What Is a Furnace Efficiency Rating? + What It Should Be

Everyone wants their furnace and other home appliances to work as efficiently as possible, right? But what does that actually mean?

  1. Does it mean using less power to run a furnace?
  2. Does it mean lower heating bills?
  3. Does it mean tax rebates or other financial benefits?

Chances are, if your home was built in the last 20 years, you definitely have an efficient furnace installed in your home. But before that, it might not be the case.

Before the 1990s, efficiency ratings weren’t a thing, but now, if you don’t have a good furnace efficiency rating, it could be a deal breaker. If you want to know what furnace efficiency really means and what you should look for in your own home, this guide can help.

The Benefits of Having an Efficient Furnace

One of the most obvious benefits of having an efficient furnace is that you’ll save money on your energy bills. A more efficient furnace will use less fuel to heat your home, which means you’ll see lower bills each month. In addition to saving you money, an efficient furnace can bring the following benefits:

furnace efficiency rating gloves

A Smaller Carbon Footprint 👣

Carbon footprint is the amount of carbon dioxide and carbon compounds emitted due to fossil fuels consumption. A carbon footprint is measured in greenhouse gasses, and an average carbon footprint is between 16,000-22,000 pounds, while a “low” carbon footprint is anything below that.

A standard furnace has a carbon footprint of around 14,000 pounds, while a high-efficiency furnace has a carbon footprint of 10,500 pounds. This might not seem like much of a difference, but it does make a difference over time.

Fewer Emissions ⛽

Another benefit of having a more efficient furnace is that it emits fewer harmful toxins and chemicals into the air. This is not only better for the environment, but it’s also better for your health.

Efficient furnaces use less fuel to heat your home, which means there are fewer emissions released into the air. These emissions can cause respiratory problems, so it’s important to make sure your furnace is as efficient as possible.

Lower Risk of Fire 🔥

Having an efficient furnace is that it lowers the risk of fire. If you have an old, inefficient furnace, there’s a greater chance that it will overheat and start a fire. On the other hand, an efficient furnace uses less fuel and produces less heat, which means there’s a lower risk of it overheating and causing a fire.

Longer Lifespan ⏳

Another benefit of having an efficient furnace is that it has a longer lifespan. This is because an efficient furnace doesn’t have to work as hard as an inefficient one. As a result, it experiences less wear and tear, which means it can last for many years without needing to be replaced.

More Compact Design 🤏

If you’re tight on space, an efficient furnace is a great option because it’s more compact than an inefficient one. This is because efficient furnaces use less fuel, which means they don’t need as much space to store the fuel. As a result, they’re smaller in size, which makes them a great option for small homes.

What Is a Furnace Efficiency Rating?

A furnace efficiency rating is a measure of how efficient a furnace is. The higher the rating, the more efficient the furnace.

There are two main types of furnace efficiency ratings: AFUE and HSPF.

AFUE stands for Annual Fuel Utilization Efficiency, and it’s the most common type of furnace efficiency rating. It measures the percentage of heat that a furnace produces compared to the amount of fuel it uses.

For example, if a furnace has an AFUE rating of 80%, that means it produces 80% of the heat it uses to heat your home. The other 20% is lost through the flue or chimney. Before the National Appliance Energy Conservation Act of 1987 required new furnaces to be at least 78 percent efficient, furnaces at the time were releasing up to 40 percent of their heat outside— yikes!

Today, you’ll find much more efficient furnaces, with the standard being at least 80% efficient or more. Furnaces with furnace efficiency ratings of 90% would be considered a high-efficiency heating system.

HSPF stands for Heating Seasonal Performance Factor, and it’s the second type of furnace efficiency rating. It measures the amount of heat a furnace produces compared to the amount of energy it uses.

For example, if a furnace has an HSPF rating of 9, that means it produces 9 units of heat for every unit of energy it uses. Furnaces with higher HSPF ratings are more efficient than those with lower ratings.

furnace efficiency rating worker

Understanding the Efficiency Rating of Furnaces

We just threw a lot of numbers and acronyms at you, and it can be hard to understand, so we’ll try to define them a little better.

To determine a furnace’s efficiency rating or its Annual Fuel Utilization Efficiency, you need to do a little math. You’ll need to take the amount of fuel supplied to the heater and divide it by the amount of heat produced by the unit aka BTUs (British thermal units).

