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.

The AFUE Calculator is disabled because JavaScript did not properly load.

To view the calculator please try your browser's refresh button, enable JavaScript, or try a different browser.

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 Replacement in Portland, MI 48875

“Clean efficient on time and very friendly. Would recommend ESI to anyone that ask” – Dave M.

Gas Furnace Installation in Lansing, MI 48917

“We had a new furnace/filter/humidifier/thermostat installed. Terry and PJ did a great job – neat, thorough, considerate. We had one issue: after they did their testing they apparently forgot to flip a switch on the gas valve and so after the showed us all about programming the thermostat and the furnace was seemingly working fine, they left and the furnace would not cycle back on. After I checked what I knew to do, and it still didn’t cycle back on, I called the after hours number and spoke to the on call person (whose named I failed to write down and now can’t remember) came right over, found the problem and corrected it. If you wonder at the 5 stars I rated them, I can only say that my clue that this is the company you want to work with is this: little oversights can always occur; what is important is the quality of the service recovery when those things happen. ESI was first rate.”

– Howard B.

Gas Furnace Installation in Westphalia, MI 48894

“We want to thank ESI Heating and Cooling for an excellent job in installing our new furnace and air conditioner. The technicians, Justin and Terry were very courteous and informative about the installation, details and clean up.

Very pleased with the services of ESI.”

– Larry T.

Gas Furnace Replacement in Portland, MI 48875

“Great work done by Justin and Terry. The work was clearly done the right way and they explained everything to us before they left. On top of that our house looked cleaner after they left than when they first got here! Thanks for everything Justin and Terry!”

– Mike C.

Gas Furnace Installation in Grand Ledge, MI 48837

“Justin & Terry installed a furnace and air conditioner for me. The service was performed very professionally and neatly. They spent the time in answering my questions in an informative, friendly manner and familiarized me with all the components and system operation. A job very well completed .”

– Ron F.

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.


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.