Deciding Between 120V and 240V Heat-Pump Water Heaters – GreenBuildingAdvisor
Product Guide If you can put off an emergency decision when it’s time for a new water heater, considering capacity, power requirements, timing, and cost will lead you to a smarter decision By Jon Harrod | March 14, 2025 Photo courtesy of energy.gov When heat-pump water heaters (HPWHs) first gained popularity in the mid-2010s, the […]
I’m confused about whether or not to make the interior drywall airtight, thus acting as an interior air barrier. Here’s our current setup: HardieBenjamin Obdyke Slicker MAX rainscreenTyvek commerical wrapOSB, taped seams2×4 stud wallrockwool insulationdrywall I’m in the N GA area, so we have hot & humid summers and can have relatively cold winters. I’m […]
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Every successful Quality Management System enforces the concept of collecting and analyzing data to carry out operations efficiently, reduce nonconformities, and continuously improve. Clause 9.1 of the ISO 9001 QMS Standard is titled “Monitoring, Measurement, Analysis and Evaluation”, which outlines how critical this step is to finding success and compliance. The primary use of collected […]
Long-time reader, first-time writer. Thanks in advance for your time, expertise, and consideration. INSULATION DESIGN AND APPLICATION QUESTIONIn Zone 4a, which insulation method is preferred for T&G cathedral ceiling?4″ vented polyiso (~22-24 LTTR)• 1st layer: 2″ Atlas ACFoam III• 2nd layer: 3.5″ Atlas ACFoam CrossVent (2″ polyiso, 1″ vent, 7/16″ OSB)• 2′ staggered seams per […]
Hey there GBA. I’m an architect and I have a difficult roof situation (on my own house) and could use some advice/reassurance on how to deal with it. This is an existing 1860’s Greek Revival home in Climate Zone 6 that needs a new roof and suffers from really bad ice damming. It has a […]