Questions to Ask Before Hiring an HVAC Contractor

Quick Answer

Before hiring an HVAC contractor, ask whether they hold a North Carolina heating license, what insurance they carry, how they’ll size your system, what the quote includes, whether they’ll pull the permit, what the equipment and labor warranties cover, and who will actually do the work. A good contractor will answer each of these clearly and put the important details in writing.

Choosing an Eden HVAC contractor for a repair or a new system goes better when you have a few useful questions in mind before the first conversation. The questions to ask before hiring an HVAC contractor aren’t complicated, but the answers tell you a lot about how a company works, what you’re paying for, and what happens if something goes wrong later.

Below are the questions worth asking, why each one matters, and what a solid answer sounds like.

HVAC Contractor Checklist: Essential Questions and Good Answers

Use this checklist to compare contractors side by side; a solid answer to each question is specific and can be confirmed in writing.

Essential Question	What a Good Answer Sounds Like
Are you licensed in North Carolina?	Yes, with a license number you can look up on the state board’s website, in the right class for the job (H-3 for most forced-air systems).
What insurance do you carry?	General liability and, for companies with three or more employees, workers’ compensation, with a certificate of insurance provided on request.
How will you size my system?	With a load calculation (ACCA Manual J) based on your home, not by matching the size of the old unit.
What does the quote include?	A written, itemized quote listing equipment brand and model, labor, permit fees, removal of old equipment, and any ductwork, electrical, or venting work.
Will you pull the permit?	Yes. The contractor pulls the permit and schedules the inspection.
What warranties apply?	A clear explanation of the manufacturer’s parts warranty, whether registration is needed, and what labor coverage the contractor provides.
Who will do the installation?	The company’s own technicians, or a clearly identified subcontractor, with EPA 608 certification for anyone handling refrigerants.
What happens if something goes wrong later?	Clear information about emergency service, response, and maintenance options after the job.

 

Are You Licensed to Do HVAC Work in North Carolina?

Any contractor doing heating and air conditioning work in North Carolina must hold a license from the State Board of Examiners of Plumbing, Heating, and Fire Sprinkler Contractors, no matter how small the job.

You should not accept any excuses on this point. For most home heating and cooling systems, the relevant license is Heating Group 3 (H-3), which covers forced-air systems. Boilers and other water-based heating systems fall under Heating Group 1 (H-1). Ask for the license number, then look it up yourself on the state board’s license search. It takes about a minute and confirms the license is active and matches the type of work you need.

What Insurance Do You Carry?

A qualified HVAC contractor should carry general liability insurance and, if they have three or more employees, workers’ compensation insurance.

General liability covers damage to your home caused by the contractor’s work. Workers’ compensation covers a technician who gets hurt on your property, and North Carolina requires it for businesses that regularly employ three or more people. Without it, an injury on your job site can become a much more complicated problem.

How Long Have You Been in Business, and Do You Work on Systems Like Mine?

Time in business is a useful signal of a contractor’s track record, but experience with your specific type of equipment matters just as much.

People talk, so it’s hard to stay in business for long in a community like Eden without doing quality work for fair prices. That makes a contractor’s history worth asking about. Just as important is whether they regularly handle the kind of project you need. Ask how they would approach your specific system, since an oil or propane furnace calls for combustion testing and fuel-line work, while a heat pump or ductless system depends on precise refrigerant charging and sizing.

This matters in Eden, where older neighborhoods such as the Central Leaksville Historic District include homes from the town’s mill era, built long before central air conditioning was common in houses. Heating and cooling in those houses was added later, fitted into whatever crawl space, attic, or closet the house allowed. A contractor familiar with older homes will know to look at the ductwork, insulation, and electrical capacity before recommending equipment.

Will You Do a Load Calculation Before Recommending a System Size?

A good contractor will size your system with a load calculation, not by matching the size of the unit you already have.

A load calculation (the industry standard is ACCA Manual J) looks at your home’s square footage, insulation, windows, air leakage, and orientation to determine how much heating and cooling it actually needs. Simply copying the old unit’s size can repeat an original sizing mistake, or ignore improvements like new windows or added insulation.

Sizing matters for comfort as well as efficiency. An oversized air conditioner cools the house quickly and shuts off before it has run long enough to pull much moisture from the air. During humid Piedmont summers, that can leave a home feeling cool but clammy. If you’re planning a furnace replacement or a new air conditioner, ask how the contractor arrived at the size they’re recommending.

What Does Your Quote Include?

A complete HVAC quote should list the equipment, labor, permit fees, removal and disposal of the old equipment, and any ductwork, electrical, or venting changes the job requires.

Don’t make assumptions about HVAC quotes. You don’t want to presume that something is included only to find out later that the contractor wasn’t planning on it. Ask specifically whether the quote covers all materials and labor, permit fees, disposal of the old equipment, and any modifications to the ductwork. Ask for the brand and model numbers, too, so you can compare quotes on equal terms.

Don’t worry about being seen as a high-maintenance customer. A good contractor will be glad to walk you through the quote and explain exactly what you’re getting for your money. If two quotes are far apart, the line items usually explain why.

Will You Pull the Permit?

Yes, and the contractor should be the one to pull it: North Carolina law requires a permit to replace heating or air conditioning equipment, even on smaller residential jobs.

Under state law, many residential projects under $40,000 don’t need a building permit, but the replacement of heating and air conditioning equipment is specifically excluded from that exception. The permit brings a local inspection, which gives you an independent check that the installation meets code. If a contractor suggests skipping the permit to save time or money, treat it as a reason to keep looking.

What Warranties Come With the Equipment and the Labor?

