
Fernand Denis is a family-owned heating and cooling company with over 40 years of satisfied customers. We are proud to serve both homeowners and building owners. We pride ourselves on the quality of our work and our customer comes first attitude.
We offer one of the widest ranges of heating and cooling services available, including installations and repairs for furnaces, air conditioners, boilers, fireplaces, heat pumps, wall furnaces and heaters, radiant floor heaters, and liquid propane installation, as well as duct cleaning.Licensed by TSSA and a member of the HRAI, we continuously strive to provide our customers with the best installation, repair, and service.
We have a wide selection of Lennox furnaces available for installation and will service or repair any make or model. All our furnace installations come with a minimum 5-year warranty. At Fernand Denis, we specialize in installing heating and cooling systems for new residential construction projects quickly and efficiently.
We offer one of the widest ranges of heating and cooling services available, including installations and repairs for furnaces, air conditioners, boilers, fireplaces, heat pumps, wall furnaces and heaters, radiant floor heaters, and liquid propane installation, as well as duct cleaning.Licensed by TSSA and a member of the HRAI, we continuously strive to provide our customers with the best installation, repair, and service.
We have a wide selection of Lennox furnaces available for installation and will service or repair any make or model. All our furnace installations come with a minimum 5-year warranty. At Fernand Denis, we specialize in installing heating and cooling systems for new residential construction projects quickly and efficiently.
Services
A Heating and Cooling leader in the Clarence-Rockland, Hawkesbury and Embrun area since 1976. Fernand Denis is a family owned heating and cooling company with over 40 years of satisfied customers in Glengarry, Prescott and Russell. It all began in 1976 when Fernand saw an opportunity. At that time, it was a home based business in St. Isidore with a single truck.
Contact us today regardless of whether you're looking for a quote, repair, tune-up or simply have a question. Contact Fernand Denis today for your furnace, air conditioner, boiler, fireplace, heat pump, wall furnace, and radiant floor heating service or installation. We also provide specialized duct cleaning, liquid propane installation and new construction services.
Reviews (14)
Mark Jefferys
Jan 24, 2022
Report
Used Fernand Denis for 3 different jobs in the last 3 months to service and repair my furnace, instal central air and lastly to replace the blower fan. They are on time at the agreed price, they left my basement clean and everything worked. The lady in the office is very helpful and I can easily recommend them.
Bob Zaluski
Dec 27, 2021
Report
Positive: Professionalism, Punctuality
The team that carried out the installation of furnace /ductwork, was very professional and personable. They answered all our concerns and provided a thorough explanation of our responsibilities towards proper functioning of the system. Please pass on our thanks for a task well done.
Services: Repair ducts & vents, Install heating system, Installation
The team that carried out the installation of furnace /ductwork, was very professional and personable. They answered all our concerns and provided a thorough explanation of our responsibilities towards proper functioning of the system. Please pass on our thanks for a task well done.
Services: Repair ducts & vents, Install heating system, Installation
Benoit Charbonneau
Nov 29, 2021
Report
Positive: Professionalism, Responsiveness
They had a competitive price and were the only company who responded with an installation date for the installation of a heating unit in my garage. They also took the time to explain everything before and after the job was done.
Services: Install thermostat, Install heating system, Installation
They had a competitive price and were the only company who responded with an installation date for the installation of a heating unit in my garage. They also took the time to explain everything before and after the job was done.
Services: Install thermostat, Install heating system, Installation
Joshua Gut
Nov 28, 2021
Report
Alex and Jahdel replaced a 20+ year old heating system in one fun little tight space in very good time and used carpets and swept up after in a very professional manner. Install was very neat and well organized and wasted no time. Definitely highly recommend them and will be calling them myself for future assistance when need be!
Gilles Blondin
Nov 26, 2021
Report
On Nov 9, 2021, we had our Air Conditioning change for a new Lennox and we can say that the team that came Alex and Jahdel did a wonderful job. Before starting the installation, they took the time to explain to us everything they would do and we appreciated very much. They were very polite and after the job was done, they cleaned all the garbage and brought it with them.
We are so happy to have chosen this company and Daniel, the person that came first to show us all their product was really helpful to guide us in choosing the Air Conditioning suitable for our house.
