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Furnaces

A happy family sitting on the couch.

ESI Heating is the leading HVAC company in Portland, MI, 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.

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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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 Portland, MI 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 ESI Heating, and we can set up an appointment to calculate the furnace size you might need.

Need Furnace Service?

Contact the experts at ESI Heating.

Call us at 517-647-6906!

Gas Furnace Installation in Portland, MI 48875

“Mike is courteous, friendly and knows his job well. He has always taken the time to answer my questions and point things out. Mike is awesome and so is ESI!” – Marcy L.

Gas Furnace Installation in Portland, MI 48875

“Justin and Terry did a great job with the installation of my new furnace. They were very knowledgeable and took the time to explain everything. Kudos to ESI!”

– Marcy L.

Gas Furnace Installation in Sunfield, MI 48890

“They are professional and explained as they went along. They showed me what they had done upstairs and in the basement.”

– Joyce R.

Gas Furnace Installation in Portland, MI 48875

“The guys were prompt to show up, did a great job on the install, cleaned up after themselves, were happy to answer questions and knew what they were doing. We were very pleased!”

– Robert W.

Gas Furnace Replacement in Holt, MI 48842

“I was very happy with Justin and Terry. They were both very polite, knowledgeable, and eager to answer any questions I might have. When they left my home, they had cleaned up and you wouldn’t have known that they were ever here. Being in the construction trades myself, and what I expect from my guys who go into a person’s home representing our company, to find a company like ESI is a real pleasure to deal with. I will be highly recommending ESI Heating and Cooling to all my friends and people I deal with. Thank you ESI Heating and Cooling. ”

– Bill H.

Gas Furnace Installation in Grand Ledge, MI 48837

“Very professional and thorough. Worked to get our failed furnace replaced as quickly as possible.”

– Geoffrey B.

Gas Furnace Installation in Haslett, MI 48840

“As part of the excellent installation process for our new Tempstar furnace, Steve came back to our home a week later to conduct a thorough “tuning” and check of the furnace. He also reinforced the training we had received from Justin and Terry on basic maintenance and operation of the thermostat. Steve was prompt, friendly, and went straight to work. It was obvious that his goal was to make sure all was well with the new furnace and to make sure that we were comfortable with operating the thermostat. ESI has a wonderful team. We are completely satisfied and grateful!!”

– Ciney and Jan R.

Gas Furnace Installation in Haslett, MI 48840

“Mike showed us during fall maintenance that a problem was developing with our 17 year old furnace. Nick provided a couple of quotes from the Tempstar furnace line, assuring us that we would notice improved performance and better thermostat control. He was so very right! Our home temperatures are much more even between rooms and between floors. Even the humidity feels more comfortable. Our old thermostats were so difficult to operate and modify. This new one is intuitive and a breeze to use.
Justin and Terry arrived as planned, were friendly, considerate and helpful. They had the new furnace operating the first day with no noticeable discomfort during the install despite the winter weather. The next day they returned to finish the job and train us on the thermostat controls and basics like changing the filter.
We couldn’t ask for a smoother transition and are very pleased with our new furnace. Every chance we get we recommend the team at ESI — maybe we shouldn’t, they’ll get too busy.
Thanks!”

– Ciney and Jan R.

Gas Furnace Installation in Westphalia, MI 48871

“They came and went and the only way I knew they were there is that I have a new furnace and AC. That is very cool.”

– Greg C.

Gas Furnace Maintenance in Dewitt, MI 48820

“Extremely Professional took time to explain and reassure us that all was being done to improve our heating situation. This guys a keeper! Will recommend your company to others. Thanks so much Mike for all you did!”

– Alicia S.


ESI Heating proudly provides HVAC service to Portland, Dewitt, Grand Ledge, the Greater Lansing area and the surrounding communities. Visit our service area page for more coverage details, call us at 517-647-6906, or request service online today.

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