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Lily Home

Joseph Frederick

Troy, OH

Dec. 13, 2015

Over the past 14 years my air conditioner and furnaces from time to time have needed servicing. Mark Sweitzer is the only HVAC contractor I call. He, and later on with his son, have been doing the work, and they do such an outstanding job that I am compelled to write this Letter of Appreciation. Mark’s professionalism, technical expertise, and courtesy is extraordinary – far beyond what is normally experienced these days. In this day and age it’s rare indeed to find workers that go beyond the minimum level of performance. Mark and his son certainly do, and I thought it is important to let potential customers know. Their work reflects highly on their business. Whenever I need HVAC work there is no doubt about who to call.


Mark’s wife Jeri runs their office, and it’s amazing how much knowledge she has about HVAC systems. There have been times when she’s offered advice that fixed the problem so the job didn’t even have to be scheduled. They are a treasure and I truly appreciate them.


Some of the jobs required innovative thinking and a unique installation, and Mark has always excelled. I truly believe he treats us the same way he would treat a member of his family. He’s honest, a hard worker, his expertise is top-notch, and I wouldn’t even think of hiring anyone else. He’s the best, and I’ll always be a customer of his. And when Mark and his wife eventually retire (and I hope they never do), I know his son will carry on exactly the same way.

Bill Huffman

Piqua, OH

Mark Sweitzer Heating is a family business that is very efficient and honest. They are on time and don’t waste time on the job. When they leave everything is cleaned up and working. They explain how the furnace will operate and answer any questions. They recommend the furnace that will best suit your home. My house is a lot warmer and I use less fuel.


I would recommend them to anyone.

Richard & Gail Brandewie

Piqua, OH

Mark Sweitzer & his son have taken care of our furnace & air conditioning needs for the past 38 years, Gail & I have found Mark to be honest, knowledgeable, and ready to provide service on short notice. He repairs units rather than just replacing them whenever possible. In doing so he has saved us many dollars over the years.


I enthusiastically recommend Mark Sweitzer for all your furnace & air conditioning needs.

Mrs. Burelison

Covington, OH



Best in service & kindness!

Joyce Garbig

Piqua, OH

Mark has serviced my furnace & air conditioner for years. He is trustworthy and honest. His son Mark is following in his foot steps.

Christine Hutson

Piqua, OH

They were very professional and courteous. They made me feel very comfortable about my new furnace and how it worked.


I know I will be able to count on their quality and professional service in the future.

Darren & Tammy Langston

Sidney, OH

In June 2014, Mark Sweitzer installed a Trane XV95 furnace with the XL20I Heat Pump Trane Whole House Air Filtration System, and humidifier. We are extremely pleased with the complete system. Mark was very professional, he installed all components in a timely manner, and thoroughly explained how to use the system. We would highly recommend Mark Sweitzer Heating Cooling & Refrigerations, Inc. to anyone interested in replacing a system or a system in need of repairs.

We have been loyal customer's of Mark Sweitzer's heating, Cooling and Refrigeration, Inc. since Mark opened his business. During our association with them, Mark and his staff have installed our new furnace as well as our air conditioner and continues to service them each year.


We have enjoyed working with Mark and trust his expertise and ability to complete the necessary work at a reasonable cost and in a reasonable amount of time. He comes whenever we need him, and we highly recommend his reliability and workmanship.



Bob and Sue Dougherty

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