The Most Energy Efficient Furnaces: Comparison Chart

The Lennox SLP98V Series iComfort Wi-Fi Control could save you up to 23% in heating costs over a standard furnace






Rheem Prestige R98V Series with EcoNet Control Center


AFUE ratings: 98.1 - 98.7
Capacities: 56 - 112 MBtu/hr
% Savings over a Standard Furnace: 20% - 21%



Bryant 987M Evolution System Series with Evolution Control


AFUE ratings: 97.2 - 98.5
Capacities: 60 - 120 MBtu/hr
% Savings over a Standard Furnace: 20% - 22%


The Bryant 987M Evolution System Series with Evolution Control has an AFUE rating as high as 98.5





Carrier 59MN7 Infinity 98 Series with Infinity Control


AFUE ratings:
97.2 - 98.5
Capacities: 60 - 120 MBtu/hr
% Savings over a Standard Furnace: 20% - 22%



Day & Night ConstantComfort VC 97 Series with Observer Control


AFUE ratings: 97 - 98
Capacities: 60 - 120 MBtu/hr
% Savings over a Standard Furnace: 20% - 22%




The higher the AFUE rating, the more efficient your furnace is

The 5 Most Energy Efficient Furnaces


How Is Furnace Efficiency Measured?



Furnace efficiency is determined by measuring the amount of heat that is produced by your furnace, captured, and then pushed into your duct-work and then comparing it to the amount that is lost with the vented combustion gases. Furnaces are given an AFUE or Annualized Fuel Utilization Efficiency rating, which will let you know how efficient they are. You can find out your current furnace's AFUE rating by looking at your user manual. Or, it should also be listed on the cabinet of your furnace. The higher the rating, the more efficient the furnace is.


There are 3 different categories of furnace efficiency. They are as follows:

80% AFUE: These furnaces have the lowest AFUE rating. They have a single heat exchanger and are a good choice if you live in a warmer climate or if you plan to stay in your home for a short time (five years or less.) They come in Basic and Better Performance models.

90% - 96% AFUE: These furnaces have a mid-range efficiency. Most of these types of units have secondary heat exchangers that are designed to capture heat from the exhaust gases. They are also available in Basic and Better performance models.

96.5% - 98.7% AFUE: This last category is the most efficient type of furnace. They all have secondary heat exchangers and come in Best performance models. If you want one of the most energy efficient furnaces then you should choose one with an AFUE in this range. Any furnace that has an AFUE rating that is greater than 95% will also be Energy Star certified.























The 5 Most Energy Efficient Furnaces



The following is a listing of 5 of the most energy efficient furnaces on the market. The data comes from Energy Star and all of these models are Energy Star certified. These furnaces are designed to use the least amount of energy for the best comfort. For a complete listing of all of the Energy Star most efficient furnaces, click here.


Each furnace listed below comes in a range of model sizes, referred to as "Capacity." Each model will have its own AFUE rating and % Savings, that is why a range is given. For a detailed breakdown of each model, click here.



Lennox SLP98V Series iComfort Wi-Fi Control


AFUE ratings: 97.4 - 98.7
Capacities: 66 - 132 MBtu/hr
% Savings over a Standard Furnace: 21% - 23%



Many companies claim to have energy efficient furnaces, but which ones are the most energy efficient models you can buy? With rising fuel costs, it's important to choose a furnace that is not only going to keep you warm during our long cold Canadian winters, but also save you money over the time that you own it. Read on to find out 5 of the most energy efficient furnaces available today and why they make the list. If you are looking for a furnace installer in the Ottawa region that you can trust to advise you on the best model and size of unit for your home and professionally install it for you, contact the experts at Draft Control now.

*Note: The higher the Annualized Fuel Utilization Efficiency (AFUE) rating, the more efficient the furnace will be. The following furnaces all have very high AFUE ratings and are not ranked in any particular order.

Draft Control - For the Most Energy Efficient Furnaces



If you are looking to replace your old inefficient furnace with a highly efficient one, contact Draft Control. Draft Control HVAC is a highly trusted heating and air conditioning company servicing the East Ottawa region. Unlike other companies, we focus on our customers and their complete satisfaction, not on the brands that we sell.  Whether you require installation, repair, or maintenance for your furnace, air conditioner, water heater, gas BBQ and fireplace, or boiler; you can trust Draft Control. Contact us today for all your heating and cooling needs..



"Draft control heating & Cooling was out today to replace the motor on my furnace in the middle of heat wave (35 degrees).  He was out to my place in 10 minutes (on a holiday no less!) and had it fixed and running in less then an hour.  Pricing was very reasonable.  Definitely recommend!"


-Ottawa Refacing


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Call now: 613-867-HEAT   (867-4328)