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Elena Chrimat

Tempe, AZ, United States

Scott Partlo

Stockbridge, MI, United States

Chaz J. Steffen

Millheim, PA, United States

Brian Cizmar

Monterey Park, CA, United States

Charles Allen

Seattle, WA, United States

Robert Cowell

New York, NY, United States

Charles Buell

Seattle, WA, United States

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Wenatchee, WA, United States

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Yorktown Heights, NY, United States

Andy Piercefield

Tucson, AZ, United States

Paigh Bumgarner

Charlotte, NC, United States

Blake Reid

Kamuela, HI, United States

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Hammond, LA, United States

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West Wareham, MA, United States


Seattle, WA, United States

David Potter

West Stockbridge, MA, United States

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Jacksonville, FL, United States

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Severna Park, MD, United States

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Los Angeles, CA, United States

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Skokie, IL, United States

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Boise, ID, United States

Forum Discussions

Speed Tips For Duct Airtightness Testing?

Started by Brendan Reid in General Forum. Last reply by David Butler 1 hour ago. 1 Reply

What made this chimney fall down?

Started by Eric Kjelshus in General Forum. Last reply by Eric Kjelshus on Tuesday. 7 Replies

How would you insulate this roof?

Started by David Butler in General Forum. Last reply by Dave Taylor Nov 11. 61 Replies

Manual J (SD) for custom, luxury homes

Started by Dav Camras in HVAC. Last reply by Dav Camras Nov 10. 3 Replies

Quantitative methods for residential zoning

Started by Brett in HVAC. Last reply by David Butler Nov 9. 1 Reply

Latest Activity

David Butler joined Chris Laumer-Giddens's group

Energy Efficient Design

Energy efficiency starts at the drafting table...How architects and designers can help buildings…See More
34 minutes ago
David Butler joined James White's group

Building Simulations

Work collaboratively to find easier, more accurate and better ways to model, predict and verify a…See More
36 minutes ago
David Butler joined Mark Richardson's group

Renewable Energy

This group will focus on the issues associated with incorporating renewable energy sources like…See More
37 minutes ago
David Butler joined Kyle Brown's group

Wrightsoft - Manual J / Manual D

If you use Wrightsoft to calculate loads or design ducts, you likely have questions.  Get answers…See More
39 minutes ago
Profile IconDavid Butler and Don Fugler joined Allison A. Bailes III's group


HVAC design, Manuals J, S, T, & D, Duct leakage, Air flow, ENERGY STAR new home requirements,…See More
42 minutes ago
David Butler replied to Brendan Reid's discussion Speed Tips For Duct Airtightness Testing?
"The Home Performance Forum archives include a number of discussions on various methods for sealing…"
1 hour ago
Brendan Reid posted a discussion

Speed Tips For Duct Airtightness Testing?

Anyone like to share their favorite ways to speed up duct airtightness ("Ductblaster") tests?I'm…See More
3 hours ago
Don Fugler added a discussion to the group HVAC

joining ducts

A question came up on exhaust duct connections. I have always considered screws necessary for…See More
4 hours ago


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