Dennis Heidner
  • Kirkland, WA
  • United States
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Latest Activity

Dennis Heidner replied to Patrick Michaelyan's discussion Rigid Foam (Polyiso) as a Weather-Resistive Barrier
"I believe PolyISO can absorb moisture if it gets wet... and it would get heavy.  Make sure any punctures in the foil are sealed well. Have you looked at the DOE's Building America website for notes on projects like this.  I believe…"
Mar 18
Dennis Heidner replied to Dennis McCarthy's discussion Solid state lighting - saves lives- and it improves life .
"It is okay as long as you remember  both green and red are the colors that can not be seen by those with color blindness.  And that visual defect occurs more commonly in men.   Do you know if they are adding the color for the front…"
Feb 13
Dennis Heidner replied to James White's discussion Smartphone Infrared Thermal Imaging Camera
"Good point.   The low cost iPhone cameras are also opportunities for teaching moments.  It is easy to construct cases in which the user or the camera might produce "incorrect" results because the operator wasn't looking for…"
Feb 13
Dennis Heidner replied to James White's discussion Smartphone Infrared Thermal Imaging Camera
"The resolution and sensitivity of the kickstarter version -- makes it mostly a novelty.  Mu Optics is now nearly seven months behind their original estimated delivery schedule,  I'm they will finally deliver a year after their…"
Feb 10
Dennis Heidner replied to Dennis McCarthy's discussion The growing need for lighting auditors
"Probably closer to $70... I've been buying at about $35/tube in singles... The life of LED tubes are about twice as long.   Half the lumens... Instant start,  no hum, no flicker. Tubes are still on the watch list.  Prices have…"
Feb 10
Dennis Heidner replied to Dennis McCarthy's discussion The growing need for lighting auditors
"Sorry,  I couldn't resist ... (PIX below) the bulbs below were collected in my house over a several year period.  As the bulbs failed,  or took long enough to warm up that it no longer -- was safe.  You could walk in and out…"
Feb 9
Dennis Heidner replied to Dennis McCarthy's discussion The growing need for lighting auditors
"There may be less of a job opportunity in light auditing than suggested.  Interior designers are also competing in the field, as well as architectural lighting professionals - licensed architects.  Many architectural firms have been doing…"
Feb 9
Dennis Heidner replied to James White's discussion Smartphone Infrared Thermal Imaging Camera
"You can still modify standard cameras to operate in the near infrared range.  I have several.  They are not useful for producing the embarrassing images as suggested.  Those devices were night vision movie camera's  and they…"
Feb 9
Dennis Heidner commented on Brian Brainerd's blog post Is the Nest Learning Thermostat Disruptive Technology?
"Bob,  in defense of NEST,  the thermostat does have a lot of processing power in it... My guess is that they have allowed for a download of a firmware update to solve some of the problems.  And more importantly some of the algorithm…"
Jan 23
Dennis Heidner commented on Brian Brainerd's blog post Is the Nest Learning Thermostat Disruptive Technology?
"If the NEST thermostat was selling for $49 and no additional fees,  it would be disruptive.  But it isn't.  There have been numerous home automation systems with learning abilities for items such as thermostats -- available for…"
Jan 23
Dennis Heidner replied to Kari Sauder's discussion Easy Water Heater Venting in the group Hall of Shame
"The white stuff -- is probably combustion by products.  And I might be expected.  You would not normally see them on the white sch40 pipe.  Sometimes a gentle push on an inspector is more useful... you may see his work again... or he…"
Jan 18
Dennis Heidner replied to Chris Laumer-Giddens's discussion No More "Damn Architects!" - The Case for Integrated Design in the group Energy Efficient Design
"Sometimes the problems are not with the architects... but with the trades.  Sorry guys  (and I'm not an architect).  But I've seen wires, ducts, and piping placed not where it was recorded on the drawings... but where it was…"
Jan 16
Dennis Heidner joined Chris Laumer-Giddens's group
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Energy Efficient Design