For example, if your furnace has a rating of 78%, 78% of its energy is actually being used for heating your home, while the other 22% is being lost through chimneys, basement walls, or other inefficiencies in the system.

Save Money With a New, Efficient Furnace

While the upfront cost of a new furnace may be higher than repairing an old furnace, you’ll save money in the long run because of the increased efficiency. In fact, you could save hundreds of dollars every year on your energy bills.

Plus, you may be eligible for certain rebates or tax credits when you install a new, efficient furnace. For example, you may be eligible for a federal tax credit of up to $500 if you install a qualifying high-efficiency furnace in your home.

To find out if you’re eligible for any rebates or tax credits, check with your local utility company or the government’s Energy Star website.

The most important thing to remember when shopping for a new furnace is to look for one with a high-efficiency rating. The higher the rating, the more efficient the furnace, and the more money you’ll save on your energy bills.

Hire Aquarius Home Services for Your Furnace Needs

Aquarius Home Services has been in the business of keeping homes warm for years. We’re a locally-owned and operated business, and we take great pride in our work.

When you hire us to install your new furnace, you can rest assured that it will be done right, with energy efficiency being a priority. We’re licensed, bonded, and insured, and our technicians are highly trained and experienced. 

Contact us today to save money with a new and improved furnace!

mavis eng
mavis eng
1721659008
sandra lee
sandra lee
1721519155
Nina Sebregts
Nina Sebregts
1721407360
Ethan did a fantastic job! He did a great job analyzing the system, providing recomendations and information needed to make an informed decision. He took his time explaining what was done and why. Thank you!
John Teichroew
John Teichroew
1721399810
Thumbs up for... (1) GOOD COMMUNICATION, between the office/dispatcher and service technician and, to be appreciated even more so, between the technician and ourselves, the homeowners, by keeping us posted on his current timetable and probable ETA; (2) careful evaluation of our split-ductless AC system and its units, both inside and outside the house; (3) upfront and forthright TRANSPARENCY from the service tech, showing us both existing problem areas as well as potential problem areas, and apprising us of precise cost(s) involved in rectifying those situations; (4) a demonstration of professional expertise in identifying the primary problem - in this instance, an ever-so-slight but incremental leak of coolant; (5) SUCCESSFULLY making the necessary repairs and restoring the system to proper functionality - which, ultimately, is what we were in pursuit of; and (6) throughout this whole process, encompassing a period of more than three hours, Aquarius' service tech, David Boggie, was altogether CORDIAL and PERSONABLE.Thank you!
Stephanie Thomas
Stephanie Thomas
1721339023
Nick and his apprentice Tim were amazing. Very thorough and took the time to explain everything! Very upfront with the issues found and explained all my options. I would highly recommend them.
Alan Gengenbach
Alan Gengenbach
1721337972
Jeff Lorenz
Jeff Lorenz
1721335367
Eric was very professional did a great job!
T B
T B
1721326516
Brian Newell
Brian Newell
1721323892
Casey and Adam were very friendly and professional. They answered all my questions
Candace Lovett
Candace Lovett
1721319933
Where are my pictures
Audrey DeYoung
Audrey DeYoung
1721308525
Matt Kallenberg
Matt Kallenberg
1721271096
Nick and Tim were great. Nick really knows his stuff and is super thorough. I would definitely recommend him
Bill Bush
Bill Bush
1721257086
mary bond
mary bond
1721255131
Our water heater went out on Fri evening. We called Aquarius early Sat morning and they said earliest they could get out was Mon. On Sun I received a text confirming our Mon appointment but on Mon morning they called and said the earliest they could get to us was the following week !We should be without hot water till then ? We are not a new customer…. 