Hi again,

    This is a great place to learn, thank you all that have answered my questions. Here is the next one. I just completed an audit and they only have a heater that is ducted because they are in a beach community. It was very leaky, but leaky compared to what??? I have read through my BPI and can't find some kind of multiplier for heater duct leakage

Judi

Views: 25

Replies to This Discussion

Duct leakage is leakage. I always apply the 6 cfm per 100 sqft energy star leakage standard for the ducts that I work with. The main difference in heating and cooling is in expected air flow of the two system types which vary.

21.7 times the OUTPUT btu= cfm for heat  Example: 100,000 btu furnace input   80,000 btu furnace output. 80% efficient.

21.7 X 80=1736 cfm supply for heat. You have to go outside BPI for these formula's. Try national comfort institute. The 80 comes from dropping the zero's  from 80,000 btu

thank you both, ahhh I forgot my HERS stuff. Yes, when I saw 21.7 I remembered HERS. See somtimes a little nudge is all we need. I guess I couldn't think of putting HERS and BPI together. Thanks much appreciated.

Judi

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

Colin Genge commented on Jim Gunshinan's blog post Energy Upgrade California—Up Close and Personal
"Pressurize the house to +25 Pa. Use smoke on the registers to identify leakage to outdoors then use…"
11 hours ago
Tim Reynolds replied to Alan Gindt's discussion Minneapolis Blower Door, Pressure Pan, and Bacharach CO 3 For Sale in the group Energy Auditing Equipment for Sale, Trade or to Purchase
"I was wondering if you would sell the pressure pan by itself and for how much? Thanks -Tim"
20 hours ago
Profile IconTim Reynolds and angela hines joined allen p tanner's group
Thumbnail

Energy Auditing Equipment for Sale, Trade or to Purchase

Discuss the pros and cons of the equipment you are interested in prior to purchase. Post equipment…See More
20 hours ago
Profile IconAllen Rathey, Kevin Love, Shannon Kahl and 1 more joined Home Energy Pros
20 hours ago
angela hines replied to Alan Gindt's discussion Minneapolis Blower Door, Pressure Pan, and Bacharach CO 3 For Sale in the group Energy Auditing Equipment for Sale, Trade or to Purchase
"What is the price for them together? What is the price just for the blower door set?"
yesterday
Alan Gindt replied to Alan Gindt's discussion Minneapolis Blower Door, Pressure Pan, and Bacharach CO 3 For Sale in the group Energy Auditing Equipment for Sale, Trade or to Purchase
"Yes"
yesterday
Anna Jursik's blog post was featured
yesterday
Everblue posted a status
"New Energy Auditor Jobs posted on our Massachusetts Job Board! Check them out: http://www.everblue.edu/hiring/job-board/massachusetts"
yesterday
Everblue posted events
yesterday
angela hines replied to Brooke Ingram's discussion 3 full sets of testing equipment available for sale! in the group Energy Auditing Equipment for Sale, Trade or to Purchase
"Hi is the Minneapolis blower door set still available?"
yesterday
angela hines replied to David Allen's discussion Like new! Great Deal! Minneapolis Blower Door system, Duct Blaster and Flir i-7 Infrared Camera for sale in the group Energy Auditing Equipment for Sale, Trade or to Purchase
"I am interested in the blower door and camera. Are they still available? If so i will buy. Please…"
yesterday
angela hines replied to Alan Gindt's discussion Minneapolis Blower Door, Pressure Pan, and Bacharach CO 3 For Sale in the group Energy Auditing Equipment for Sale, Trade or to Purchase
"Is this still for sale? I am interested and would want to buy."
yesterday

© 2014   Created by Lawrence Berkeley National Laboratory.

Badges  |  Report an Issue  |  Terms of Service