Most new HVAC equipment comes with a manufacturer’s parts warranty, while the labor to make repairs is covered separately, if at all, by the contractor.

Ask the contractor to explain both. Manufacturer warranties generally cover defective parts, not the cost of the technician’s time to replace them. Some manufacturers also require you to register the equipment to get their longest coverage. Trane, for example, requires registration within 60 days of installation for its extended registered warranty, and its warranties cover parts but not labor. Ask whether the contractor handles registration for you and what labor coverage they provide on their own work.

Will Your Own Technicians Do the Work?

Ask whether the company’s own employees will do the installation or whether it will be subcontracted to another crew.

Subcontracting isn’t automatically a problem, but you should know who will be in your home and who is responsible for the quality of the work. Ask, too, whether the technicians handling refrigerant hold EPA Section 608 certification, which federal rules require for anyone who services or disposes of equipment containing refrigerant.

What Happens If Something Goes Wrong After Installation?

Before you sign, find out how the contractor handles problems after the job is finished, including after-hours breakdowns and routine maintenance.

Ask whether they offer emergency service, how quickly they typically respond, and whether they offer a maintenance plan. A system that’s checked and cleaned regularly tends to run more efficiently and last longer, and a contractor who services what they install has a direct interest in getting the installation right the first time.

What Are the Red Flags When Hiring an HVAC Contractor?

The biggest red flags are a license you can’t verify, a quote that isn’t in writing, and a system size recommended without looking at your home.

• No license number, or a license that doesn’t show up on the state board’s search
• A price given over the phone for a new system, without a visit to the house
• A reluctance to put the quote, equipment, and warranty details in writing
• A suggestion to skip the permit
• Pressure to sign the same day
• A large cash deposit requested up front with no written contract

“The best questions are the ones that make a contractor show their work. Ask how they sized the system, what’s in the quote, and who’s pulling the permit. If the answers are specific and written down, you’re in good shape. If they’re vague, that tells you something too.”

Darrel Honeycutt, Expert HVAC Technician, Berico

Get Straight Answers From Berico of Eden

The right HVAC contractor will be licensed and insured, size your system with a load calculation, spell out everything in the quote, pull the permit, and explain the warranty in plain terms. Asking these questions up front helps you compare contractors fairly and avoid surprises after the work is done.

Berico of Eden, formerly Carolina Fuels, welcomes every question on this list. Our team can walk you through a quote line by line, explain how we sized your system, and show you what the warranty covers. For a new system or routine HVAC service, call our Eden office at (336) 623-9741 to schedule a visit.

People Also Ask

How do I check if an HVAC contractor is licensed in North Carolina?

You can check an HVAC contractor’s license on the State Board of Examiners of Plumbing, Heating, and Fire Sprinkler Contractors website. Ask the contractor for their license number or company name, then search the board’s online license lookup. The results show whether the license is active and what type of work it covers. For most home heating and cooling systems, look for a Heating Group 3 (H-3) license. Boilers and other water-based systems require a Heating Group 1 (H-1) license.

What insurance should an HVAC contractor have?

An HVAC contractor should have general liability insurance to cover damage to your property and workers’ compensation insurance to cover injuries to their employees. North Carolina requires workers’ compensation for businesses that regularly employ three or more people. Ask for a certificate of insurance before work begins so you can confirm the coverage is current. A verbal assurance isn’t enough, since coverage can lapse without you knowing.

Do you need a permit to replace an HVAC system in North Carolina?

Yes. North Carolina law requires a permit to replace heating or air conditioning equipment. While many residential projects under $40,000 are exempt from building permits, HVAC equipment replacement is specifically excluded from that exemption. Your contractor should pull the permit and schedule the inspection. The inspection provides an independent check that the installation meets code, and unpermitted work can complicate things when you sell your home.

What is a load calculation, and why does it matter?

A load calculation determines how much heating and cooling your home needs based on its size, insulation, windows, air leakage, and orientation. The industry standard method is ACCA Manual J. It matters because an undersized system struggles to keep up, while an oversized air conditioner cycles on and off too quickly to remove humidity well. A contractor who skips the calculation and matches your old unit’s size may repeat an original sizing mistake.

Does an HVAC warranty cover labor?

Manufacturer warranties on HVAC equipment typically cover defective parts, not the labor to replace them. Labor coverage, if offered, comes from the contractor. That’s why it’s worth asking any contractor what labor warranty they provide on their installation. Some manufacturers also require product registration within a set time after installation to receive their longest parts coverage, so ask whether your contractor will register the equipment for you.

How many HVAC quotes should I get?

There’s no required number, but getting more than one quote lets you compare equipment, pricing, and scope of work. The key is comparing quotes on equal terms: the same equipment efficiency, the same scope of ductwork or electrical changes, and the same warranty coverage. If two quotes are far apart in price, look at the line items. The difference usually comes from what’s included, not just the equipment.

What is EPA 608 certification?

EPA Section 608 certification is a federal requirement for technicians who maintain, service, repair, or dispose of equipment that could release refrigerants into the atmosphere. It shows the technician has been trained to handle refrigerant safely and legally. Any technician working on the refrigerant side of your air conditioner or heat pump needs this certification, so it’s a reasonable question to ask before work begins.

Is it a red flag if an HVAC contractor gives a price over the phone?

For a repair with a known cause, a phone estimate may be reasonable. For a new system, it’s a warning sign. Accurate pricing for a replacement depends on your home’s heating and cooling needs, the condition of your ductwork, and what electrical or venting changes are required. A contractor who quotes a full system without visiting your home hasn’t done the work needed to size it properly.