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: 69

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

Latest Activity

Alfie Davis posted a photo

Quadtrant A1 Cleaning Checklist

Quadtrant A1 offers high-quality office cleaning and maintenance services for commercial and office…
3 hours ago
John White posted photos
6 hours ago
Jim Gunshinan liked Home Performance Coalition's blog post New Consortium for Energy Efficiency Report – High Stakes for Energy Efficiency
15 hours ago
Jim Gunshinan posted a blog post

Our First Year with Solar Panels, by Chris Stratton

We got solar panels installed on our home on 22 April 2016 - Earth Day, coincidentally. We now have…See More
15 hours ago
Jim Gunshinan liked Don Fugler's group Kitchen Ventilation
18 hours ago
Jim Gunshinan liked Don Fugler's group Kitchen Ventilation
18 hours ago
Franco Oyuela commented on John White's blog post Top 5 Ways to Conserve Energy and Save on Your Air Conditioner Bill
"Summertime, and your air conditioning unit at home will be asked to work super hard in this peak…"
19 hours ago
Diane Chojnowski's video was featured

The Business of Deep Energy Retrofits

Paul Eldrenkamp has more than 30 years experience in construction and specializes in energy efficiency. In this interview Paul discusses ways to standardize deep energy retrofits. He offers tips for executing projects and managing homeowner…
21 hours ago
Diane Chojnowski posted a video

The Business of Deep Energy Retrofits

Paul Eldrenkamp has more than 30 years experience in construction and specializes in energy efficiency. In this interview Paul discusses ways to standardize ...
21 hours ago
Julie Rosati is now a member of Home Energy Pros Forum
21 hours ago
Daniel Baur-McGuire replied to Jerry Needham's discussion Condensation on ceiling and walls of master bedroom
"Sounds like u opened the hornets nest! I would say a 2600 sq ft home shouldn't need more than…"
21 hours ago
Terry Hill posted an event

Passive House Institute US 2018 Conference at Boston

September 19, 2018 at 6pm to September 23, 2018 at 7pm
Annual conferenceSee More
22 hours ago
John White posted a blog post

Top 5 Ways to Conserve Energy and Save on Your Air Conditioner Bill

Air conditioners are the essential bastions of cool breezes when the mercury skyrockets and the hot…See More
yesterday
Jerry Needham replied to Jerry Needham's discussion Condensation on ceiling and walls of master bedroom
Saturday
Gabriel Rojas joined Don Fugler's group
Thumbnail

Kitchen Ventilation

In many homes, cooking is the largest indoor source of air pollutants. Exposures can be higher in…See More
Saturday
Gabriel Rojas joined Bob Krell's group
Thumbnail

Healthy Indoors (IAQ)

The Healthy Indoors group is focused on indoor air quality (IAQ), mold, moisture control, radon,…See More
Saturday
Leslie Jackson commented on David Byrnes's blog post What air conditioner filters work best?
"Hello, Leslie here, with Home Energy magazine. We just got an inquiry from a reader about a DIY air…"
Friday
Profile IconJoe Baumgardner and Steven Grevelis joined Home Energy Pros Forum
Friday
Eric Kjelshus replied to David Butler's discussion another house explodes, killing 2 in apparent natural gas accident
"I have seen dry clay soil let gas though 2-4 blocks away - when wet clay seals the pipe then water…"
Thursday
Kim Krause joined Diane Chojnowski's group
Thumbnail

Job Board

This group is for posting jobs related to all aspects of the home performance industry including…See More
Thursday

Photos

  • Add Photos
  • View All

© 2018   Created by Home Performance Coalition (HPC)   Powered by

Badges  |  Report an Issue  |  Terms of Service