Office: (248) 471-3110  |  For Parts: (800) 466-3110
Office: (248) 471-3110
For Parts: (800) 466-3110
 
 
Hartford & Ratliff Co., Inc.

Understanding Furnace and Boiler Efficiency Ratings

Understanding Furnace and Boiler Efficiency Ratings

 
 

Understanding the Efficiency Rating of Furnaces & Boilers

A central furnace or boiler's efficiency is measured by annual fuel utilization efficiency (AFUE). AFUE is a measure of how efficient the appliance is in using electricity or fossil fuels (oil or gas) over the course of a typical year.

An all-electric furnace or boiler has no flue loss through a chimney. The AFUE rating for an all-electric furnace or boiler is between 95% and 100%. The lower values are for units installed outdoors because they have greater jacket heat loss. However, despite their high efficiency, the higher cost of electricity in most parts of the country makes all-electric furnaces or boilers an uneconomic choice. If you are interested in electric heating, you might consider installing a heat-pump system.

The minimum allowed AFUE rating for a noncondensing fossil-fueled, warm-air furnace is 78%; the minimum rating for a fossil-fueled boiler is 80%; and the minimum rating for a gas-fueled steam boiler is 75%. A condensing furnace or boiler condenses the water vapor produced in the combustion process and uses the heat from this condensation. The AFUE rating for a condensing unit can be much higher (by more than 10 percentage points) than a noncondensing furnace. Although a condensing unit costs more than a noncondensing unit, the condensing unit can save you money in fuel costs over the 15 to 20-year life of the unit.

Call Us Today • (248) 471-3110 • or • Fill Out Our Online Form
24/7 Emergency Service Available
Call Us Today • (248) 471-3110
• or •   Fill Out Our Online Form
24/7 Emergency Service
 
 
Contact Info
 
Address:  32708 W. 8 Mile Rd.
Farmington, MI 48336
Toll Free:  (800) 466-3110
Monday - Friday  |  8:00am - 5:00pm
24 hour emergency service • 7 days a week
Schedule an Appointment
 
Payment Options
 
For Furnace in Farmington MI, we accept most major credit cards.
 
We accept check for Furnace repair service provided in Novi MI.
We accept cash for Heating repair service provided in Farmington MI.
 
We accept all major credit cards, cash and personal checks. We also have several financing options available through Payzer financial.

 
Connect With Us
 
For Furnace repair in Farmington MI, like us on Facebook!
For Furnace repair in Novi MI, visit us on Google!
Read what your neighbors say about the Furnace repair or installation we performed near Farmington MI on Yelp!
To schedule your Furnace installation in Farmington MI, just email us!
Looking for Furnace repair service in Novi MI? - Check out our YouTube channel.
Looking for Furnace repair service in Novi MI? - Check out our YouTube channel.
 
Home   |   Email Us   |   Schedule Service   |   Get a Quote   |   Maintenance   |   Guarantees   |   Employment   |   Tax Credits   |   Search Site
Home   |   Email Us   |   Schedule Service
Get a Quote   |   Maintenance   |   Guarantees
Employment   |   Tax Credits   |   Search Site
Google Map of Hartford & Ratliff Co., Inc.
Click to view full map