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TRANSCRIPT
Energy Efficiency for Home Comfort: Finding Solutions (Part 1) Efficiency Audit Plus
Jeff Grazier JKG Consulting, Inc. February 17, 2010
Agenda
What is an Efficiency Audit “Plus”? Why would I want diagnostics? What categories of diagnostics are available? What do these diagnostics look at? Examples
What is an Efficiency Audit “Plus”?
Efficiency Audit + Understanding of which focused testing each house type or homeowner concern requires Performance diagnostics – measuring, collecting and analyzing data, perhaps taking additional measurements Strong analysis skills – listen to the data, few assumptions
Audit Flow
Customer Input
Visual Inspection and Basic Testing
Diagnostic Test
Diagnostic Test
Investigation of less obvious or more complex issues
Analysis Recommendation
Why Would I Want Diagnostics?
One or more contractors have already looked at an issue and have not been able to solve it for you You know your home has a complex problem that you want to resolve To find things you can’t see with a visual inspection, things that need to be measured To make an informed decision about what to fix and in what order
Specialized Tools
What categories of diagnostics are available?
Comfort Building Durability and Moisture Duct System Electric Loads Indoor Air Quality Performance
Pressure Mechanical System Thermal Imaging Utility Bill Analysis Water Consumption
What do these diagnostics look at? Air Conditioning Combustion Appliance Zone Domestic Hot Water Duct Leakage Duct Sizing and Flow Electricity
Furnace/Boiler/ Heat Pump/ Solar Induced Infiltration Infiltration Insulation Moisture/Humidity Mechanical Ventilation And more…
Examples
Building Durability and Moisture
Growth and siding failure
Bath fan vented into attic
Electric Audit Results Customers electricity use was twice average use
Disconnected: television, amplifier and sub woofer, computer (2) (speakers, printer and router)
508 watt
With the lights off and appliances on standby
960 watt
Electric Audit Results
On standby: furnace, kitchen appliances (refrigerator, oven, stove, dishwasher), alarm clocks (multiple), telephone answering system, smoke alarms, garage door opener
Disconnected: coffee maker, microwave, under counter light transformer, scented plug-ins, cable television tuner, DVD player (2), stereo (2), space heater, paper shredder, telephones (2), cell phone charger, television (4), VCR, fan, computer (monitor and speakers), humidifier, sprinkler system control, battery charger for power tools, electric razor charger, extra refrigerator and treadmill
46 watt
Rated vs. Installed Performance
Common problem with Air Conditioners Furnaces Insulation Ventilation Fans
How do you know if it works as rated?
Infiltration Assessment
Estimated Infiltration Distribution
20%
71%
3%6%
3% Return
6% Attic hatch
20% Pet door
71% Other
Induced Infiltration
Blower Door: 2,711 cfm50 Upper Level Pressure with respect to basement: 4.3 pa Measured Furnace Efficiency: 81% Induced Infiltration Loss: 19%
Loss increases as outdoor temperature decreases
Missing Insulation
How much difference does this make?
Thermal Boundary Misalignment
Connected to Outside Areas Expected to be Inside:
37%
Room #2 Floor Over Garage
41%
Room #1 Floor Over Garage
Uninsulated or Poorly Insulated Knee Walls
Are the systems working together well?
Distribution Heating Plant/ Cooling Plant
Heat Load/ Cooling Load
Jeff Grazier JKG Consulting, Inc. (970) 226-1359 [email protected]