When using the Duct Blaster I have found it necessary to seal the combustion air grilles on the furnace door and flue on an 80% afue gas furnace in order to obtain accurate leakage results. Any comments?

Views: 175

Reply to This

Replies to This Discussion

Far from my expertise, but there should be no connection between the combustion side and the conditioned air side.  The only thing I can think of would be duct side leakage inside the cabinet then accessing the combustion side through the air intake.  Of course there is a possibility of a cracked air exchanger, but not something you would run into on every unit, I would hope.  I'll be watching to see what the pros have to say.

Bud

Damien, if you do that, your results are inaccurate and of course the HVAC guy has an issue to find & fix

The duct test doesn't test just the ducts, but the whole air handling apparatus. The only exception is the version where the air handler hasn't been installed & then they are only allowed 4% leakage per the 2009 codes. With that said many municipalities don't accept that test & we simply won't perform it

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

Hal Skinner replied to Kurt Shafer's discussion Where can I find the best radiant barrier to install under my roof?
"I just posted a statement and pictures of a home in Yuma AZ.  This is one I did 10 years…"
5 hours ago
Hal Skinner added a discussion to the group The RCC Classroom (Radiant Control Coatings)
6 hours ago
Tom Mallard replied to Kurt Shafer's discussion Where can I find the best radiant barrier to install under my roof?
"Anything done to raise the roofing off the sheathing works to reduce the high temperatures in the…"
7 hours ago
Michael Dunseith posted a photo

http://www.prattcenter.net/energy-champions-launch-party

Senator Kevin Parker poses with Pratt Center's Green Jobs Green New York Project Coordinator Elana…
14 hours ago
Michael Dunseith posted a status
14 hours ago
Rob Madden, Solar Home Broker posted a blog post

Phoenix 3rd Quarter Solar Resale Statistics Continue to Impress

Phoenix solar home sales were up during the third quarter of 2014, including the resale of homes…See More
yesterday
Everblue posted a status
"Green job alert! Energy Auditor in Baltimore, MD with Advanced Green Home Solutions. Check it out: http://bit.ly/1xhQuXO"
yesterday
Chris Clay replied to Isaiah Borel's discussion Blown Cellulose VS Blown Fiberglass in the Attic
"The Cold Climate Housing Research Center in Fairbanks, AK has alot of information about this…"
yesterday

© 2014   Created by Lawrence Berkeley National Laboratory.

Badges  |  Report an Issue  |  Terms of Service