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: 177

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

Laura Langham posted an event
Thumbnail

Residential Home Energy Efficiency Workshop - Greensboro, NC at Kathleen Clay Edwards Library – 1420 Price Park Drive, Greensboro, N.C. 27410

March 3, 2015 from 6:30pm to 8pm
Free Home Energy Conservation Workshop: Greensboro – 3/5/15Register for the Greensboro workshop…See More
2 hours ago
EnergyLogic Academy posted an event
Thumbnail

RESNET Rater Training Phase II at Denver, CO

May 11, 2015 to May 14, 2015
Join us in Beautiful Denver, CO!The field portion of HERS Rater Training is 4 days of field…See More
2 hours ago
Jim Gunshinan replied to Jim Gunshinan's discussion When your shower is in your kitchen...
"With more and more builders in crowded, expensive-to-rent-in cities like New York creating…"
2 hours ago
Home Energy Magazine's blog post was featured
2 hours ago
Profile IconBilly Ray Griffin and Lee Blanchard joined Home Energy Pros
3 hours ago
Home Energy Magazine posted a discussion
3 hours ago
Sean Lintow Sr replied to Jim Gunshinan's discussion When your shower is in your kitchen...
"Cool, I can start cooking dinner, hop in and take a shower while making sure that…"
4 hours ago
Jim Gunshinan posted a discussion

When your shower is in your kitchen...

Interesting question by Leanne Maxwell, former colleague at Home Energy:"Aside from all of the…See More
5 hours ago

© 2015   Created by Lawrence Berkeley National Laboratory.

Badges  |  Report an Issue  |  Terms of Service