Cold woman warming up her hands.

All City Heat and Air is the leading HVAC company in Charlotte, NC, for your furnace service needs. We service and repair all makes and models. If you need furnace service, we are the company to call. Our skilled technicians are qualified to solve just about any repair or installation that you throw at us.

Furnace Repair

Don’t get left in the cold! Is your furnace acting up, blowing cold air, or making too much noise? Our experienced team of professionals is here to keep your home warm and cozy. We repair all makes and models, and we will never try to sell you a service that you don’t need. Our technicians are honest and hard working, and we’re always transparent and fair about the work we do.

Furnace Replacement

Sometimes a repair is not sufficient to fix your furnace. Sometimes a new furnace is the most cost-effective and energy-efficient way to go. We will always be honest with you about a possible furnace replacement. We value our time and your money––we don’t want to perform repairs or service on an appliance that is in need of replacement.

If you do need a furnace replacement, we know how overwhelming it can be. Here are some of the frequently asked questions about furnaces that we get from some of our Charlotte, NC, residents:

What Are The Different Types Of Furnaces?

Single Stage: A single-stage furnace has only one stage of operation. It can either be turned on or turned off.

Two Stage: A two-stage furnace has two settings––full and half speed. This is a more efficient way to heat and provides for better comfort, because it can move the air at a slower pace.

Variable Stage or Modulating: A variable-stage or modulating furnace modulates the speed and heat output based on the temperature outside and the desired comfort level. This furnace only works as much as you need it, making this type the most energy-efficient type of furnace.

What Is AFUE?

AFUE, or Annualized Fuel Utilization Efficiency, is a measure of furnace-heating efficiency. The higher the AFUE, the more efficient the furnace.

What Size Furnace Do I Need?

We can calculate the correct size furnace for your home. The number of BTUs, or British Thermal Units, needed to heat your home is dependent on a number of variables. Contrary to what you might think, a bigger furnace may not necessarily mean more heating power for your home. Call us at All City Heat and Air, and we can set up an appointment to calculate the furnace size you might need.

How Much Money Can a New Furnace Save You?

Our AFUE energy savings calculator can help determine how much you could save on your utility bills. Simply enter your current unit's AFUE value and compare it to a newer, more efficient system. You can even customize it to better match your home's system for a more accurate calculation.

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Need Furnace Service?

Contact the experts at All City Heat and Air.

Call us at 704-545-2000!

Gas Furnace Maintenance in Charlotte, NC 28213

“I called and was surprised that someone could make service call within hours. Tim was great after checking out my heating system he gave me several service options. I have used them in the past for my heating and cooling needs and will use them again in the future. They have excellent service!” – Laci G.

Gas Furnace Repair in Charlotte, NC 28212

“Tim was on time, and was very professional during his visit. He followed the pandemic protocols of masking and hand sanitizing. He patiently answered my questions and seemed very competent and trustworthy.

Thank you!”

– Chris F.

Gas Furnace Installation in Charlotte, NC 28205

“I’ve been working with All City for over 10 years. When it was time to replace my aging gas furnace and AC, I got other quotes, but as expected, All City came in with the best deal. AND I know how trustworthy they are. Installation went really well on a cold January day. Sandro and his sons were efficient, thoughtful, courteous and professional. We all were masked up and stayed safe too! I have confidence in the installation and I’m enjoying a nice, warm house. Many thanks to Sandro and Sandro, Jr.! And to Jeff for explaining how to work the new (very cool) thermostat! I recommend them 100%.”

– Joyce W.

Gas Furnace Maintenance in Charlotte, NC 28278

“tim did a very good job on todays maintenance visit and pointed out that i needed a new air filter and the correct way to put it in there . . . hey i learned something new today 😁😁😁😁😁 !!!!”

– shawn s.

Gas Furnace Maintenance in Charlotte, NC 28204

“Very professional.”

– Spencer S.

Gas Furnace Maintenance in Charlotte, NC 28278

“Timely, very friendly, and professional service as always!”

– Michael R.

Gas Furnace Repair in Charlotte, NC 28216

“Courteous service at a fair price. This is the second time I’ve used this company and each time I’ve been pleased with their prompt response and efficient manner in which my service is performed. What is going on is explained in simple terms and I never am made to feel like I’m being sold on services I don’t need Thanks a million!”

– Felita L.

Gas Furnace Maintenance in Charlotte, NC 28216

“I want to express my true appreciation for the excellent work Omar and Ernie did yesterday in conducting the annual inspection of our heating system. They were on time, very polite, and did a thorough inspection of both my upper and lower gas heating units. They were here over two hours quietly and competently performing their jobs. At the end of the inspection they gave me an overview of what they checked, and later I received a detailed e-mail report from All City Heat and Air.

Omar and Ernie exemplify the very best examples of Customer Service that All City Heat and Air employees provide to their customer base.

Thank you Omar and Ernie,


– Keith S.

Gas Furnace Maintenance in Charlotte, NC 28277

“All city seems to find the most pleasant people to work with. Tim was great today, as was Ernie in the past. All city is an easy company to work with. They always take the time to answer your questions and don’t make you feel rushed.”

– Dana W.

Gas Furnace Maintenance in Charlotte, NC 28269

“Tim was on time, polite and explained everything clearly. Pleasure to work with.”

– Judy S.

All City Heat and Air proudly provides HVAC service to Belmont, Charlotte, Huntersville, Matthews, Mint Hill, Pineville, Harrisburg, Indian Trail, Waxhaw, and the surrounding communities. Visit our service area page for more coverage details, call us at 704-545-2000, or request service online today.