Dennis Heidner
  • Kirkland, WA
  • United States
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Latest Activity

Dennis Heidner replied to Jacob Corvidae's discussion The problems with gas stoves
"One of the VERY first basic science principles that are taught is that "CORRELATION IS NOT CAUSATION" https://towardsdatascience.com/why-correlation-does-not-imply-causation-5b99790df07e Konrad Danneburg would have one to remind you of…"
Saturday
Dennis Heidner replied to Jacob Corvidae's discussion The problems with gas stoves
"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…"
Jul 16
Dennis Heidner replied to Jacob Corvidae's discussion The problems with gas stoves
"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…"
Jul 13
Dennis Heidner replied to Jacob Corvidae's discussion The problems with gas stoves
"Okay,  here is one example of sea level rise and the loss of islands. https://www.bbc.com/news/world-europe-36255749 It's easy when you live inland to say that there isn't a problem.   But when you look at the more frequent…"
Jul 13
Dennis Heidner replied to Jacob Corvidae's discussion The problems with gas stoves
"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…"
Jul 13
Dennis Heidner replied to Jacob Corvidae's discussion The problems with gas stoves
"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…"
Jul 13
Dennis Heidner replied to Mark Furst's discussion Worst boiler ever?
"Wow,  a combination boiler and basement fireplace... great for toasting marshmellows and hotdogs while awaiting the fire department...."
May 23
Dennis Heidner replied to John S. Rodenhizer's discussion Using radiant barriers as duct insulation, Aka "Bubble wrap" What value do you assign for R-value?
"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..."
May 22
Dennis Heidner replied to John S. Rodenhizer's discussion Using radiant barriers as duct insulation, Aka "Bubble wrap" What value do you assign for R-value?
"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…"
May 22
Dennis Heidner replied to John S. Rodenhizer's discussion Using radiant barriers as duct insulation, Aka "Bubble wrap" What value do you assign for R-value?
"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…"
May 20
Dennis Heidner replied to John S. Rodenhizer's discussion Using radiant barriers as duct insulation, Aka "Bubble wrap" What value do you assign for R-value?
"Links for Build America and Building Science…"
May 20
Dennis Heidner replied to John S. Rodenhizer's discussion Using radiant barriers as duct insulation, Aka "Bubble wrap" What value do you assign for R-value?
"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…"
May 20
Dennis Heidner replied to John S. Rodenhizer's discussion Using radiant barriers as duct insulation, Aka "Bubble wrap" What value do you assign for R-value?
"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…"
May 19
Dennis Heidner replied to Luis Hernandez's discussion Water heater ventilation question
"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…"
May 8
Dennis Heidner replied to Luis Hernandez's discussion Water heater ventilation question
"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…"
Apr 30
Dennis Heidner replied to Luis Hernandez's discussion Water heater ventilation question
"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"…"
Apr 29

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Company
Rextorgroup
Professional Interests
Energy efficiency, building envelop, renewables, building modeling

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At 3:25pm on March 21, 2013, Diane Chojnowski said…

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