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: 150

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

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

Susan E. Buchan posted a status
"EEBA's Conference in St. Louis last week was a great success! Presentations at http://www.eeba.org/conference/2014-presentations."
14 hours ago
Jan Green replied to George Kopf's discussion Real Estate Professionals need our support - but how?
"It helps for companies to understand what the public wants and to educate them so that realtors are…"
14 hours ago
Hal Skinner replied to Hal Skinner's discussion An example of what an RCC can do with no R- insulation in the walls.
"Hi Bret and thans for the offer.   I sent you a friend request so I can send you a…"
14 hours ago
Kevin Jordan shared George Kopf's discussion on Facebook
14 hours ago
Kevin Jordan replied to George Kopf's discussion Real Estate Professionals need our support - but how?
"so who funds the greening of the inventory? would this be company by company?"
14 hours ago
Don Fitchett commented on Home Energy Magazine's blog post A Day in the Life of Learning
"This is a great addition to the July edition. Our PLC training uses the three areas too, but more…"
14 hours ago
Bret Curry replied to Hal Skinner's discussion An example of what an RCC can do with no R- insulation in the walls.
"Hal, Not sure if you serve the Little Rock market, or know of a company who does. If you know of…"
15 hours ago
Robert Cameron's discussion was featured

Air duct testing questions.

Many towns are now adopting the 2012 code about duct testing.  This is a great thing. However I…See More
15 hours ago

© 2014   Created by Lawrence Berkeley National Laboratory.

Badges  |  Report an Issue  |  Terms of Service