The Premier Heating & Cooling Specialists in St. Catharines!

Guenther Heating & Air Conditioning is proud to offer  the finest heating & cooling products and services in Niagara for over 42 years. Guenther Heating & Air Conditioning HVAC technicians are trained and ready to handle any need you might experience including scheduled maintenance, complicated repairs and full turnkey installations.

If you are in need of a new furnace or air conditioner, we offer highly efficient products that can save you substantially on monthly utility bills while also helping protect the environment with R-410A refrigerant.

In addition to heating & air conditioning products, we also offer a wide array of home comfort control solutions from humidifiers, air cleaners, air purifiers to whole house heat recovery ventilators, tankless water heaters and thermostats to solve all your indoor air quality  needs.

Please do not hesitate to call 905-684-6214 with any questions you may have. Additional information is also available on our products page. Thank you for your interest in comfort control products from Guenther Heating & Air Conditioning !

Guenther Heating & Air Conditioning
31 Seapark Drive
St. Catharines, ON L2M 6S5

T. 905-684-6214
F. 905-684-6648



See what are clients are saying about us!

“As always we were most satisfied with Guenther’s staff and service.”

-          Don Stadler – St. Catharines

“I remain a loyal customer, you always do what you promise, when you promise”

-          D. Combe – Niagara on the Lake

“Prompt, efficient and friendly service. Wouldn’t go anywhere else. Thank you”

-          J & M Bradbury – St. Catharines

“ Your employees are very capable and very professional. We are pleased with the furnace and A/C”

-          W. Buschlen – St. Catharines

“Excellent company to deal with they have just replaced the air conditioner they put in 24 years ago”

-          Sandra Fredricks – St. Catharines

“Can’t sing your praises loud enough. Have already referred you to family & friends.”

-          Eric Woelk – St. Catharines

“There were many obstacles in the way & everything was handled with great care”

-          V.R. Moggridge – Niagara on the Lake

“As always your staff has been professional and courteous  in keeping our heating & cooling system working at its best. (Thank you) “

-          Mr. & Mrs. A. DeAlmeida – St. Catharines

“The service person was very efficient and helpful. Very personable also he explained what he was doing and gave helpful information.”

-          Larry Dugo – St. Catharines

“We were very pleased with the service on our furnace. The serviceman was prompt, efficient and very pleasant. Thanks so much!”

-          Carol & Vic Michitisch – Niagara Falls

Why Choose Guenther Ltd.?

  • Family Owned & Operated
  • High Quality Work
  • Years of Experience