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Is it time to Replace Furnace?

When should you replace furnace?

It is getting cold outside and the last thing you want is to return to a frosty home. Were you thinking to replace furnace last winter season but never made a decision? The smart move is to examine your heating system before it causes you troubles with below zero temperature outside.

Is it time to Replace FurnaceHow do you determine if you need to replace furnace? The first thing you need to check is your furnace age. If you are considering a replacement it’s probably been there in place when you moved in to your home. Checking the age of the furnace can be as simple as looking at the owner’s manual or viewing rating plate with the model number or date of the manufactory. Some cases may require additional work or calling the manufactory with the model number.

Average lifespan of the heating system is 15-20 years but some equipment can last even longer than that. However if your furnace is over 15 years of age it is a good idea to replace furnace with a high efficiency reliable model. Many older furnaces are mid efficiency models which not only can fail you due to its age but also are much less efficient and consume a lot of energy.

If your current furnace is mid efficiency with original AFUE rating of 80% it might be time to replace furnace. With time efficiency rating of mid efficiency furnaces decreases and can drop to as low as 50% total operating efficiency. When you replace furnace to high efficiency model you can improve your heating efficiency by up to 45%. Consider the savings this will bring to you.

Signs to replace furnace:

  • If your furnace needs constant repairs
  • If your energy bills are getting higher every year despite the consistency in consumption
  • Furnace is not heating your home to the desired temperature
  • There is an uneven hot air distribution in your home and some rooms stay cold
  • Your furnace cycles on and off more often than in the past
  • Your furnace is making very loud noise, buzzes and hums
  • Furnace is putting out excess dust and rust particles
  • You see visible sign of furnace rust, corrosion and cracks


If you furnace shows any of the above problem or you know it is far past its lifespan then call DeMark Home Ontario for a consultation. Our experts will provide you with more details of when it is time to replace furnace as well as address any technical questions you might have. Prepare your home for the winter season. Call us at 647-847-2998 or submit your request online.

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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.

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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!

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

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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.

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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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