We're here to help with your furnace, ac, or water needs!
We offer same day installation on all furnaces, air conditioners & water heaters!
Weekly Promotions in The GTA!

Who We Are

GTA Leading Hvac Services Provider

Welcome to DeMark Home Ontario Inc your HVAC heating and cooling expert in Toronto, GTA and Ontario. We provide the best services in furnace, air conditioner, tankless and hot water heater installations, upgrades, repairs and maintenance by highly experienced and licensed professionals. You can now rent, finance or purchase High Efficiency furnace, air conditioner and water heater and enjoy the comfort of your home.

We Have A Dream And It Is Green

Our team of professionals not only focuses on assisting customers in selecting the most efficient and reliable service for their homes but also providing customers with an educated response on Government Programs and Rebates, Energy Saving Tips and Tools. We are here to provide homeowners across Ontario with value, efficiency, reliability and to help you save money and preserve our natural resources. DeMark Home Ontario servicing area for HVAC-furnaces, air conditioners, hot water heaters, tankless units includes: Toronto, GTA, Vaughan, Mississauga, Markham, Scarborough, Milton, Burlington, Niagara Falls, Oshawa, Pickering, Ajax, Aurora, Newmarket, Barrie and more. For our full servicing area please click here.

Heating

High efficiency furnace sale, rental and maintenance service.

Cooling

Buy, rent or finance your new high efficiency air conditioner.

WaterHeaters

Free upgrade of your old hot water heater to a new model.

WE’RE PROUD AUTHORIZED DEALERS OF

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As much as 60% of your yearly electricity costs is going towards heating and cooling your home. It makes sense to look for ways to reduce your usage.

With the HEATING & COOLING INCENTIVE you can receive up to $650 by installing an ENERGY STAR® qualified central heating or cooling system.

Take advantage of these rebates today!

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This item comes with absolutely free standard installation. We’ll ensure that the product is completely installed to code and fully functioning prior to leaving.

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Great news! Receive a brand new digital thermostat absolutely free when renting this HVAC product from DeMark Home Ontario.

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Great news! When renting a furnace or air conditioner, you’ll get your first 2 months absolutely rent free.

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Great news! When renting a furnace and air conditioner together, you’ll get your first 3 months absolutely rent free.

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This product carries a manufacturer warranty and we’re happy to explain it in full to you. Feel free to get in touch with us for more information or see the Warranty Information tab for more information

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If your order is placed and confirmed by 11am, we can have your HVAC product installed within the same day.

Certain conditions apply, not available on all products.

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Great news! When renting a qualifying water heater, you’ll get your first 2 months absolutely rent free.

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This water heater is subject to reduced rental rates based on the DHO discount program. Save money on your bill every single month!

Some conditions apply

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Save money on this item when buying it along with a qualifying high-efficiency furnace or air conditioner.

Some conditions apply

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Promotional code can be found on the eFlyer, Brochure or promotional email that you received from us.

*If you are an existing customer please refer to the mail or email that was sent to you after the installation of your equipment as it contains your promotional code. If you are having troubles locating it please call us and one of our Customer Service Representatives will be happy to assist you.

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  • Please fill out the form below in order to schedule service and be sure that your request will be processed promptly and you will hear back from us shortly.
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Notice for Power Vent Water Heater Customers

Effective August 2007, gas code requires technicians working on venting to replace black ABS vent pipe with white UL-certified vent pipe.

We will upgrade your venting pipes at no additional cost.

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