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Understanding Furnace Efficiency Ratings
Posted On: December 11, 2024
Furnace efficiency ratings are essential for homeowners looking to upgrade their heating systems. They measure how effectively a furnace converts energy (natural gas, propane, or electricity) into heat for your home. Here’s a breakdown to help you understand what these ratings mean and why they matter.
What Are Furnace Efficiency Ratings?
Furnace efficiency is typically measured by the Annual Fuel Utilization Efficiency (AFUE) rating. This percentage represents how much fuel is converted into usable heat versus how much is lost during operation.
- 80% AFUE: For every dollar spent on fuel, 80 cents goes to heating, while 20 cents is lost as waste.
- 90%+ AFUE: High-efficiency furnaces convert at least 90% of fuel into heat, minimizing waste.
The higher the AFUE rating, the more efficient the furnace, which can lead to lower energy bills and reduced environmental impact.
Types of Furnaces Based on Efficiency
-
Standard Efficiency Furnaces (80%-89% AFUE):
- More affordable upfront.
- May result in higher long-term energy costs.
- Common in regions with milder climates.
-
High-Efficiency Furnaces (90%+ AFUE):
- Higher initial cost but significant savings on energy bills.
- Often feature advanced technologies like two-stage heating or variable-speed blowers.
- Ideal for colder climates where heating demand is higher.
Factors Affecting Furnace Efficiency
- Age of the Furnace: Older models tend to have lower AFUE ratings. Replacing an outdated furnace with a modern one can significantly improve efficiency.
- Maintenance: Regular cleaning and servicing keep a furnace running at peak efficiency.
- Installation Quality: A poorly installed furnace, regardless of its rating, won’t operate efficiently.
Why Furnace Efficiency Ratings Matter
- Cost Savings: Higher efficiency reduces energy waste, leading to lower heating bills.
- Environmental Benefits: Using energy more efficiently decreases your carbon footprint.
- Home Comfort: High-efficiency furnaces often provide more consistent heating and better humidity control.
- Incentives: Many states and utility companies offer rebates for upgrading to high-efficiency furnaces.
Choosing the Right Furnace
When selecting a furnace, consider factors like your climate, budget, and home size. Work with a licensed HVAC professional to determine the ideal efficiency rating for your needs. They can perform a load calculation to ensure the furnace is appropriately sized for your home.
By understanding furnace efficiency ratings, you can make an informed decision that balances upfront costs with long-term savings and comfort.
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See What Our Customers Are Saying:
Aug 8, 2025
We are very happy to recommend this company to everyone. Our furnace broke down on Sunday morning. We phoned them and before noon Grant the owner showed up. He worked on the furnace for about a hour not wanting to give up to fix the problem. The furnace was 17 years old. I was the one talking about replacing it. End result was the next day it was all done. On the Sunday Bob came over with heaters to warm up the house. We decided to replace the water heater at the same time. Thanks Grant for the excellent work. Thumbs up.
Aug 8, 2025
Right on time. Explained how to work the HRV in a different way so the house would not be so dry. Changed my whole house water filter for me as well. Friendly, helpful, caring service!
Feb 18, 2025
Very pleased with the professional service that TwinTech Heating and Cooling provided in replacing my furnace. I got several quotes from different service providers. Their price was excellent and they explained the features very well. We are very glad we went with TwinTech and highly recommend their services.
Feb 18, 2025
We were new homeowners in need of a second opinion. TwinTech Heating & Cooling were Amazing and professional. Very knowledgeable and great service all around. Recommend to anyone looking for honest and reliable services. Treated with respect and care. Thank you Greg, Mitch and Bob!
Feb 18, 2025
TwinTech is an excellent and honest company! I called them for a second opinion after being told by another company that I needed to replace my furnace. Turns out this was not the case at all! I did not need a new furnace. TwinTech did not push to make an unnecessary sale and saved me from a huge expense. Bob and Mitch were extremely professional and above all honest! I definitely recommend TwinTech!
Feb 18, 2025
Amazing experience with TwinTech Heating & Cooling! Their team was professional, knowledgeable, and efficient from start to finish. They installed my new furnace quickly and left everything spotless. The technicians took the time to explain everything and made sure I was comfortable with the system before they left. Great customer service and fair pricing. I highly recommend them for anyone needing HVAC services!
Feb 18, 2025
Great experience all around. Bob was sharp and easy to talk to, and Greg handled the installation perfectly. Would hire them again in a heartbeat.
Aug 17, 2024
I returned from vacation to find my AC unit on the Fritz. After calling way too many places I connected with TwinTech. Ive used the company in the past for my furnace so I was happy when I recognized Greg at my front door. Hes great and the service is always top notch. Id highly recommend using twintech for honest, superior service in the Durham region. Thanks!
Aug 13, 2024
I called Twin Tech when my air conditioning stopped working. Greg came over to diagnose the issue - the same day. He was able to diagnose the issue and resolve it quite quickly. Although it was a quick fix, Greg was very thorough in explaining the issue and provided great advice. Not to mention, I felt very comfortable having Greg in my home - which I consider very important when hiring a service provider. Twin Tech will be my go-to from now on. Thank you!!
Aug 12, 2024
Just hired TwinTech Heating & Cooling to do an A/C Unit removal & reinstall to allow for landscaping access on the side of my house, and they were wonderful!
Bob, Greg & Mitch make a great team! Quick appointment times, super knowledgeable, expert troubleshooting capabilities & very customer service oriented.
I would highly recommend them for all of your HVAC needs! Great job guys!!
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