The following stumper is presented in BPI's August Performance Matters e-Newsletter.

For this month's stumper, Ham Niles of Evergreen Home Performance provided this story about the home of a retired anesthesiologist and his wife in Maine.

"The couple lived in a home less than 20 years old. They had a tight house, solar hot water, under-floor heat, efficient windows, modern electric appliances for laundry, dishes and cooking, and a backup generator with a block heater and battery charger for when the power goes out, which it does frequently in this town on the coast of Maine.

The homeowners complained that there was high electrical usage that seemed out of proportion with their habits - as though they had a hot tub or AC running all the time.

We evaluated the house top-to-bottom, and found plenty of load - thirteen 90 watt can lights; several pumps for the under-floor heat; various phantom loads associated with printers, Tivos and a security system; but nothing that added up to the 12000 kWh the client was annually seeing. I recalled a story my boss told me about how to use the IR camera – and that led to directly solving the problem. What was it?"

Hint: Infrared of back-up generator (top left) and infrared of circuit breaker (top right).

Tags: BPI., Challenge, Chump, Matters, Performance, Stump, the

Views: 189

Replies to This Discussion

Its the block heater. 

I agree with Lain.  The block heater is on continuously keeping the block at a nice 121 degrees.  The circuit breaker assumably shows the active circuit to the block heater when the generator is on stand by.

RSS

Latest Activity

Shawna Henderson posted a discussion

Exterior Insulation for Deep Energy Retrofits

Heya! I've been lurking for a while on the various formats that came together for the HEP Forum.…See More
41 minutes ago
Dannie Jackson liked Allison A. Bailes III's group HVAC
23 hours ago
Dannie Jackson added a discussion to the group Energy Efficient Design
23 hours ago
Dannie Jackson liked Barry NewDelman's discussion Help your Clients save, THEN do what you do best
yesterday
Dannie Jackson replied to Barry NewDelman's discussion Whats the Consensus of this group Define "Energy Efficiency" in the group Energy Efficient Design
"Design wise I would say that energy efficiency is defined by the Btu / square foot.  This is…"
yesterday
Dannie Jackson joined Chris Laumer-Giddens's group
Thumbnail

Energy Efficient Design

Energy efficiency starts at the drafting table...How architects and designers can help buildings…See More
yesterday
Dannie Jackson liked Chris Laumer-Giddens's group Energy Efficient Design
yesterday
Dannie Jackson posted a blog post
yesterday

Photos

  • Add Photos
  • View All

© 2017   Created by Home Performance Coalition (HPC)   Powered by

Badges  |  Report an Issue  |  Terms of Service