5 months previously we had a new furnace and air conditioner installed at quite an expense. I am appalled at their service or rather lack there of ! As an established customer they felt waiting approximately 10days without water was acceptable Bad, Bad, Bad !Two weeks later…The air conditioner Aquarius installed in Dec failed to cool when we turned it on on our 1st warm days. After the poor experience I had had with them I didn’t want to deal with them again but since it was under warranty I had to. We were told we would have a technician out Wed morning. After waiting at home all day they called and canceled at 4pm. We were rescheduled for Fri morning. We had several calls during the day with updates At 5:22 pm we received a cal the tech would be here at 6pm. We cancelled our dinner reservation and are awaiting his arrival.I realize our air conditioning is not an emergency but we have spent 2days waiting for our scheduled service. This is in addition to the 10days they wanted us to wait for a new water heater(which I do think is an emergency) I feel bad for the tech who I’m sure has had a long day and must now come at 6 on a Fri evening. Once again I repeat Aquarius has failed us again !!Wow !!!Now July ….it continues !! The duct from our air conditioning system has come loose and is spewing cold air in my basement. A service technician arrived and said the wrong connection was used. He said he would order the right part and return the next day. (Wednesday) The appointment was scheduled for today for between 12 - 3. When no one arrived by 3pm, I called and was told the part hadn’t arrived and they would reschedule for next Monday…5 days out.UGH…. I would have thought someone could have called before I wasted several hours waiting and now I can look forward to several days without efficient air conditioning and another day of waiting for a technician. Life is too short to have to deal with such repeated poor work and lousy service !! Oh, but they did say they’re sorry 😢
Sim Ngiratregd
Sim Ngiratregd
1721248048
Micah Williams plumbing technician performed excellent job inspecting our house plumbing system, recommended new water heater because the existing one is over 17 years old. Within 4.5 hours the new water heater was installed with quality and workmanship exceeding my expectations. The purchase price was great as well as the purchase financing option. Over service rating is Excellent!
Cathy Luk
Cathy Luk
1721247854
I was very happy with Brent'service. He was professional and patient in explaining the problem he found with my AC. If future problems arise, I will definitely ask for him.
Melissa Cain
Melissa Cain
1721247236
Aquarius has always had amazing customer service. We recently had our furnace and ac replaced and their team have been informative and personable while maintain professionalism. Thank you to Nicholas Sarinske, Mike Sippel, Matt Kellenberger, Nate Huettl, and anyone else I may have forgotten.
Dan Carlson
Dan Carlson
1721235114
Boni Beisell
Boni Beisell
1721154216
EVERYONE at Aquarius is extremely customer oriented! From first contact with customer service: "Thank you for calling Aquarius Home Service, How can I make you smile today?" (that happily delivered addage always does), all the way through to their exemplary Home Service techs, I have always felt well taken care of; as though their #1 goal was to insure my needs be met, to my highest satisfaction. Aquarius Maintenance technicians are polite and respectful of my home and personal time. They go to great pains to take pictures of any equipment they're working on & point out current issues along with potential future things to be aware of - all in plain English - so I can make informed decisions on fixes needed now or plan pros & cons of 'holding off for a while'. They don't push, they give facts, share expertise, let me decide. . . . and make me smile, everytime.I will happily encourage friends & family to call Aquarius for home service.
LuAnn Suilmann
LuAnn Suilmann
1721152199
Ethan was polite, knowledgeable, and efficient on time. Well done. Very happy.
Dave W
Dave W
1721144718
Very good communications and tech skills. Good info on repair or replace decision.
Ed Bailen
Ed Bailen
1721136513
Nick and Tim did a very thorough job in diagnosing my mom's furnace/ac problems.I would highly recommend them.
Jack Livingston
Jack Livingston
1721093363
Nicholas was an extremely helpful technician. He was thorough and fixed our issue at a reasonable cost. We were impressed with the customer service we got both from him and everyone at Aquarius. Thanks for getting us in within 24 hours, fixing our air conditioning and explaining what was going on.
Sandy Oldeen
Sandy Oldeen
1721089662
Mike Lauer from Aquarius came to service my A/C. Mike was so kind in informing me of my options. He had my trust right away. In the end I purchased a new unit. Mike is definitely an asset to Aquarius. Thanks for the good service Mike!
Karen Arcand
Karen Arcand
1721088008
Leigh Griffith
Leigh Griffith
1720985156
Nick did a nice job of showing us what was affecting our AC and the problems that were looming with our furnace.
Scott Moore
Scott Moore
1720976548
The technician worked hard and did a great job.
Mary Cole
Mary Cole
1720816564
Had technician, Nathan come to perform yearly check on AC Very knowledgeable and explained everything. Bonus points for fixing the pesky rattle from the ductwork!
Jessica McDougall
Jessica McDougall
1720815008
Aquarius has consistently been great at fast response times, responsive communication, and willingness to teach about the maintenance procedures they perform. We will never go back to anyone else!
