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: 152

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

Brian Clavette added a discussion to the group Energy Auditing Equipment for Sale, Trade or to Purchase
Thumbnail

FLIR i-7 thermal imaging camera

Hi,I have a very lightly used FLIR 1-7 for sale.   i-7, serial # 60101-4267.  Full hard case and…See More
9 hours ago
Don Fitchett commented on Home Energy Magazine's blog post At Home with the Internet of Annoying Things
"True, for the smart consumer, the power savings should offset the additional power usage. For the…"
11 hours ago
Michael Dunseith posted an event

BPI Exams - All at Green Jobs Training Center

March 2, 2015 at 10am to March 31, 2015 at 2pm
Green Jobs Training Center is currently providing written and field exams for all of BPI…See More
11 hours ago
Michael Dunseith posted photos
12 hours ago
Dennis Heidner commented on Home Energy Magazine's blog post At Home with the Internet of Annoying Things
"Nice article. I am an electrical engineer, creating sensors for data collection and "possibly…"
12 hours ago
Chris Hunt commented on Home Energy Magazine's blog post At Home with the Internet of Annoying Things
"Hi Alan, You correctly identified a lot of the potential issues coming with the IOT or the…"
13 hours ago
Nicole Miller joined James Sayers's group
Thumbnail

Marketing Energy Efficiency

Sharing ideas, tools and examples of promoting energy efficiency to consumersSee More
15 hours ago
Avi Yashchin posted a video

CleanEdison: BPI Training

Avi Yashchin's former company, CleanEdison, provided education and training for those seeking clean jobs, These services included Exam Prep for Leadership in...
15 hours ago

© 2015   Created by Lawrence Berkeley National Laboratory.

Badges  |  Report an Issue  |  Terms of Service