Dennis Heidner
  • Kirkland, WA
  • United States
Share on Facebook Share

Dennis Heidner's Friends

  • Curt Kinder
  • Don Fugler
  • Chris Hunt
 

Dennis Heidner's Page

Latest Activity

Dennis Heidner replied to Chris Stratton's discussion Okay to use 1" polyiso as a insulation base for 50 gallon heat pump water heater?
"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…"
Tuesday
Dennis Heidner replied to Chris Stratton's discussion Okay to use 1" polyiso as a insulation base for 50 gallon heat pump water heater?
"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. …"
Monday
Dennis Heidner commented on Laurie Guevara-Stone's blog post How Many Hours-of-Safety Do Our Homes Have in Extreme Weather?
"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…"
Aug 8
Dennis Heidner replied to Luis Hernandez's discussion Proper range hood for natural gas 30" stove for an airtight home in the group Kitchen Ventilation
"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. …"
Aug 1
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…"
Jul 20
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

Profile Information

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

Comment Wall (1 comment)

You need to be a member of Home Energy Pros Forum to add comments!

Join Home Energy Pros Forum

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

Welcome to Home Energy Pros! Feel free to join the conversation in the Forum and Groups. And share your energy efficiency photos, videos and upcoming events. If you're blogging about home performance, this is the place for you!

Don't forget to upload your profile photo. And add your location on our Member Map!


Thanks!
Diane, HEP Moderator

 
 
 

Forum

Latest Activity

Robin Henry posted a discussion

Most current can light air sealing best practices?

I haven't had to airseal any can lights in several years. I have a client who has many can lights…See More
yesterday
Building Performance Association posted a blog post

August Policy & Advocacy Updates

By: Lizzie Bunnen, Government Affairs Director, AnnDyl Policy Group…See More
yesterday
Building Performance Association commented on Emily Ambrose's blog post 6 Building Conferences We’re Attending
"Great picks! Thanks for including us!"
yesterday
Building Performance Association liked Emily Ambrose's blog post 6 Building Conferences We’re Attending
yesterday
Diane Chojnowski's 2 videos were featured
yesterday
Brad Cook replied to Chris Stratton's discussion Okay to use 1" polyiso as a insulation base for 50 gallon heat pump water heater?
"Not all insulation is the same. For example, Dow's Super Tuf-R polyiso has a compression…"
Friday
David Butler replied to David Wentling's discussion ERV recommendations
"@Luke, since you work for a well-known ERV manufacturer, I'm curious if you have access to…"
Friday
Luke Langhals replied to David Wentling's discussion ERV recommendations
"Hello David -- Do you have an expected air tightness? What type of blower door test results are you…"
Friday

© 2019   Created by Building Performance Association   Powered by

Badges  |  Report an Issue  |  Terms of Service