVAC company that stalls has the same three holes. Build the plugs before the first job:
- Every call answered — or texted back in seconds. You'll be in a crawlspace when the phone rings. The caller with a dead system dials the next company in about a minute. A missed-call text-back that fires automatically — "This is [you] at [company], on a job, what's going on with your system?" — keeps the lead alive until you're out of the crawlspace. This is cheap software, not a receptionist.
- Reviews asked at the happy moment. The moment the system kicks on and the house starts cooling is the peak of customer gratitude. That's when the review link goes out — by text, on the spot, every job. Our own insurance agency, FreedInsure, runs on this: 4.9 stars across 519 public Google reviews — that agency's rating, not ConfidentConnect's. Reviews are what make a stranger with a broken furnace pick you off a search page.
- One town owned before three chased. A new company that ranks first in one town beats one that's invisible in five. Local SEO for HVAC is its own discipline — we broke it down in our HVAC SEO guide — but the strategy fits in a sentence: dominate the town you live in, then expand outward one ring at a time.
This machine isn't HVAC-specific — it's the same one every home-services trade needs, and we've written up the full home-services playbook separately. But HVAC punishes the holes faster than most trades, because of what comes next.
Emergency calls are a speed contest
When a homeowner's AC dies in July, they aren't researching. They're calling down a search page and hiring the first competent-sounding company that answers. The job goes to the fastest responder so reliably that response speed functions as a pricing power: the company that answers first rarely gets shopped. This is the speed-to-lead dynamic, and it's worth understanding cold — we wrote the full breakdown here. For a new HVAC company the implication is blunt: your answer rate is a revenue line. Wire it accordingly.
Sell maintenance agreements from day one
Every repair customer is a maintenance-agreement prospect: a seasonal tune-up plan, billed on a schedule, with priority service attached. Owners treat this as an upsell to get to eventually. It's the opposite — it's the foundation, for three reasons. It smooths revenue across the shoulder seasons. It fills your calendar with customers who call you first when the system finally dies, which is where replacement revenue lives. And it's the difference between owning a job and owning an asset: a business built on recurring agreements is one a buyer can value, because the revenue doesn't walk out the door with you.
From our own floor: we built our insurance business on the same mechanism — a renewal book averaging $1.3M a year in revenue, with roughly three-quarters of clients renewing. Different trade, identical lesson: recurring revenue is the part of the business that's actually worth something. Start the agreement book on job one.
Straight answers
Generally, yes. Anyone handling refrigerants needs EPA Section 608 certification — that one is federal and non-negotiable. Contractor licensing is a state matter: requirements, experience thresholds, and exams vary widely, and some states add county or city rules on top. Verify with your state's contractor licensing board before you spend a dollar on anything else.
Nobody can give you one honest number — licensing, insurance, and vehicle costs vary too much by state and situation, and any guide quoting exact figures is guessing. Price your own list instead: licensing and exams, insurance, a van, tools and gauges, initial materials, and a few months of operating cushion. Call your state board and an insurance agent and fill in real numbers.
You can, and plenty of owners do — nights and weekends while a paycheck covers the bills. The constraint is service calls: HVAC customers call when something is broken, and a business that can't answer or respond fast loses the job. If you start part-time, wire the machine first — every call answered or texted back — so the business looks full-time before it is.
One machine, three parts. Answer every call — and when you can't, an automatic text goes back within seconds. Ask every happy customer for a Google review at the moment the fixed system turns on. And own one town's search results before you chase three. Referrals compound on top of that, but only if the first two parts already work.
