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How old is your furnace or air conditioner? Is it time to upgrade to a high efficiency furnace air conditioner?


High efficiency furnace air conditioner

high efficiency furnace air conditionerHeating and Cooling systems need to be upgraded to new high efficiency furnace air conditioner units on average 15-20 years from the installation. Knowing the age of your furnace and/ or air conditioner will help in determining if a new high efficiency furnace air conditioner should be in the budget this year.

Most of the newer units have a manufacturer’s date listed somewhere on the furnace/air conditioner; older systems may require a bit more digging. You can look at the serial number, which tells the manufacturer various pieces of information, including the age. Finding the serial number, however, may also require a bit of work.

Here are tips on determining your furnace and air conditioner age

  •  Look on the furnace surface/air conditioner for a paper or metal tag that contains a serial number and/or the manufacturer. This may also show an actual manufacturer’s date, depending on the manufacturer of the furnace/air conditioner. Turn off the power to the furnace/air conditioner – by either turning off the power switch or the master fuse to the unit — and look at the fan and fan blades. Older systems sometimes had the serial number stamped onto the fan itself, giving the necessary information even when a manufacturing label is absent. Look at the first four digits of the serial number once you find it. The first two digits can be the week of the year that the unit was manufactured, with the third and fourth number indicating the year. A serial number starting with 0193, for example, may have been made the first week of 1993. Some manufacturers have it the opposite way, first 2 digits are the year of manufacturer and second 2 digits are your week. Newer high efficiency furnace air conditioner often have installation date on the sticker.
  • Look for a sticker or tag that gives a date when the furnace/air conditioner were last serviced. This is usually common on gas furnaces/air conditioners and may list the date that the systems were installed. This can often give a close approximation of the units’ age.
  •  Call the manufacturer to get the age of the systems. Even without a serial number, a manufacturer’s rep may be able to look at a picture of the units to give an idea of the period in which they were manufactured.


  • If the company is out of business, having a home inspector or heating contractor look over the unit may be worth any fee charged to do so.
  • If your utility bills have raised dramatically over the years this could be a sign that your furnace and air conditioning units are old. Even if your furnace/air conditioner has a few years left in it, it may not be cost efficient to keep it. If your energy bills during the heating/cooling season are high due to the systems’ horrible efficiency, its time to get new high efficiency furnace air conditioner installed.


At DeMark Home Ontario your can learn more about buy high efficiency furnace air conditioner, efficiency levels, manufactory specifications and different brands available on the market.

You can also schedule Free In Home Assessment on your existing equipment to learn more about replacement options. If purchasing a new furnace is not in the budget we offer variety of flexible rent to own and financing options. Call us at 1-855-998-2998 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.

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!

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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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