Can anyone comment on the common types of heating and cooling systems installed in their region in high performance homes? More and more, I see designers and builders turning away from forced air…Continue
"Duct surface area clearly gives the more precise assessment of the quality of the installed duct system. But that precision is only precise in appearance, due to the difficulties of getting the correct surface area number. This is similar to blower…"
"In case this is useful for anyone, I have calculated the 2010 carbon emissions per unit of delivered electricity (lbs./kWh) for each state in the U.S. (based on eGRID data). The map below of the US highlights states where a best-in-class…"
"Thanks Bud. I just feel the need to point out any such issues, because we as a field need to be inclusive of women, both as home performance professionals and as homeowners (and elsewhere). I understand that it was not your intention, I'm…"
"I would love to see such matters discussed on this forum without broadly characterizing women as weak and irrational.
As for the other benefit of air sealing, it is certainly something that home/pest inspectors regularly recommend to limit pest…"
"I recently was working on a project, dominated by men, in which one woman was a contributor. Now, I'm not privy to all the details, but at some point, I noticed that the email string no longer included her. I brought this up casually by email,…"
"William, maybe I miscommunicated. In my personal experience (largely in the Bay Area PH projects), as well as from my observations from the larger PH community of homes (presentations on the topic by Katrin and W. Feist), the most common kitchen…"
As an LBNL building scientist who studies deep retrofits, I can confidently tell you that (1) airtightness matters, even in Berkeley, and (2) that it is very unlikely to make a home uncomfortable (assuming you provide ventilation and…"
"Ken, can you send me a copy of the report (firstname.lastname@example.org)? I would love to review it. I'm not sure I can include the data points in my summary (as we're nearly finished writing the report), though I've already used what was provided…"
"I'm glad to see that folks are getting interested in this. Ron, great point about chronic low-level exposures. These are certainly of concern, and are on the radar of folks at LBNL. Also, Judy, GREAT point about localized exposure in basement…"
"Congratulations Linda! 20 projects is really great, and their energy performance is stellar. I assume that since you are sharing this, that the attached data are open for use by others? I've just finished aggregating DER performance across the…"
Linda Wigington distinguished between deep retrofits & deep energy reductions, thus expanding the range of strategies & tactics from which we might propose when engaging with people, the ones who choose.See More
"Ben Schoenbauer, Pat Huelman and others in Minnesota have tested the retrofitted performance of a number of these systems, including a variety of models. This report would be worth checking out. Good…"
"Here's an LBNL research report by Iain Walker, who tested 24 retrofitted duct systems in the Central Valley of CA. Retrofits increased delivery efficiency by 64-76%, and reduced HVAC system energy by 18%, on average. This is going…"
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