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: 102

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

Videos

  • Add Videos
  • View All

Twitter

Latest Activity

Simon joined Diane Chojnowski's group
Thumbnail

Online Training

Online training coursesIf you provide ongoing online training for home performance or…See More
14 hours ago
Simon added a discussion to the group Energy Auditing Equipment for Sale, Trade or to Purchase
Thumbnail

Wanted - Blower and door frame kit for Minneapolis system

Hi everyone,I'm new to this line of work and have bought some equipment (Minneapolis blower door…See More
22 hours ago
Simon replied to Steve Mann's discussion TEC Blower Door Frame in the group Energy Auditing Equipment for Sale, Trade or to Purchase
"Hi, I'm interested, but could you send to UK?,I'd pay shipping of course. My email is :-…"
22 hours ago
Simon replied to Jeffrey Anthony's discussion Blower Door Equipment - 9 shrouds, 10 fans, 5 fan controllers in the group Energy Auditing Equipment for Sale, Trade or to Purchase
"Hi, if you able to sell sepereately, I'd be interested in a blower and a frame kit. My only…"
22 hours ago
Simon joined allen p tanner's group
Thumbnail

Energy Auditing Equipment for Sale, Trade or to Purchase

Discuss the pros and cons of the equipment you are interested in prior to purchase. Post equipment…See More
22 hours ago
Simon is now a member of Home Energy Pros
yesterday
Rob Madden, Solar Home Broker joined Leslie McDowell, BPI's group
Thumbnail

Building Performance Institute (BPI)

BPI is the nation's premier standards development, quality assurance and credentialing organization…See More
yesterday
Rob Madden, Solar Home Broker posted a discussion

Indoor Air Quality Monitors and Meters

I'm considering purchasing the AirAdvice for Homes indoor air quality monitor but it seems to have…See More
yesterday

© 2016   Created by Lawrence Berkeley National Laboratory.   Powered by

Badges  |  Report an Issue  |  Terms of Service