"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…"
"Read the manufacturers claims and installation steps closely The foil needs a dead space
"To achieve a thermal resistance of R-8, 2-inch-wide spacer strips of rFOIL™ reflective foil insulation arewrapped around the duct…"
"I don't think he needs to worry about the vent. I think he saw what appeared to be yellowing pipe and a possible burn on the pipe and was concerned.
CPVC has a higher temperature rating than ordinary PVC. Often around 180F under…"
"The wording from one of Luis's post on April 20th, seemed to imply that the heater was a boiler not simply a water heater. If the temp measured was using IR point&shoot measurement - my guess is the 180F reading was either…"
"This really looks like burn marks when someone replace copper fittings to the right of the vent. It also looks like they used CPVC for the first six inches before moving to ordinary PVC. That could also be why you see "yellow"…"
"If you decide to replace or change out the vent pipe, it might be quite interesting to save it and have it sectioned where the area appears to be discolored from heat. If it was indeed heat the discoloring is likely to be all the way…"
"For cedar plank siding, if you want to remove and reuse, use a punch to push the nails through (or if large nail heads, pull them. its slow.), but if the siding is coming off on its own and the cedar siding is old (50+…"
"Why do you feel the planks are too old? Are they falling off themselves? Cedar siding grays and can show signs of decay on the outside while still being able to protect the structure.
As for alternatives - what part of the country do…"
"If you have a microwave oven in the same approximate area - repeat some of the tests with the microwave (using covered microwave save pans) I think you see numbers that are in the same range.
I suspect you could see some of the…"
"Comment for Rob concerning window AC units.
Outside air and inside air don't mix in most of the window units. If you look at the window unit and the filter that they use on it... It's like a MERV 0 or maybe -1....…"
The Healthy Indoors group is focused on indoor air quality (IAQ), mold, moisture control, radon, lead, air duct cleaning & HVAC hygiene, and building performance/ building science-related topics that affect the healthiness of our indoor environments, like air leakage.See More
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