Garbage bags can be pretty handy components of an HVAC contractor’s tool kit, research in 2003 at Lawrence Berkeley National Laboratory (LBNL) (see “Air Flow Measurements in the Bag,”HE Sept/Oct ‘02 p. 8).Toting around a laundry basket is also a good idea. Indeed, contractors can often diagnose HVAC system pressures more accurately by using these common household objects than they can using commercially available flow hoods.


We researched the use of garbage bags as a measurement tool for two main reasons. First, bag filling has the advantage that it gives a direct volumetric flow without relying on flow measurement techniques that only sample part of the flow or assume a degree of flow uniformity, as almost all of the other techniques do. Second, as a demonstration of high or low flows to homeowners—or builders and HVAC contractors—bag filling has a direct visual element that is
very appealing.


See: "Garbage Bags and Laundry Baskets" by Iain Walker, Home Energy, Nov/Dec, 2003

Views: 30

Replies to This Discussion

This photo is a bit hokey and contrived. They are in a shower. Why would there be a supply or return duct in the shower anyway? Perhaps they are doing something more kinky or just kidding around.

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

Robert Haverlock replied to Hal Skinner's discussion How much heat energy is lost through the floor of a house?
"I feel like I'm preaching to the choir! So here it goes. In recent years, Building America and…"
1 hour ago
Maria Lacey replied to Linda Wigington's discussion Low-cost electricity monitoring: Accuracy & Applications in the group 1000 Home Challenge
"Steve, Thank you for posting the description of your installation process and photos of the final…"
3 hours ago
Everblue's blog post was featured

RESNET Combustion Safety Deadline is Near

An important deadline is looming for existing HERS Raters. By January 1, 2015, all existing Raters…See More
3 hours ago
Sean Lintow Sr's blog post was featured
3 hours ago
Amanda Hatherly replied to Chad Mcaulife's discussion BPI QCI Cert.
"Hello, I am the Director of one of the WAP training centers (New Mexico EnergySmart Academy) in New…"
4 hours ago
Kelly replied to Chad Mcaulife's discussion BPI QCI Cert.
"Hi Chad, I got the QCI during the pilot, but the written test hasn't changed much. The quiz…"
6 hours ago
Hal Skinner posted a discussion

Any success getting landlords to energy upgrade a single family rental unit?

Any success getting landlords to energy upgrade a single family rental unit? Multi-family dwelling…See More
6 hours ago
Steve Waclo replied to Linda Wigington's discussion Low-cost electricity monitoring: Accuracy & Applications in the group 1000 Home Challenge
"Trying again:"
7 hours ago

© 2014   Created by Lawrence Berkeley National Laboratory.

Badges  |  Report an Issue  |  Terms of Service