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The key to knowing when to replace your furnace versus when to repair it depends on its age and how many more years you can expect it to last. But, rather than humming and hawing about these questions, there is a simple equation you can use to help you decide.

This equation compares the cost of repairing the unit to the cost of replacing it. Here’s the calculation you can use to decide when you should replace your furnace:

“Cost of Repair” x “Age of Unit (in years)” > “Cost to Replace Furnace” = Replace Furnace

Multiply the cost of the furnace repair by the age of the unit. If this number is less than the cost of replacing your gas furnace, then opt for the repairs. If this number is larger, it will be cheaper to replace the furnace.

If you’re living in Alberta, in the St. Albert/Edmonton area, and you’re still unsure, talk to a local heating company. With their expert knowledge about your particular climate, they will be able to help you make a decision as to whether you should repair or replace your furnace.

The most energy-efficient furnace is one that is ENERGY STAR certified and has an efficiency rating of 97% or higher. When you see an ENERGY STAR symbol on your appliance, you can be certain that it has been certified as energy efficient. 

When it comes to the type of furnace, gas furnaces are typically the most energy-efficient. Although preferred in some situations, electric and oil furnaces are less efficient. Therefore, gas-powered furnaces are recommended.

The heating professionals at ProSolutions PHAC recommend the following high-efficiency furnaces:

• TRANE S9V2-VS Gas Furnace
• AirEase A97MV High-Efficiency Modulating Gas Furnace
• Goodman GMVM97 Modulating, Variable-Speed Gas Furnace

Shopping for a new furnace and wondering what are BTUs? BTU stands for British Thermal Unit – a value traditionally assigned to heat. Technically, a single BTU is the amount of energy that is necessary to increase the temperature of one pound of water by one degree Fahrenheit at sea level. As far as a heating system goes, BTUs refer to the amount of heat that a furnace is able to output.

When it comes to furnaces, the larger the square footage that needs to be heated, the more BTUs you’ll require. For example, it’s suggested that a 1,500 square foot home has a furnace that is able to output 45,000 to 90,000 BTUs.

It can cost anywhere from $150 to $1,500 to repair a furnace, depending on the issue. If you’re in the Edmonton area, the average cost to repair a furnace will be around $700.

Make sure the furnace company you choose to do your repairs is upfront with their pricing. They should be able to provide you with the price ahead of time so that you know exactly what to expect before moving ahead!

Want to save some money? Often professional heating and plumbing companies will offer a Service Partner Plan – we call ours the ProComfort Plan. This type of plan will help you keep on top of the regular maintenance your furnace needs for a fraction of the price. Regular furnace tune-ups and maintenance will help prevent any major issues, saving you from repairs and replacements that could cost you thousands of dollars! With plans like this, there is often a discount for members, meaning you’ll save money with every visit.

Furnace filter replacement is important if you’re using your AC. Maybe not as frequently as in winter when monthly changes are best. But check the filter regularly to see that it is functioning properly, and replace when necessary.

If you run your AC during the spring or fall, you will want to check your filter more often since this time of year has more allergens and particulates in the air that can cause you to become sick.

Boilers can last a really long time. In fact, the average lifespan of a boiler is 10 to 15 years. In order to extend the life of your boiler, it’s important to ensure that it is properly maintained and serviced on a regular basis. Even the best boiler will require maintenance and repairs from time to time.

If your boiler is giving you signs that it needs attention, make sure to hire a professional heating company to do the job. This will ensure your boiler lasts as long as possible. Some signs to keep an eye out for include: low water pressure, no heat coming from your radiators, banging noises, a pilot light that keeps going out or isn’t blue.

The size of the furnace you’ll need largely depends on the size of your home. Size recommendations based on square footage are:

1,200 square foot home: 36,000 to 72,000 BTUs
1,500 square foot home: 45,000 to 90,000 BTUs
1,800 square foot home: 54,000 to 108,000 BTUs
2,100 square foot home: 63,000 to 126,000 BTUs
2,400 square foot home: 72,000 to 144,000 BTUs

Other factors that affect the size of the new furnace installation you’ll need include:

• Climate zone (for example, Edmonton is in Climate Zone 5)
• Quality of insulation
• Window thickness
• Ceiling height
• Number of people living in your home
• Preferred temperature
• Size and state of the basement

For more info om furnace shopping, read our full article on “how to choose the right furnace“.

There are several steps involved in installing your new furnace. These steps will vary depending on the furnace you choose, your home’s existing furnace system, and any changes you want.

1. Align the new furnace with existing gas lines and ductwork
2. Connect and seal to the ducting system
3. Connect intake and exhaust pipes
4. Connect the gas line
5. Connect the furnace to the electrical supply and thermostat
6. Connect the furnace to a drain hole

At this point, it’s important to check your work, make sure everything is connected properly and there are no gas leaks. 

Please note: these steps are extremely simplified and meant to provide an overview to understand the professional furnace installation process better. It is highly recommended that you have your furnace professionally installed in order to avoid dangerous problems and issues with your new furnace. Having to get furnace repairs on your new unit would not be covered under warranty without professional installation.

Hiring a professional will be more costly initially but will save you money in the long run.

Here’s how long it takes to install a new furnace.