Nancy Melvin
Nancy Melvin
1720809794
Provided prompt and professional service.
Sean M
Sean M
1720808556
Stephen Clonkey
Stephen Clonkey
1720801379
Riley was very thorough and communicated with us very well.
Jessica Kohl
Jessica Kohl
1720723436
Mike C was my technician and he was AWESOME, very nice, knowledgeable, respectful inside my home (wore booties, didn’t touch newly painted walls, even picking up clumps of insulation on the carpet and putting in his pocket so it wasn’t on the floor, turning off lights) he was great!
Tim Peterson
Tim Peterson
1720718604
Highly recommend Aquarius Home Services. Mike was very professional and explained everything in easy to understand detail. Keep up the good work!
Natalia Yasama
Natalia Yasama
1720656615
There is no better technician than Riley !Very professional, honest , perfectionist. 11 stars service .
Karl Witt
Karl Witt
1720640365
Super great experience! Air conditioning went out at 10 o’clock in the morning and the technician arrived here by 1:45 and completed the repair in less than 45 minutes. Graham, the technician, was really awesome and did a great job with repair.
Bonster Bon
Bonster Bon
1720639807
He did a good job representing your company young man explain things thank you Ethan
JD Smith
JD Smith
1720631805
Excellent deal, sales person, and installation techs. Staff are friendly, they listen to you, and are professional! Two thumbs up! Thank you Thomas, Mick, and Jeff!
Hans Schroeder
Hans Schroeder
1720627228
Mary Schmuland
Mary Schmuland
1720616091
Professional, proficient, courteous, and going above and beyond! We were extremely satisfied with John and his plumbing services; removed garbage disposal, connected new faucet and soap dispenser, rectified hook-up with Aquarius water filter to our refrigerator, and installed new sink drains. He was prompt, worked in a congested cabinet, and did a superb job with attention to details. Would be glad to trust him and his expertise, again! Pleasant and focused!
Carmelo Panetta
Carmelo Panetta
1720569940
Brandon did a great job cleaning five mini split airconditioning, including fixing a broken one.
Ayrlahn Johnson
Ayrlahn Johnson
1720566419
The Boogieman came out and fixed our furnace and AC in one fell swoop. Got them both working. We were heated up a bit but now Cooler heads 😎 are prevailing!
Gregg Barker
Gregg Barker
1720566016
Riley and Brent did an awesome job. The communication with scheduling and knowing when someone was coming was frustrating as the time kept changing.
Becky Hansen
Becky Hansen
1720565057
No pressure sales appointment tget went over all tge options, got an appointment with 3 days to have the install. The install guys gave ne s call ahead. They put in the nee furnace & AC unit, explained what they did and also showed us. They took ff the service call charge as we bought the units as it was not worth fixing (our AC was 41 years old we found out) Travis Lee and his partner were professional and very knowledgeable. Would highly recommend Aquarius
Denise Bratvold
Denise Bratvold
1720545466
Another seamless experience with Aquarius Home Services. The timely communication with Jeremy from before arrival continued as he worked through my water heater problem and options for solutions. Would highly recommended AHS.
LaNae Christenson
LaNae Christenson
1720536581
Chris came to evaluate a slow leak and quickly found the source of the problem. He gave the best and worst case scenario and got to work right away. I appreciated his candor and professionalism throughout the entire process and am very pleased with the result. I would definitely call again if needed.
Barb Galvez
Barb Galvez
1720535493
Tech was awesome, friendly and very well qualified for my AC tune ups.
melissa goldman
melissa goldman
1720478062
Just can't say enough good things about Aquarius. We've general contracted a couple of our own homes and have never worked with such professional, knowledgeable and kind people. We had a Kinetico system installed that Brian coordinated. Even though we have Kinetico water filtration in other homes and are familiar, he pointed out things that we didn't know. Paul worked on our plumbing and was equally wonderful. Just made everything so easy. We had a sizeable amount of electrical work done by Dave and AJ and Erik. Absolutely top shelf every step of the way. AJ even, on his own time, went in search of a scarce part we needed to finish the upgrades. He found it and finished in one day! AJ really went above and beyond throughout. They all did. Truly so grateful to the teams and can't recommend them highly enough.
Linda Thompson
Linda Thompson
1720473879
They installed a tank less water heater. We were very impressed with their work. Very knowledgeable and courteous. A GREAT team.
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