General Forum (1,012)

Discussions Replies Latest Activity

Abandoning under-slab HVAC ductwork which fills with groundwater seasonally.

Our company is building a custom home in Wyoming on a site with high ground water. The client wanted to have supplemental forced-air heatin…

Started by Gregory Cisco

6 Sep 21
Reply by Ken Summers

Tonight is EFCA's Monthly Online Meeting for Contractors

If anyone is interested tonight at 5:30 PM PST is EFCA's once a month virtual meeting for contractors. Our monthly North Bay virtual chapte…

Started by Efficiency First California

0 Sep 6

Origin of guarded blower door testing

Does anyone know the origin of guarded blower door testing, and when the process was first developed? I know it goes back to the early to…

Started by Kim Tanner

10 Sep 6
Reply by Kim Tanner

BPI Now Accepting Applications for the 2018 Jon Siemen Memorial Scholarship

The Jon Siemen Memorial Scholarship was originally launched on September 12, 2016. The Building Performance Institute, Inc. awards this sch…

Started by Quinn Korzeniecki

0 Aug 29

Managing energy costs quotes

Hello, We're looking for quotes to use in our leaflet 'Managing your energy costs' and wondered if you could help. It's all about looking a…

Started by Joe Clark

0 Aug 11

When is it too windy to use blower door?

It has been a windy week out here in Phoenix, AZ this past week. I have a few tricks that I have used that works only sometimes. I use an e…

Started by Brandon Walton

17 Aug 10
Reply by Iain Walker

Performing home energy audits in Rhode Island

I'm considering performing residential energy audits in Rhode Island but have been very fusrated in finding any reliable info on how to app…

Started by Mark Thomas

5 Aug 3
Reply by tedkidd

Affordable Housing Funding

Where can we find funding to build affordable muti-housing, "is anyone willing to share their expertise for free?

Started by SUZETT MOFFITT

5 Jul 27
Reply by John Nicholas

Will you be in the Los Angeles area Tuesday, July 25, 2017?

If anyone is interested EFCA is having our in person Southern California home performance contractor meeting in Los Angeles, California Tue…

Started by Efficiency First California

0 Jul 12

Investigating 3257KWH monthly usage issue.

I know that this is not a forum for personal electrical questions, but I have a really strange situation going on. I took occupancy about t…

Started by Brent Shapiro

15 Jul 6
Reply by Mark Stout

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Forum Discussions

Psychrometric Chart Training

Started by John Krochmalny in Training 16 hours ago. 0 Replies

How would you insulate this roof?

Started by David Butler in General Forum. Last reply by David Butler on Monday. 2 Replies

Dirty solar panels

Started by Evan Mills in General Forum. Last reply by Stacie Bagnasco on Monday. 1 Reply

Latest Activity

David Butler replied to Brad Cook's discussion Too many Heat Pump Water Heaters in a basement?
"Hi Mike, it's good to get some feedback from the field, and thanks for confirming Gen 3 is now…"
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John Krochmalny posted a discussion

Psychrometric Chart Training

Looking through the various areas of this site, I didn't see too much information or training on…See More
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Core Heat And Other Concepts

  In some places the use of solar heated liquids from hot water solar panels are used to provide…See More
21 hours ago
Michael Duclos replied to Brad Cook's discussion Too many Heat Pump Water Heaters in a basement?
"I’ve been looking into Sanden for a multi-family PH near Laconia, NH, ASHRAE 99.6% temp is…"
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David Butler replied to Brad Cook's discussion Too many Heat Pump Water Heaters in a basement?
"theoretically, let's say you perfectly isolate the HPWH from a heat source. The HPWH's…"
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