General Questions- Page 186 of 1412
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High-Quality Dehumidifiers
Hello all, I have had 4 santefe dehumidifiers. 2-70 and 2 98h. Some ducted some not. All of them have failed at the 3 or 4 year mark consistently. Does…
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Existing Barn Renovation – Adding Rigid Insulation to Interior – Moisture/Condensation Issue?
I have an existing barn in Vermont with exterior metal siding and R-19 fiberglass insulation with a plastic sheeting (4mm polyethylene) vapor barrier on inside of 2x6 structural framing. I…
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Contractor vs Martin Holladay –
As Martin and Dana and others have written on this site, it is not recommended to leave a gap between a brick wall and foam insulation, because mold.A waterproofer says…
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Frame to match 24 OC Roof Trusses?
I have ordered a set of roof trusses long ago enough that I expect they are being manufactured now, so I don't plan to ask for a redesign. The trusses…
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Best Way to Insulate a Garage
We'd like to air seal and insulate our garage walls. We are in zone 5. The current configuration is as shown, though I don't know if there is any sheathing…
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How to determine CFM of supply air room-by-room
I'm trying to get up to speed on air distribution systems. I've (somewhat hastily) read Allision's great series on duct design*, but it doesn't appear to mention how we determine…
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Backup Generator versus Battery Powerwall
We are building a 2300 SF "pretty good" house in Climate Zone 6 in northern Vermont using all-electric systems (heat pumps and in-wall electric heaters). Considering two alternates for backup…
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HELP! Air barrier trapped by ceiling and interior walls. How to fix? Impossible to install?
Hello,I am new to the Pacific Northwest and am an architect by trade, playing GC for my own home. I'm concerned that I created a huge issue due to a…
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Spray foam only the southern face of a roof?
I have a friend in climate zone 3 who is suggesting spray foaming only the south facing roof plane of their existing vented gable attic to try and slow heat…
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Is airflow in modulating ducted heatpump lower or higher than conventional furnace?
I'm trying to square two sentiments from GBA articles pasted below (I've seen similar sentiments expressed numerous times and they appear to somewhat contradict):From Jon Harrods piece (https://www.greenbuildingadvisor.com/article/191335)Compared to oil…