"I've used the same approach when replacing furnaces and HVAC equipment. Seems crazy to set duct work onto concrete floors, or set an updraft furnace on a concrete floor with the return vent ducting set on the concrete floor feeding into…"
"Personally I would NOT use polyiso in this case. I've seen it age ungracefully in garages and you have weight ontop of it. I'd stick with something like an Dow XPS Formula 250 - which I believe has a 250 #/square foot. …"
"Good post for thermal safety.
One area missed is beyond just the temperature ranges -- is how the house responds to moisture. If the heating / cooling system is no longer available is the house able to maintain the relative humidity in a range…"
"For residential homes there are not a lot of sensing options out there that have tested and been certified.
There are several issues with kitchen cooking - and they apply to all stoves not just gas!
1) capture range of the hood. …"
"I agree with Jeff, it looks like you are cherry picking the data and your authors to validate your beliefs. Looking for data to the data as you've done without also looking for the geological events (volcanoes, etc... ) and…"
"He's a meteorologists that thinks like a meteorologist... if it's at 7000 ppm you have to look at what else just happened in the 100+ years before. For example a large asteroid that hits earth, blows dust into air and…"
"Joe Bastard is a meteorologist not a climate scientists. Day and night difference in how they look at the world around them. There observations are based on two very different views and philosophy's with Joe always…"
"You forgot to add, the obvious. Charcoal filters for recirculating the stoves filtered exhaust back into kitchen does nothing to remove the CO2, CO, or NOx that is produced. I may only remove some of the VOC's and all depends…"
"Pests are also a really good reason to seal duct work with either the approved mastic OR aluminum duct tape... not the sticky "un-Duct" tape that DIYers use... "un-Duct" can be tasty for some critters..."
"If you look closely ... can you see rat or mice teeth marks on foil? Some of the modern materials are gourmet meals for rodents. E.g. they really enjoy a snack on some PEX or the insulation from some automobile…"
"I believe one of the issues is how does one defend themselves against an HVAC contractor that insists it is okay. And the answer to that would have to be pull articles from ACCA or AHRI which say that reflective bubble wrap is worthless…"
"Correct, but when testing has been done on sealing ducts with wraps... (See the BTO and Build America website for reports... plenty of research done by ASHRAE and universities also) the seals are never really tight enough to prevent the…"
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