We give all of the 5 Stars
We are so happy to have chosen this company and Daniel, the person that came first to show us all their product was really helpful to guide us in choosing the Air Conditioning suitable for our house.
We give all of the 5 Stars
Chris Thompson
Nov 17, 2021
Report
We had two Mitsubishi mini split systems installed, one on the main floor and the other in an upstairs bedroom, both on interior walls. In order for the systems to be installed piping needed to be fished through bulkheads and attic space, which Matt was able to do with master precision. The final product installation is aesthetically pleasing and absolutely no mess was left behind.
Before starting the job the process was explained throughly and all our questions were answered with easy to understand explanations.
Matt and his team were a pleasure to deal with. I would definitely recommend Fernand
Before starting the job the process was explained throughly and all our questions were answered with easy to understand explanations.
Matt and his team were a pleasure to deal with. I would definitely recommend Fernand
Gayle MacLennan
Nov 15, 2021
Report
When we decided to replace a 48 year old furnace we contacted two companies. Fernand Denis was the only one who replied, and did so very promptly. Daniel explained to us how our system could work, and was very helpful. The two young men who installed our new furnace and air conditioner were very friendly, professional and courteous. I would highly recommend this company, and will definitely be telling people to not hesitate to call.
The Green Door Farm
Oct 30, 2021
Report
I purchased an old farmhouse and recently made a long distance move to the area. Having limited connections and knowledge regarding my options, finding the perfect heating system felt like a daunting task. From the very first interaction with the company where Daniel, with patience and a vast amount of knowledge presented my options to me, through conversations and follow ups with Elise in the office, right down to the punctual arrival of Nic, Mickael, Alex and Emma, my friendly and efficient installation team, I have felt cared for as a client. At every opportunity Fernand Denis Inc. exceeded
Heike Buhler
Oct 25, 2021
Report
From the first contact to installing, it went very smoothly!
We had two houses to convert to propane heating without ductwork, the recommended propane stoves are functional and beautiful. We have used them on colder days already and are very happy with the warmth they provide!
4 stoves where installed with wireless thermostats!
One stove and thermostat didn’t work, the replacement part was here within days , installed right away and now works as it should!
Communication with this business was outstanding and the installers where quite efficient and professional!
Will recommend this business
We had two houses to convert to propane heating without ductwork, the recommended propane stoves are functional and beautiful. We have used them on colder days already and are very happy with the warmth they provide!
4 stoves where installed with wireless thermostats!
One stove and thermostat didn’t work, the replacement part was here within days , installed right away and now works as it should!
Communication with this business was outstanding and the installers where quite efficient and professional!
Will recommend this business
Jane Case
Oct 12, 2021
Report
Positive: Professionalism, Punctuality, Quality, Responsiveness
New construction heating and cooling systems. Excellent service completed by a professional team. Ricky, Emma, Alex, and Jahdel. I would not hesitate to recommend this company and I absolutely will be turning to them to meet any of my future heating or cooling needs.
Services: Install thermostat, Install ducts & vents, Install AC, Install heating system
New construction heating and cooling systems. Excellent service completed by a professional team. Ricky, Emma, Alex, and Jahdel. I would not hesitate to recommend this company and I absolutely will be turning to them to meet any of my future heating or cooling needs.
Services: Install thermostat, Install ducts & vents, Install AC, Install heating system
Marie-Claude Titley
May 22, 2021
Report
Sebastien Lavoie
Apr 21, 2020
Report
Ils ont des travailleurs et vendeurs compétant qui ont su répondre à mes besoins. Ils ont fait du bon travail pour l'installation de divers système pour différentes applications au fil des années. (fournaise, tank à l'eau chaude, système radian, boiler etc.) Par dessus tout, ils assurent un bon service d'après vente.
Ginette Lamarche
Apr 16, 2020
Report
Daniel Grenier de "Service de fournaise Fernand Denis nous a donné les informations dont nous avions besoin pour l'installation d'un nouveau système de chauffage et pour l'installation du gas naturel. La rapidité à retourner ses messages est très apprécié. Nous le recommandons fortement. Bravo à votre équipe !!! 👍
Lise Lalonde
Mar 31, 2020
Report