For over 40 years Denoco Energy System Ltd has been your local expert in all things heating, air conditioning and plumbing

Many services are offered to the residential and light commercial markets, from addressing your emergency heating issues, supply, install and servicing of furnaces, heat pumps, radiant in-floor systems, hot water tanks, air conditioners to plumbing for both new and existing homes.

Our Team Leader and owner, Dennis O’Connor likes to think outside the box to provide the best possible service to his clients.
Guiding customers through what can be an intimidating selection process, discussing the pros and cons of what is available to help clients decide how best to heat and cool their new or existing home. It comes from a practical and financial point of view, from an expert with answers.

We are all members of the same community here at Denoco.
If you need us for anything or have questions you can talk to us, we are not a call center.
We employ fully experienced, qualified and certified technicians.
Certified Gas technicians (G2, G3), Red Sealed Journeyperson Sheet Metal (308A and 308R), Certified Refrigeration Technicians (313A and 313D), Journeyperson Plumber 306A. We are certified by TSSA (Technical Standards and Safety Authority, and ESA (Electrical Safety Authority) Approved.

Our HVAC, Plumbing, Custom Sheet Metal Fabrication and Installation family is based in Smiths Falls and we service Eastern Ontario.

Denoco can help keep your home cool. Call or email us today, and let us show you how!

Give Us A Call

(613) 283-0574

(613) 704-0125

Office Hours


8 am - 4 pm

After hours service available

2 Victoria Ave, Smiths Falls, ON K7A 2P1, Canada

2 Victoria Ave

Smiths Falls, ON

K7A 2P1

Copyright 2023 © Denoco Energy Systems Ltd.