How To Buy The Best Gas Furnace?

Best Gas Furnace Buying Guide

How do most people go about buying a furnace? First, they call contractors and ask for estimates. To prepare this report, we did too. Today, More than thousands homeowners across Canada can upgrade their next residential heating and air conditioning system via online HVAC showrooms.

Size Matters

The furnace’s specifications should fit your needs. A furnace that’s too small won’t keep your house comfortable during extremely cold weather.

Partly to avoid that possibility, the furnaces in most homes are larger than necessary. Initial cost is only one of the drawbacks of that strategy. A furnace that’s too large will cycle on and off more frequently. That puts more wear on its components, wastes energy, and might cause the temperature to very uncomfortable. Also, a larger replacement furnace might require larger ducts. Without the right size ducts, airflow can be noisy.

To be sure of correct sizing and a proper installation, Use size calculator to determine what size of the furnace or air conditioning you need in your house. Such calculations take into account the age and the size, design, and construction of your house. Most manufactures highly advise regular maintenance after installation.  Our experience helped to confirm this advice. When we asked about the most common reasons for service calls for furnaces, contractors cited human error, inadequate maintenance, for example, or improper installation, twice as often as defective equipment. You can find our trusted brands by simply visiting Shop Now.

Efficiency Also Matters

Gas is currently the most common heating fuel and most new central-heating systems use gas. How efficiently a furnace converts gas into heating energy is reflected in its annual fuel-utilization-efficiency (AFUE) rating, which is measured as a percentage. The higher the number, the more heat the furnace can wring from each therm of gas. Since efficient furnaces generate fewer emissions, environmental considerations might also influence your decision.

Furnaces have become more energy-efficient over the years. A gas furnace made in the early 1970s typically has an AFUE of about 65 percent. The lowest efficiency allowed by law for new gas furnaces is 78 percent, and some new models achieve 97 percent, near-total efficiency.

The price of a furnace generally rises in step with its fuel efficiency. A furnace with a 90 percent AFUE might cost $1,000- $4000 more than a similar size unit with an 80 percent AFUE. But you can often recoup that additional cost through lower fuel bills over the life of the furnace, especially in regions such as the Northeast and Midwest, where winters can be harsh. How quickly you recover the investment depends on more than just AFUE. The electricity to run furnaces with different AFUEs can vary significantly. The climate,  insulation, and your local gas and electricity rates also affect payback times.

As you decide, it is highly recommended to choose a range of efficiencies and calculate the annual estimated operating cost of each model you’re considering, rather than simply estimating it. We can complete those calculations by plugging information on each unit’s AFUE and electrical consumption, local utility rates, and characteristics of your home into one of several computer programs designed to easily calculate estimates. To calculate your annual saving please visit HVAC Saving Calculation page.

You can make your home more energy-efficient in several ways. Turn down the thermostat in winter; just two degrees cooler will save you money and reduce emissions by about 6 percent. You might not even feel the difference, especially at night or when you’re out of the house—a programmable thermostat can help here.Normally Gas companies provide rebates for homeowners who would upgrade to a new thermostat. A new Smart Thermostat such as NEST or ECOBEE also helps to manage your spending better throughout the year. To find out how much your gas company (Enbridge or Union Gas) you can visit Rebate section of our website.

Repair or Replace?

Despite the improved efficiency of most new furnaces, it’s generally more cost-effective to repair a furnace than to replace it. However, if a key component such as the heat exchanger or control module fails, you’re probably better off replacing the furnace, especially if the unit is more than about 8+ years old. Furnaces typically last an average of 10 to 18 years. 

Most and Least Reliable

If you have to replace your furnace, you’ll be glad to hear that today’s more-efficient gas furnaces can save you up to $40 for every $100 you spend on fuel compared with older models.


Individual unit specifications are listed on the website. To find out how they work please read below:

Variable-Speed Blowers
These units can deliver air slower, while often making less noise when less heat is needed. That produces fewer drafts and uncomfortable swings in temperature.

Variable Heat Output
Available on some furnaces that have a variable-speed blower, this feature can increase efficiency and comfort by automatically varying the amount of heat the furnace delivers, usually between two levels. The furnace can thus deliver heat more continuously than could one with a fixed heat output.

What Else

Air Filtration
Fitting a furnace with an electrostatic filter, which uses an electrical charge to help trap particles or a high-efficiency particulate-arresting (HEPA) filter can reduce the amount of dust blown through the heating system. That might help people with asthma or other chronic lung diseases, but there’s little evidence that other people need such filtration.

Dual Heat Exchanger
Heat exchangers are the components that draw heat from the burned gas. To draw more heat from the air they burn, energy-efficient furnaces supplement the primary exchanger with a second exchanger. Because the exhaust gases in that second exchanger might yield a corrosive acidic condensate, the second exchanger is made of stainless steel, lined with plastic, or otherwise protected.

Ignition System
Fewer and fewer furnaces have a pilot light—a flame that burns continuously, awaiting the next command to ignite the burners. Furnaces with intermittent, direct spark or hot-surface ignition do away with the constant pilot light in various ways. That increases efficiency and is usually reflected in a furnace’s higher AFUE rating.

Most Basic furnaces often come with a 10-year parts warranty. Furnace repair cost could be costly sometimes up to $1000. Most people purchase extended protection plan warranty to be insured for all unexpected future work. 

What To Look For

A professional should install your gas furnace
Most HVAC contractors have the education, skill, and familiarity required to install your gas furnace properly and safely. This includes the ability to do brazing, electrical work, plumbing and framing if necessary. Only licensed & certified contractors should install your new furnace. If a contractor is unable or reluctant to supply this information, that’s a sign to choose someone else.

Cheaper is not better
Just because it is the lowest bid, do not fall into trap pricing. Natural gas furnaces are long-term investments, Finally, look for what can add value to your house.



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