Energy efficiency starts at the drafting table...How architects and designers can help buildings reach high-performance standards.See More
Jan 16
Dennis Heidner replied to Tom S's discussion Remote temperature sensor for wired thermostat
"Some thermostats also allow adding multiple sensors and then averaging them.  Any sensor you add must come from the maker of the existing thermostat.  You generally can not mix sensors. You may want to look at NEST,  I believe they…"
Jan 16
Dennis Heidner replied to Scott Willenbrock's discussion clothes dryer: vented or ventless? in the group 1000 Home Challenge
"I also  appreciate the report.  I've wondered for sometime how they might work on bigger loads.  When my wife and I have used them while travelling... it has always been for small loads while visiting friends or relatives…"
Jan 14
Dennis Heidner replied to Kari Sauder's discussion Easy Water Heater Venting in the group Hall of Shame
"If the pipe was galvanized... zinc will oxide with a "white rust"  not really deadly... it just doesn't last long... but coming apart at the seam... not good. The prior inspector should care... but he could also become quite…"
Jan 14

Profile Information

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

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At 12:25pm 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!

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Latest Activity

Jim Gunshinan commented on Jim Gunshinan's blog post Energy Upgrade California—Up Close and Personal
"I had a revelation while attending Bruce Manclark's session of duct leak testing at the Energy…"
12 hours ago
George J. Nesbitt commented on Jim Gunshinan's blog post Energy Upgrade California—Up Close and Personal
"Blower Door; the 2007 test was a depressurization test, and the 2014 a pressurization test, which…"
12 hours ago
George J. Nesbitt replied to Kaushal Bharath Raju's discussion Affordability & Deep Energy Upgrade/Passive House Retrofit in Berkeley, California.
"Plan, plan, plan, plan. The 1st step to is to understand the house, how it's built, the…"
12 hours ago
George J. Nesbitt posted an event

High Performance Windows - A Panel of Experts at Pyramid Alehouse`

April 26, 2014 from 3pm to 5pm
Join a lively panel discussion on high performance windows. We'll cover some basics, as well as…See More
13 hours ago
Kaushal Bharath Raju replied to Kaushal Bharath Raju's discussion Affordability & Deep Energy Upgrade/Passive House Retrofit in Berkeley, California.
"Hi David, Thanks for pointing out Martin Holiday's article. I do not wish to engage in the…"
13 hours ago
Profile IconAdam Penberthy, Scot Davidson and j jarvella joined Home Energy Pros
14 hours ago
David Eakin replied to Kaushal Bharath Raju's discussion Affordability & Deep Energy Upgrade/Passive House Retrofit in Berkeley, California.
"More food for thought on this subject - read this (fairly) recent blog by one of the most respected…"
19 hours ago
Curt Kinder commented on Christopher Morin's blog post 5 Things New Energy Efficiency HVAC Contractors Need to Know
"You left out air distribution...Without at least a passing glance at how much air moves through the…"
yesterday
David Eakin replied to Kaushal Bharath Raju's discussion Affordability & Deep Energy Upgrade/Passive House Retrofit in Berkeley, California.
"I mis-spoke - I was referring to the Midori House in Santa Cruz. Have an in-depth discussion with…"
yesterday
Kaushal Bharath Raju replied to Kaushal Bharath Raju's discussion Affordability & Deep Energy Upgrade/Passive House Retrofit in Berkeley, California.
"Hi David & Bud, $400/sqf > $300 sqf. The latter is the minimum cost of new construction in…"
yesterday
David Eakin replied to Kaushal Bharath Raju's discussion Affordability & Deep Energy Upgrade/Passive House Retrofit in Berkeley, California.
"Kaushal, There was a deep energy retrofit upgrade project (to Passive House standards) in San Jose…"
yesterday
Kim Tanner updated an event

Beyond Residential Testing at The Energy Conservatory

May 14, 2014 to May 16, 2014
The Energy Conservatory (TEC) is hosting a Beyond Residential Testing event. In addition we are…See More
yesterday

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