Denoco Energy Systems Ltd.

Denoco Energy Systems Ltd. Maybe you know us as Denoco Heating and Air Conditioning or Denoco Plumbing and Heating. It doesn’

For 35 years, Denoco has been your local expert in all things heating, air conditioning and plumbing – providing comfort to Eastern Ontario homes. Many services are offered to the residential and light commercial markets – from addressing your emergency heating issues; supply, installation and servicing of furnaces, heat pumps, radiant in- floor systems, hot water tanks, air conditioners, to plumb

ing for both new and existing homes. These services are just the tip of the iceberg in terms of what Denoco has to offer. Their staff of polite, professional and competent tradesmen install, repair and maintain furnaces – conventional systems such as gas, propane, as well as air conditioning. But they are also able to guide customers through what can be an intimidating selection process, discussing the pros and cons of what is available – to help the client decide how best to heat or cool their home. It comes from a practical and financial point of view – from experts with answers. Denoco is a one-stop shop for completion of everything from roughing in plumbing for basements or new additions, to new bathrooms and kitchens. From frozen pipes to waterline and drainage re-piping, water pressure issues to sump pump repair and replacement, the list of services Denoco offers to the community is a lengthy one. Denoco’s owner, Dennis O’Connor likes to think outside the box to provide the best possible service to his customers. To add to their offerings, Denoco is also the local dealer for Yanmar Combined Heat and Power (CHP) units and Robur gas absorption heat pumps. CHPs burn either propane or gas in order to produce electricity and heat. Robur heat pumps use either propane or gas in order to create heat and air conditioning. O’Connor explains, “These units are obviously not for everyone, but if you have the right application, the installation of either can be extremely cost effective.” Another trend over the past number of years has seen citizens changing over to propane furnaces from oil. “While propane is cleaner and more efficient, your heating costs per year might actually increase,” O’Connor commented. But he emphasizes, “This depends on the comparative prices of those fuels at any given time. We try to make the homeowner aware of these considerations to help in the decision.”

Denoco’s dedicated staff attends manufacturers’ service classes, as often as possible, to ensure their skills are consistently upgraded and to guarantee they are learning the newest trends and techniques in the market. All of this lends itself to client fulfillment. “We guarantee customer satisfaction,” O’Connor says. “We have gained a lot of expertise over the 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.”

03/20/2026
Heat Pumps, Heat Pumps, Heat Pumps!  Ducted, Ductless,Geothermal- We know Heat Pumps.Home Energy Rebates are still going...
09/18/2025

Heat Pumps, Heat Pumps, Heat Pumps! Ducted, Ductless,Geothermal- We know Heat Pumps.
Home Energy Rebates are still going strong! Call today for your free in-home estimate and
SAVE SAVE SAVE
DENOCO 613-283-0574

Changing your furnace filter is one of the simplest and most important maintenance tasks for your heating and cooling sy...
09/17/2025

Changing your furnace filter is one of the simplest and most important maintenance tasks for your heating and cooling system.
1. Keeps the Air Clean
2. Protects Your Furnace
3. Extends System Lifespan
Call DENOCO 613-283-0574

Call Denoco 613-283-0574 to schedule fall maintenance
09/16/2025

Call Denoco 613-283-0574 to schedule fall maintenance

Its that time of year folks!Fall into comfort—book your HVAC maintenance today. 613-283-0574
09/15/2025

Its that time of year folks!
Fall into comfort—book your HVAC maintenance today. 613-283-0574

We are proud to be the sponsor of this fun, family event! Please share
07/16/2025

We are proud to be the sponsor of this fun, family event! Please share

06/04/2025

🌞 Don’t Sweat It Later—Get Ahead with Spring HVAC Maintenance!
Your HVAC system worked hard all winter… now it’s time to return the favor.
Spring is the best time to give your system a check-up before summer hits!

🛠️ Professional Tune-Up Includes:
✔️ Full system inspection
✔️ Coil cleaning & filter check
✔️ Performance test & efficiency check
✔️ Peace of mind heading into the hot months

06/03/2025

🌼 Spring Is Here! Is Your HVAC System Ready?
Don’t wait for the summer heat to kick in 🔥—now’s the perfect time to schedule your spring HVAC tune-up.
✅ Ensure your system is running at peak efficiency
✅ Catch small issues before they become big (and expensive) problems
✅ Improve indoor air quality & comfort
✅ Extend the life of your system

06/02/2025

🧊🔥 Tired of Your Old AC? Upgrade to Year-Round Comfort with a Heat Pump!
If your central air is on its last legs, don’t just replace it—upgrade to a heat pump and get cooling + heating in one smart system.
✅ Lower Energy Bills
✅ Rebates Available (call DENOCO for more information)
✅ Quiet, Efficient & Eco-Friendly
✅ Year-Round Comfort for Your Home
💡 Heat pumps cool your home in summer and heat it in winter—making them one of the smartest HVAC upgrades available.

REBATES-REBATES-REBATES-REBATES-REBATES-REBATES-REBATESTime to replace your old, tired, and inefficient central air syst...
05/07/2025

REBATES-REBATES-REBATES-REBATES-REBATES-REBATES-REBATES

Time to replace your old, tired, and inefficient central air system?
Do you heat your home with electricity, oil, propane, or wood?

Call DENOCO today for a free in-home estimate and to learn more about the rebates available! 613-283-0574
✅ $1,250/ton rebate available now for approved Cold Climate Air Source Heat Pumps
(based on application approvals)

Part 1: The KidsMom said, “Clean the playroom now!”So I said, “Okay!” and didn’t say how.I found a hole that goes down l...
03/28/2025

Part 1: The Kids
Mom said, “Clean the playroom now!”
So I said, “Okay!” and didn’t say how.
I found a hole that goes down low...
It made a hum like, whoa whoa whoa!

I tossed the balls—red, green, and blue.
They rolled right in, like they wanted to!
It was the best clean-up I ever did.
I’m a good helper. I'm a smart kid.

Part 2: The Mom
“You did a great job? Well, look at you!
But… where did all your balls roll to?”
I smiled, shrugged, and moved along,
No mess in sight—what could go wrong?

Later that night, when the heat came on,
I heard a noise… like something was wrong.
A soft little rattle, then a bounce and a bang—
Not loud, just weird, with a hollow clang.
Maybe it’s nothing… but maybe it’s not.
Better let Denoco give it a shot.

Part 3: The Technician
Thanks for the call—we’re happy to serve.
Let’s take a look, we’ll check every curve.
Opened the panel and what did I see?
A rainbow of plastic staring back at me.

“Well, I think we’ve solved the furnace fight—
Your kids fed it toys late one night.”
We cleaned it up and got things humming,
Then heard little feet down the hallway coming.
‘You found our balls?!’ they shouted with cheer.
I nodded and said, “Your hero’s here.”

Address

2 Victoria Avenue
Smiths Falls, ON
K7A2P1

Opening Hours

Monday 8am - 4pm
Tuesday 8am - 4pm
Wednesday 8am - 4pm
Thursday 8am - 4pm
Friday 8am - 4pm

Telephone

+16132830574

Website

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