I have used HEI multiple times (Furnace, Heat Pump, Water Heater, and a Radon Mitigation system) and have always had a very positive experience. I will use them again and recommend them to anyone. Friendly staff, highly educated owner willing to spend as much time as you need to get all your questions answered professionally, clean/professional technicians, straight forward no nonsense pricing without any surprises. They made some very tricky duct work that really saved some headroom in my basement and has worked out splendidly. I'm very pleased with the all around function and neatness of their work (plumbing, electrical, ducts, etc.), professionalism, code knowledge and compliance, and follow-up service and support, including after hour emergencies. read more

I Highly recommend Heinanen Engineering for your heating and cooling needs - five stars. They put in a Trane furnace and air conditioning unit in our home in 2014. When the city inspector came to the house, he said it was the most professional install he'd seen. Jeff Heinanen is extremely knowledgeable and guided us through picking the correct units for our house to obtain the best results. I appreciate that all appointments were kept and on time, the entire staff is responsive and respectful of your home. The quality of install and twice yearly maintenance service is worth the price - you get what you pay for and with Heinanen that means outstanding customer service. read more

We just had a tankless water tank installed last week. It took two days to complete as projected by Jeff. The workers were excellent, respectful, and clean. Our water tank is working flawlessly. My husband is very happy, and we all know, "A Happy husband is a Happy home!" Jeff, explained the product throughly and simplistically. He spent a couple hours with us answering all of our question and potential work at a later date. We recommend their services to anyone needing similar products. We will not hesitate to use their services with other projects, air conditioning, heating etc. Diane Tuite read more

Heinanen installed a Trane air conditioning unit for us in 2016 and they were extremely knowledgable, courteous and professional. I appreciated how thorough​ they were and that they laid tarps down to keep things clean during installation. They wore booties over their shoes whenever they came in the house. The owner himself came out to calculate exactly what loads were appropriate for our house. We are most appreciative that the owner, Jeff, was able to efficiently reconstruct a botched furnace that was installed by another contractor. read more

Heinanen Engineering, Inc. proves, day in and day out, that not all HVAC service providers are created equal. For years, they treated my elderly parents with a level of kindness that mirrors family, particularly Laurie who answers the phone, faithfully and with a sense of genuine benevolence. There's a litany of accolades one could bestow upon this company, no doubt. Suffice it to say, they purport themselves with a level of professionalism and aplomb that ensures I look nowhere else for my heating and cooling needs. read more

The service was exceptional. I was having issues with my furnace and we were just getting into our first deep freeze. They responded quickly and came out the same day to service my furnace. Very efficient and explained everything that they were doing. I had called a competitor and the earliest that they would be able to come out was 6 days later. I would have froze to death. The response I received was incredible. I have already referred someone to them. Would never go anywhere else. read more

Heinanen has been are preferred and ONLY heating / cooling company since they installed our new furnace and AC unit nearly seven years ago. They have one-of-a-kind superior customer service and truly treat our home with respect EVERY TIME they come for our semi-annual inspections and/or other service calls. They also treat our entire family as if it was their own family. I would highly recommend using Heinanen for anyone who needs any sort of heating or AC work!!! read more

Fall maintenance visit yesterday on our furnace via Heinanen Engineering and was very pleased with service from Jake. He came on time, actually called to ask if could come earlier, which worked for me. He was polite, informative, wore shoe covers and did furnace/humidifier maintenance in a timely manner although did not rush. We also use them to maintain our air conditioner in the spring and plan to continue using them in the future. Sheryl l& Bill read more

We moved into a house where Heinanen had installed the furnace, AC, and heat pump. It's more of a complicated system than we're used to, so I had Heinanen come out to service it when we first moved in. The engineers, technicians, and receptionist were all so helpful explaining exactly what we have, how it all works, etc. I won't ever use anyone else for service! I've been so happy with our experience with them and would highly recommend them to anyone! read more

Heinanen Engineering is the best. We've used multiple heating and cooling companies over the years and Heinanen is, by far, above all the rest. Service technicians are professional, curteous and leave your home without any mess. Information regarding service or install is given in a clear and concise manner. Office staff answers questions promptly and has great follow thru. Great attention to detail. read more

Great staff & excellent customer service! Extremely knowledgeable and was able to help us diagnose and troubleshoot what was going on. Even after calling several other local companies none of them had the time or knowledge to help us with our geothermal unit. Heinanen Engineering is a great asset to the community and surrounding areas. read more

Class operation, continue to be happy with services provided. Wouldn't trust anyone else with care and maintenance of our system. Even willing to pay a bit extra for the travel out to us in Tecumseh. Very professional, courteous, take pride in the work they provide. Will continue to recommend services to others in need! read more

It's hard nowadays to find knowledgeable, honest, and quality contractors, but Heinanen is the best around! From the owner, to the technicians, to the office staff, they provide high quality service at reasonable prices. They are knowledgeable about their work and have great customer service. read more

The Heinanen Engineering technician who came to our home the day before Thanksgiving was friendly, professional, prompt, efficient, and knowledgeable. We hope to not need heating or air conditioning service again for a long time, but when we do, we will definitely be return customers! read more

This company is great, they installed both my furnace and air conditioner about 8 years ago and have serviced them ever since. Their service people are always professional and helpful. The value they offer is well worth the price they charge. read more

Just had our furnace checked by Jake from HEI. Great customer service, explained everything, very customer oriented and friendly. I would highly recommend them. Richard H. Dexter read more

HEI came out quickly when our AC failed and got an older unit working well. Their technician was prompt and professional - would definitely call again for future needs. read more

Heinanen engineering is a class act. Professionalism from the time you call for service right on through to the service call. Thank you and keep up the great work. read more

We have always been pleased with the service and attention to quality provided by Heinanen Engineering. We highly recommend them for service or new installation. read more