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: 166

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

Videos

  • Add Videos
  • View All

Twitter

Latest Activity

Empower Efficiency added a discussion to the group Job Board
Thumbnail

Position Opening: Local Community Outreach Specialist, Energy Efficiency (San Carlos, CA)

Local Community Outreach Specialist, Energy Efficiency (San Carlos, CA) Job Title: Local Community…See More
yesterday
Amber Vignieri posted a blog post

Elevate Energy Mythbusters: Windows & Attics Edition

This blog post is guest written by former staff member Eric Keeley.Great enthusiasm for home energy…See More
yesterday
Glen Gallo replied to Diane Chojnowski's discussion Poll: What is you favorite or most important home performance diagnostic or measurement tool?
"I agree with Ted. If I could bring just one piece of equipment it would be the blower door. It has…"
yesterday
Glen Gallo replied to Shaun 's discussion Commercial duct testing
"If above the ceiling tiles the wall is a finished assembly and there is insulation on or under the…"
yesterday
Tom White's video was featured

Combustion Appliance Zone Testing (CAZ) Made Easy (March 24, 2016)

Combustion Appliance Zone Testing (CAZ) Made Easy (March 24, 2016) -Gauge Fundamentals -Adapting to the new BPI standard -RESNET testing requirements -NFPA testing requirements -Best practices for best results
yesterday
Profile IconLaura Capps and Bret Abrams joined Home Energy Pros
Thursday
Olivia Taylor posted a blog post

5 Key Reasons Why Rooftop Solar Is Popular In The US

The rapid switch from traditional electricity to clean, economical and renewable solar energy is…See More
Thursday
Adam Swain posted a blog post

Top 5 Tips For Hiring A Crawl Space Contractor

A homes crawl space is one of the few places most homeowners try to avoid at all cost, and for good…See More
Wednesday

© 2016   Created by Lawrence Berkeley National Laboratory.   Powered by

Badges  |  Report an Issue  |  Terms of Service