Furnaces, Air to Air Heat Pumps (Ducted and Ductless), Geothermal Heat Pumps, Air Handlers, Boilers, Radiant (Radiant Design), Water Heaters (Conventional and Tankless), Fireplaces.



Denoco Energy Systems Ltd. offers a variety of Cooling solutions. We understand how important cool air is in the summertime. We offer repair, service, maintenance, and complete system replacement. If your current system is outdated, beyond repair, or inefficient, we can provide you options that will cool your home and save you money.



Everything from basements and new additions to bathrooms and kitchens.



Maintenance, service, repairs & second opinions, custom ductwork, BBQ gas lines, gas stove hook ups, HRV's.

Eastern Ontario’s Best Choice for All Your Heating and Air Conditioning Needs​

Maybe you know us as Denoco Heating and Air Conditioning or Denoco Plumbing and Heating. It doesn’t matter, we are Denoco and we are here to keep our customers satisfied.

In fact, we guarantee your satisfaction. We have gained a lot of expertise over the last 35 years and we know you will benefit from that. Whether it’s a plumbing service call for your kitchen sink or the heating and air conditioning installation for your new custom home or business, we expect that you will be as proud of our work as we are.

Our tradesmen are professional, polite and competent. As often as possible they attend manufacturers service classes in order to upgrade their skills and learn new techniques. Also, and we think this is important, your home will be as clean when we leave as it was when we arrived.


Take a look at what real Denoco customers are saying about their experience dealing with us.

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.