How to Hire an HVAC Contractor: Questions to Ask and Red Flags
An HVAC contractor installs, repairs and maintains the systems that heat and cool your home: furnaces, heat pumps, air conditioners and the ducts that carry the air. To hire a good one, know what kind of repair or project you have, check the license with your state, ask a few sharp questions and compare written quotes line by line.
Contractor Palace matches you with one independent local pro. The pro does the work and you pay the pro directly.
HVAC services: heating, cooling, air conditioning and refrigeration.
Heating
Furnaces, boilers and heat pumps. Tune ups, repair and full installation. Planning a new furnace? Read our furnace installation guide.
Cooling
Central air, mini splits and heat pumps that cool in summer. Handling the refrigerant inside these units takes federal training [U.S. EPA, Clean Air Act Section 608].
Air and ducts
Duct sealing, filters, thermostats and indoor air quality. Leaky ducts waste the comfort you pay for.
Some HVAC contractors in your area specialize in residential work and others in commercial buildings. Look for a dedicated team that is able to work on your kind of system, whether you need air conditioning repair, HVAC repair or a full replacement. A reliable business will explain energy efficient options and the solutions that fit your home, and will be serving your county or metro area.
Repair, replacement or maintenance: which project do you have?
A repair. No heat, warm air from the vents or a strange noise. You want a clear price before work starts.
A replacement. The system is old or keeps breaking. This is the biggest bill, so it deserves the most care. Our HVAC replacement cost guide shows how pricing works.
Maintenance. A yearly check before heating or cooling season, and a calm way to meet a contractor before an emergency. See ENERGY STAR heating and cooling maintenance tips for what a basic tune up covers.
How to check an HVAC business's license.
In many states, HVAC work needs a state or local license, and the rules change from place to place. Search your state's contractor licensing board site, type in the business name and make sure the license is active and covers HVAC.
Ask the pro for their license and proof of insurance before anyone starts work. For AC work, ask whether the technician is allowed to handle refrigerant under EPA Section 608. Read the EPA rules for handling AC refrigerant if you want the details. Also ask whether the contractor pulls the permit when your city requires one.
Questions to ask HVAC candidates that separate real professionals.
Who will be at my house? An employee, a subcontractor or the owner?
How did you size this unit? A real answer mentions your home, not a rule of thumb.
What does the maker's coverage include? Ask what the manufacturer covers and whether the unit must be registered to keep it.
What is the payment schedule? Get it in writing, and avoid paying everything before the work is done.
How to compare quotes from HVAC contractors near you.
Get two or three quotes from local HVAC contractors. The lowest number is not always the best HVAC deal. Better candidates put more detail in writing, so check that each lists:
Reviews: what a star rating does not tell you.
When you search for local HVAC contractors, remember a high rating with a handful of reviews says little. Read the newest reviews first and look for ones from customers with your kind of job, whether that is a house, a condo or a small commercial building. Calm, specific replies to complaints are a good sign.
Big company or two guys and a truck? Either can do quality work. Small shops often put the owner on the job, while a larger team may have more technicians for a busy season.
The benefits of hiring well last for years.
The benefits of a careful hire show up for years. A correctly sized system runs better, a clear written scope avoids surprise charges and a contractor who answers questions before the job is more likely to answer them after it. Good HVAC contractors attract repeat customers by being easy to reach, able to explain air conditioning and heating options in plain words and willing to put each step in writing.
Red flags when hiring HVAC contractors.
HVAC contractor FAQ.
How do I find the best HVAC contractor near me?
Start with two or three local HVAC contractors who work on your kind of system. Check each license on your state board site, read recent reviews, then get written quotes. The best HVAC contractor for you is the one who explains the job clearly and puts everything in writing.
Should an HVAC contractor do a load calculation?
For a new or replacement system, yes. A load calculation uses your home's size, windows and insulation to pick the right size unit. A wrong size unit costs more to run. Ask the contractor how they sized the unit.
Is it worth getting more than one quote?
For a small repair, one honest written quote is often enough. For a new system, get at least two or three. Comparing them is how you spot a bad one.
Can one company handle heating, cooling and plumbing?
Many can. Plenty of HVAC contractors also offer plumbing. Make sure the company holds the right license for each trade.
Get matched with one local HVAC pro.
Tell us about your heating or cooling project. Contractor Palace matches you with one independent local pro who looks at the job and gives you a quote. The pro does the work and you pay the pro directly. You can also read more about our HVAC service first.