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: 111

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

Forum Discussions

Investigating 3257KWH monthly usage issue.

Started by Brent Shapiro in General Forum. Last reply by Jason Raddenbach 4 hours ago. 4 Replies

Earn 2 BPI CEUs by Blogging for BPI

Started by Quinn Korzeniecki in General Forum on Monday. 0 Replies

What made this chimney fall down?

Started by Eric Kjelshus in General Forum. Last reply by Eric Kjelshus Jun 15. 5 Replies

Studies on Home Energy Audit Energy Savings Potential?

Started by Julie Saporito in General Forum. Last reply by Danielle Sass Byrnett Jun 15. 5 Replies

Latest Activity

Rob Buchanan posted a discussion

Building envelope and mechanical interactive effects

Good afternoon everyone,I was reviewing some of the old BPI newsletters and noticed a…See More
2 hours ago
Jason Raddenbach replied to Brent Shapiro's discussion Investigating 3257KWH monthly usage issue.
"Brent, The fridge would be easy to isolate. You can borrow a Kill A Watt Meter from your local…"
4 hours ago
Mick Lane replied to Brent Shapiro's discussion Investigating 3257KWH monthly usage issue.
"My inclination would be to start with the water heater and the refrigerators.  You are looking…"
4 hours ago
Brennan Less replied to Brent Shapiro's discussion Investigating 3257KWH monthly usage issue.
"What about a hot water plumbing leak? I would expect on the order of 5,000 kWh per year with…"
5 hours ago

Photos

Loading…
  • Add Photos
  • View All

© 2017   Created by Lawrence Berkeley National Laboratory.   Powered by

Badges  |  Report an Issue  |  Terms of Service