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HVAC Maintenance & Repairs, Toronto and GTA

DeMark Home Ontario Inc has cost effective maintenance and service programs that will help you extend lifetime of your home equipment, reduce energy consumption and bring you peace of mind. We take your comfort seriously.

HVAC Technician Working

Please contact us to book your preventative maintenance appointment or a service call and technician will be in your home in no time.

A pre-seasoned maintenance of your furnace, air conditioner or humidifier will ensure your equipment is performing at its manufacturer standards and will improve your air flow and the quality of the air you breathe.

Your heating and cooling system is one of the most important equipment in your home. Without cooling your hardware can wrap and without heating your pipes can freeze and burst. Maintaining your equipment will keep your home from damages and also bring you comfort all year long. Your equipment need to be regularly maintained to maximize its efficiency and reduce energy costs.

Our team of highly trained and fully licensed technician qualified to service and install all types of heating, cooling and refrigeration equipment. Service technicians have the skills and tools to quickly diagnose the problem, offer the right solution and get your equipment up and running in no time. DeMark Home Ontario’s preventative maintenance programs will assure customers of fewer breakdowns and problems and extended life time of the equipment by eliminating small problems before they escalate to extensive and expensive repairs. Waiting for equipment to break down is very costly.

Additional Heating and Cooling Information

Renting your AC, Furnace or both units is affordable, easy and completely worry-free

When you rent AC, Furnace or both units through DeMark Home Ontario Inc from Summitt Home Services, you’re joining Ontario’s most affordable, worry-free rental program.

Furnace Service and Maintenance matters more than you might think

To increase the life and efficiency of your furnace, follow these simple maintenance tips.

When winter is in full swing, chances are your heating system is working hard to keep your home warm.

Financing and Purchasing a Furnace and an Air Conditioner is more affordable than ever.

Save up to 45 % on your energy costs when upgrading from your old furnace and/or air conditioner to one of our Energy Star certified high efficiency equipment. Take advantage of our worry free programs and help save the environment by reducing your carbon footprint.

Rebates and Credits available for High Efficiency Equipment upgrades

By upgrading to new energy efficient equipment you are not only reducing your energy consumption and bills but you are also doing your part in greening the environment i.e. being environmentally friendly.

Our Service Experts can also offer you a replacement of equipment with high efficiency furnaces and air conditioners that can significantly lower your utility bills should you require an upgrade. You will receive a thorough consultation and an estimate on the desired equipment which includes site visitation and a quote preparation that meets your needs and budget.

Easy Rentals...

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


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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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