Furnace installation at your place can be a challenging task. Many of us think that installing a brand new furnace is like plugging in the microwave or refrigerator. That is not the case. Each HVAC unit system requires specific requirements that match the location of the new unit. Only licensed gas fitters can take out a permit in Canada and install a furnace. However, if you are interested in learning how to install a new furnace for reference sake, we’ve got you covered. 

How your home furnace worksFurnace Installation Process 

As we discussed above, only licensed gas fitters can install furnaces in Canada. However, we have provided you below with a step-by-step guide on installing a new furnace for reference purposes. 

Choose the best furnace

Many factors go into the purchase decision such as climate, fuel consumption, furnace size, furnace efficiency, furnace type, etc.  See furnace buying guide.

Choose the best location

The next step is picking where to put the furnace. Selecting the best space for installation depends on the furnace type and your plans to fill the remaining space. 

All manufacturers provide specific instructions on how to install the furnace. For instance, there are particular requirements for ventilation and clearance.

Before starting the installation process, ensure that you clean the area of debris and dirt. 

If you install the furnace in your basement, ensure that you placed it on blocks about four inches off the ground.  The blocks protect the heating system against issues such as flooding. If rubber pads do not accompany the furnace, buy some to reduce the noise levels when the furnace is running. 

Ensure that you have removed all the instructions and the loose parts while unpackaging the new furnace. 

Decide where the drain and duct will run 

The second step is deciding where the condensate drain and ductwork will run. 

The return air duct can be on the side or bottom of the heating system. Cut an opening in the system for the return air duct. Look for the pre-marked spot on the new furnace.

After deciding which side to run the condensate drain on, position the furnace correctly. The furnace should slightly slope towards the exit of the condensate drain.  

zoning air duct systemEnsure the air duct system is connected  

After you position the furnace correctly, connect the furnace to the air duct system. Seal connections with duct sealant or foil tape. Avoid using duct tape as it doesn’t have a long duration. 

Connect the vent pipes 

After connecting the furnace to the ducts, connect exhaust and intake pipes. As said above, position the furnace at a slight downward angle to allow the condensation process to occur.  Why is your furnace leaking water?

Connect the gas supply 

Ensure that the gas supply is connected for your gas furnace. Ensure adequate ventilation and shutoff, and upon completion, check for leaks. 

Connect the electrical supply 

There are two types of electrical connections: a low and line voltage. The polarity is different for both connections. Ensure to wire the furnace as per manufacturer instructions.

Connect the condensation drain 

Connect furnace to drain hole with a hose. Learn how to fix a furnace condensation leak.

Check the newly installed furnace 

The final step involves starting the furnace and running it through a heating cycle. Ensure temperature outputs are in the correct position as per the manufacturer. Double-check for leaks and that the drainage is operating correctly.

Related: What Is Forced-Air Heating?

Final Word: How to Install a New Furnace

Furnace installation is a complicated job with many complex steps. Many furnace problems can occur at any moment. That is why Canadian regulations do not allow DIY furnace installations. Always contact a qualified HVAC professional to install a furnace. In addition, regularly scheduled maintenance for your furnace is essential to extend the life of your furnace and ensure that your furnace continues to run efficiently and safely.