Dennis Heidner
  • Kirkland, WA
  • United States
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Dennis Heidner's Friends

  • Curt Kinder
  • Don Fugler
  • Chris Hunt
 

Dennis Heidner's Page

Latest Activity

Dennis Heidner replied to Luis Hernandez's discussion Exterior green cladding
"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…"
11 hours ago
Dennis Heidner replied to Don Fugler's discussion Difficult retrofits in the group Kitchen Ventilation
"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…"
Monday
Dennis Heidner commented on Bob Krell's group Healthy Indoors (IAQ)
"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....…"
Apr 7
Dennis Heidner joined Bob Krell's group
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Healthy Indoors (IAQ)

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
Apr 7
Dennis Heidner replied to Don Fugler's discussion Depressurization/make-up air issues in the group Kitchen Ventilation
"Yup,  I've read prior posts.    And I know Don's posts are six months old.   While the one particular brand is no longer available,  there are actually quite a few on the market.   Its still on…"
Apr 5
Dennis Heidner replied to Don Fugler's discussion Depressurization/make-up air issues in the group Kitchen Ventilation
"They do meet UL standards, different UL standards,   but not for alarm systems that call fire departments. The CO detectors that are commonly used - are last ditch before people die alarms.   The save lives,  but do not…"
Apr 5
Dennis Heidner replied to Don Fugler's discussion Difficult retrofits in the group Kitchen Ventilation
"It's amazing to see how much junk are in some types of ducts.  I doubt anyone except the original owners would every think of checking and cleaning out the duct.  Many would not understand what its for - and worse someone else may see…"
Apr 5
Dennis Heidner replied to Don Fugler's discussion Depressurization/make-up air issues in the group Kitchen Ventilation
"Correct,  but if we're worried about depressurizing issues - having at least one very sensitive CO detector to monitor the issue - if make up air is not being supplied."
Apr 5
Dennis Heidner replied to Steve Nations's discussion high rise humidity
"If the unit has a RTU,  is it by any chance bring in fresh air from outside that has not been humidified?  In many of those high rise designs - they may be some kind of ERV that is supposed to capture and transfer some of the the humidity…"
Apr 3
Dennis Heidner replied to Don Fugler's discussion Recirculating hoods in the group Kitchen Ventilation
"CO isn't adsorbed by activated charcoal filters.  There are other compounds that result while cooking - even on electric stoves - and I don't know anyone that has done extensive testing of food groups and which emissions are…"
Apr 3
Dennis Heidner replied to Don Fugler's discussion Depressurization/make-up air issues in the group Kitchen Ventilation
"This is an old query that you had made six months ago,  but it is worth commenting on that second to the last paragraph. "The gradual disappearance of natural draft appliances (those with chimneys) and the availability of consumer carbon…"
Apr 3
Dennis Heidner replied to Don Fugler's discussion Difficult retrofits in the group Kitchen Ventilation
"It's possible that the location that you've setup the Dylos will not be actually capture an "accurate" particulate count.  Bear with me a moment.   Since you mentioned multiple different configurations (outside…"
Apr 2
Dennis Heidner replied to Tim Kendzia's discussion Cooling effect from solar panels
"Photocatalytic materials often have titanium oxide or other substances in them as part of the trigger to break down materials when hit with the UV in the sunlight.  Adding to paint - is generally an ineffective ensure the proper application of…"
Jan 2
Dennis Heidner replied to Tim Kendzia's discussion Cooling effect from solar panels
"Radiant barriers - especially paints and foils... have been tested many times by various labs and shown to be less than cost effective.  Then simply good old fashion insulation and air sealing. As for new special radiant materials.... indeed…"
Jan 2
Dennis Heidner replied to Tim Kendzia's discussion Cooling effect from solar panels
"I had noted, and show with graphs that there was some cooling because of the shading of panels.  But it was small compared to the reduction as a result of insulation - more insulation and not just code minimum. The original posters was from the…"
Jan 2
Dennis Heidner replied to Tim Kendzia's discussion Cooling effect from solar panels
"Generally when PV modules are added to a roof, the installers are supposed to ensure that AT LEAST fifteen years remain on the roofs life span (more likely they'd look for 20 years). It would be difficult to do an adequate job that a roofer…"
Jan 1

Profile Information

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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Forum Discussions

Exterior green cladding

Started by Luis Hernandez in General Forum. Last reply by Dennis Heidner 11 hours ago. 1 Reply

Mini-Crawl Spaces between City Row-Home's Conditioned Stories

Started by Robert Logston in General Forum. Last reply by Daniel Baur-McGuire 15 hours ago. 6 Replies

Faces & Places of HPC19

Started by Diane Chojnowski in General Forum Apr 5. 0 Replies

high rise humidity

Started by Steve Nations in HVAC. Last reply by Dennis Heidner Apr 3. 7 Replies

Follow the action at #HPC19

Started by Diane Chojnowski in General Forum Apr 2. 0 Replies

Unvented Roof Assembly

Started by Patrick Michaelyan in General Forum. Last reply by Wallacebastien Mar 30. 6 Replies

Technology and Customer Service

Started by Kelly Caplenas in General Forum. Last reply by Franco Oyuela Mar 25. 1 Reply

Latest Activity

Dennis Heidner replied to Luis Hernandez's discussion Exterior green cladding
"Why do you feel the planks are too old?  Are they falling off themselves?  Cedar siding…"
11 hours ago
Al Tibbs shared Don Fugler's discussion on Facebook
13 hours ago
Daniel Baur-McGuire replied to Robert Logston's discussion Mini-Crawl Spaces between City Row-Home's Conditioned Stories
"This sounds like a job for AeroBarrier and AeroSealing. Both products will seal the issues from the…"
15 hours ago
Daniel Baur-McGuire commented on Joe Hughes's blog post Christine Oliver, M.D. – Odors, Multiple Chemical Sensitivities and More an MD’s Perspective
"One of the best building science podcasts! I have learned so much from listendign to this…"
15 hours ago
Anna Stern is now a member of Home Energy Pros Forum
16 hours ago
Pearl Certification posted blog posts
17 hours ago
tedkidd commented on Diane Chojnowski's blog post How to spur home energy upgrades? Persuasive assessment reports
"I was a respondent. The reports I saw seemed tailored to the things utility programs care about…"
17 hours ago
tedkidd liked Diane Chojnowski's blog post How to spur home energy upgrades? Persuasive assessment reports
17 hours ago

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