I've noticed my new furnace uses about the same electrical power to operate as my old furnace, even though the new furnace (44k) is 1/2 the BTU of he old one (88k). Both furnaces use 1/3HP 5amp blower motors, old furnace was on high speed, new furnace was on low. New furnace uses a 1.8amp shaded pole inducer motor and is considerably larger than my previous furnace inducer. I didn't get the amp rating on the old furnace inducer, but it was a standard 'c frame' motor, most are about 1amp. Condensing furnaces do tend to use much larger inducer motors overall.

I write this post because I've noticed the increased electrical consumption with lower temperatures. Electrical efficiency isn't mentioned in furnace specs, but it appears to contribute considerably to operation costs.

Views: 78

Attachments:

Reply to This

Replies to This Discussion

Have you looked into any of the ECM motors? I hear they consume less electricity. It would probably take a couple years to pay for itself in savings, but with a new furnace, it may be worth looking into.

http://www.youtube.com/watch?v=YjoY6hRSudk

This motor looks like a good bet.

ECM could be the way to go. At $250 it does have a long payback though. The use of a 1.8A Shaded Pole inducer motor seems wasteful, a PSC would use 1/2 the power to do the same job.

RSS

Home Energy Pros

Home Energy Pros was founded by the developers of Home Energy Saver Pro (sponsored by the U.S. Department of Energy,) and brought to you in partnership with Home Energy magazine.

Latest Activity

Tom White posted a video

Ducts in an Attic

http://www.drenergysaver.com | 1-888-225-6260 In episode 66 of the On the Job video series, Larry Janesky, owner and founder of Dr. Energy Saver, is back to ...
13 hours ago
Stacy Hunt posted events
18 hours ago
Rob Madden, Solar Home Broker posted blog posts
18 hours ago
Rob Madden, Solar Home Broker posted a photo
18 hours ago
Kerry Haglund posted a blog post

Efficient Windows Collaborative Releases Window Selection Tool Mobile App

The Efficient Windows Collaborative (EWC) has released a mobile app based on it web-based Window…See More
19 hours ago
Casey Gesell posted a video

Home Comfort Pays for Itself | Ideas Worth Sharing

http://www.myhomescience.com There are 88 million homes in the U.S. and Canada alone that burn twice as much fuel for heating and electricity for cooling tha...
22 hours ago
Profile IconRob Madden, Solar Home Broker, Alicia Hobbs, Rachel Scott and 2 more joined Home Energy Pros
23 hours ago
Don Fitchett posted a video

HVAC AC Compressors Training

This HVAC training sample is from the HVAC section of the Online Industrial Training Video Library (http://bin95.com/Industrial-Training-Videos/HVAC-Training...
23 hours ago

© 2014   Created by Lawrence Berkeley National Laboratory.

Badges  |  Report an Issue  |  Terms of Service