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St Catharines Furnace, Air Conditioner Installation

St Catharines Furnce Air Conditioner

Are you seeking any heating or cooling services (Furnace, Air Conditioner, Tankless ) for your household in St Catharines, Ontario?

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Rental/ financing, tankless, furnace or air conditioner easy Enbridge Gas billing service available for your convenience, no additional bills. If you’re looking for knowledgeable and professional technicians to service your HVAC heating and cooling needs then you’ve came to the right place. DeMark Home Ontario will provide you with the top quality high efficiency furnace, air conditioner, tankless or hot water heater installation/ upgrade and repair services to homeowners in St Catharines , Ontario area.

Request Quote To ensure that you receive the best quality services on HVAC equipment in St Catharines Ontario turn to DeMark Home Ontario your heating and cooling expert.

  • High efficiency Air conditioner (AC) and Furnace installation and upgrade in St Catharines
  • High efficiency Air conditioner (AC) and furnace rent
  • High efficiency Air conditioner (AC) and furnace financing in St Catharines Furnace
  • High efficiency Air conditioner (AC) and furnace Purchase/ Sale
  • High efficiency Air conditioner (AC) and furnace repairs and maintenance
  • High efficiency and mid efficiency Air conditioner (AC) and furnace inspection
  • Best high efficiency furnace and air conditioner (AC) rental rates in St Catharines
  • Cheap and affordable high efficiency furnace and air conditioner (AC) prices in St Catharines
  • Red tag clearance on your hot water heater, furnace
  • Rental water heater and tankless upgrade
  • Enbridge billing service available for water heaters, furnaces, air conditioners rent and finance in St Catharines


Our friendly and highly experienced staff will always be available to answers any questions you may have about your furnace, air conditioner (AC), water heater, tankless unit.

For a free consultation, estimate or to book your maintenance call please contact us:

TOLL FREE 1-855-998-2998

Easy Rentals...

get total piece of mind with our High Efficiency Furnace and Air Conditioner Rental Program.

Service Area

DeMark Home Ontario servicing area for HVAC-furnaces, air conditioners, heat pumps, hot water heaters, tankless units includes: Toronto, GTA, Vaughan, Mississauga, Brampton, Markham, Scarborough, Milton, Burlington, Niagara Falls, Oshawa, Pickering, Ajax, Aurora, Newmarket, Barrie and more. For a full servicing area please click here.


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  • Get A Quote Today! Free in-home estimate!
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Upgrading to a high-efficiency heating and cooling system offers more than energy savings.

Take advantage of these rebates today!


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.


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


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


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


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


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.


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


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

Some conditions apply


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


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.

  • 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.

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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