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Correct Furnace Installation

Let's be honest, most consumers don't want to spend any more money than necessary for a replacement furnace. We understand. However, there is considerable downside if you shop with price as the only factor of importance.

An improper-sized or installed furnace will most likely not provide the heating comfort needed and cause you major headaches in future breakdown and repairs.


The number one cause of furnace failure is improper installation

Regardless of whether you choose Airdrie Air as your HVAC installer for a new furnace, make sure you decide upon a reputable company that will provide the following necessary steps for correct installation.

Sizing the Furnace

Sizing the furnace for your home is very important. Windows and construction material type are the main considerations of how much heat your home requires. This will involve a proper Manual J Heat Load Calculation. Just because a certain size of furnace is in the house, this does not mean the last company put the right one in. Always confirm.

Importance of Ductwork

The ductwork must be adequately sized for the furnace that is being installed (new furnaces have more air flow). Sometimes we find we have to add new return air drops, furnace bases, new runs and grills to handle the proper CFM ( cu ft/min). If you starve the furnace for proper air it will cause over heating issues and poor air circulation throughout the home (hot and cold spots).

Tip: Sometimes unfortunately we cannot modify ductwork throughout the house without ripping down all of the drywall. So we use what duct work is there. There are situations after a new furnace replacement, we'll discover the old metal return air registers will make a howling noise (air velocity to high causing the “harmonica effect” through the vent). We may recommend old metal grates be changed to plastic ones, as found in todays' new-built homes. This is why the HVAC industry has gone away from metal return air registers.

After Installation

When completing the furnace installation the furnace must be level or slightly aided towards the front condensate drain as per manufacturers instructions. Sizing of the furnace exhaust and intake pipes is crucial (2 or 2.5 or 3 inch) to make sure they’re not undersized causing air pressure switch issues and “No heating problems”.

After the job is complete, operational checks and tests are very important. We find many other contractors “flick the switch and run”. When we do our start-ups we check the temperature rise, gas pressure, amperages and static pressures to make sure it’s running at its optimal efficiency and air flow. We will make adjustments as necessary.

Consumer Maintenance

After the furnace has been set up and it is confirmed that it is running properly, the biggest maintenance for the customer can do, is to make sure the AIR FILTER is changed on a regular basis (as per instructions for that air filter. Some are every 2 months and some are up to 1 year). Some houses have a lot more dust/dirt, people, pet dander etc. causing the filter to plug up a lot faster, requiring more frequent replacement.

Also when in doubt, it is good practice to look at the air filter once a month to determine if it should be changed or not (only do this when the furnace is not running).

Furnace Maintenance

We recommend to have the furnace serviced every year as the new high-efficiency furnace’s have a condensate P-trap that has to be pulled out and cleaned. Over time it fills up with water and dirt which changes into mud. (If the p-trap plugs up the furnace will quit working). At the time of service we clean the flame sensor and also provide a complete furnace inspection to ensure everything is running safely and properly as per start up.