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Mark Serrenti started doing heating work twenty five years ago, for a local oil firm. When they left the business, Mark went into business for himself. National Furnace Company can fill all of your air-conditioning and heating requirements. We specialize in oil heating and equipment.
Reviews (10)
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Susan Staiger
Jun 19, 2022
Service tech was very friendly and knowledgeable. He helped us get our AC unit functioning and helped us decide on a replacement Service: A/C system maintenance
Scott Bigford
Jun 15, 2022
During a heatwave with temps about 100°, on a Sunday night, our A/C stopped working. National Furance was the only company willing to come out and fix it. The technician was professional and a nice gentleman. It was fixed with 5 minutes. He even changed our thermostat to a new one that we been putting off changing out. I will definitely recommend this company to anyone.
Hans Rohrbaugh
Jun 15, 2022
Every time I have used National Furnace, their work has been exceptional. Grant, the technician they sent today, was on time, professional, and did an excellent job. Service: Heating system maintenance
Amy Paul
May 28, 2022
Our outside air conditioner wasn't keeping our house cool enough. And it started about a week ago. I submitted a request earlier this afternoon and they came ASAP and Austin fixed it in an instant for a very reasonable price! They ended up putting about 3 pounds of Freon in our outside compressor and cleaned all the debris out. Thank you Austin for coming to fix our A/C system! Highly recommend!
Anna Pongo
May 20, 2022
They were so quick and helpful. I had called other air conditioner repair places and was told the first week in June was their soonest available date. I called National on a friend's recommendation and they said they could be at my place by 1:00 that same afternoon.
Tricia Trumbley
May 12, 2022
Chris was on time and very Professional! He Left everything very clean after his maintenance Check. National has been wonderful to work with every since the installation of the hvac system in our new home. Highly recommended! Services: HVAC system maintenance, A/C system maintenance
Steve Terrell
May 11, 2022
Time to learn how to do my own repairs. I was just charged nearly $174 for a run capacitor. It's a $25 (max, most are around $10-15) part that took the guy 10 minutes to install. I used to think National was an honest and reputable company but this is simply price gouging. Seems to be the norm in today's society apparently. Unbelievable. Shop around folks, and be sure to get prices before you have parts replaced.
Hubert Brunk
May 10, 2022
The folks at National Furnace have always been excellent to work with! I have used them for over 10 years to provide routine maintenance for my rental property as well as my personal home. They installed a new furnace in my home after detecting a carbon monoxide leak during a routine service call. Now they have just installed a new A/C unit in my new house. In both installations I have been extremely pleased with their work and would recommend them to others.
Craig Densberger
Jan 15, 2022
New Years morning, 1/1/2022, 3:30am, -15 degree windchill, our furnace was running but not igniting or blowing heat and the temperature in our home had dropped and it was getting very cold. I call National at 3:40am, the lady was very professional and understanding. She had an on call service tech call me. In a short time Nate called me and he was at our home not long after that. Nate diagnosed and explained clearly what was wrong, how to repair and replace the Direct spark igniter box, and the cost.

He called the supply house and got the part ordered. It took a few hours but he called and returned to install the new part. He also figured out what may have caused this and what to keep an eye on to make sure he resolved that issue and to call him if it didn't work. I have been in the trades for 30 years and I am a Superintendent of a service department for a large construction company.

I am Very Pleased with Nates professional work ethic and authenticity which reflects well on the company he works for and would recommend National and Nate to all my friends and family. Thank you Nate and National for warning our home.
Lisa Aschwege
Jan 09, 2022
Got home from work at 12:30 am, on a very cold night to find it freezing it 54 degrees in the house. He showed up within 30 minutes and had my furnace fixed. Had all the parts with him. I was very impressed having someone come that late and have a very reasonable service fee for doing so. Service: Heating system repair