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

Dennis Heidner's Friends

  • Curt Kinder
  • Chris Hunt

Dennis Heidner's Groups

 

Dennis Heidner's Page

Latest Activity

Dennis Heidner commented on Sean McLoughlin's blog post Programming in-floor electric radiant heat, is it worth it?
"The key is that this is the bathroom.  Occupancy is not constant.  It is more likely used in the morning and late afternoon.  If the house is in a cooling dominated zone - the heat on all the time adds to the cooling load.  For…"
Apr 23
Dennis Heidner replied to Tom Barrett's discussion How Much Energy Do Building Energy Codes Really Save? Evidence from California
"Tom,  in the study  http://peec.stanford.edu/docs/modeling/research/Deconstructing%20the%20Rosenfeld%20Curve.pdf The authors try to explain the differences between US and California per capita consumption, due to population, building…"
Mar 21
Dennis Heidner replied to Tom Barrett's discussion How Much Energy Do Building Energy Codes Really Save? Evidence from California
"Tom,  in our area  (Seattle) use something like Roxul for the exterior insulation... stay away from the XPS/EPS "
Mar 12
Dennis Heidner commented on Home Energy Magazine's blog post At Home with the Internet of Annoying Things
"Nice article. I am an electrical engineer, creating sensors for data collection and "possibly internet of things";  I do believe many people, promoters and companies are going over board.  That came up multiple times at last…"
Mar 2
Dennis Heidner replied to Patrick Michaelyan's discussion Vinyl Siding with Integral Insulation
"The observation about rot is important.   I agree. One of my complaints with some of the proposed insulated vinyl sidings - is the suggest simply putting it over the top of the existing siding.   I believe BSC and one of the national…"
Feb 27
Dennis Heidner replied to Patrick Michaelyan's discussion Vinyl Siding with Integral Insulation
"If you are using Hardie on a building,   James Hardie recently released a note that says in the near future new installations using their product WILL require at least a 3/8 air gap for the drainage plane."
Feb 26
Dennis Heidner replied to Patrick Michaelyan's discussion Vinyl Siding with Integral Insulation
"Interesting, in that I had a "heated" discussion at the Seattle Home Show about a week ago with a distributor of a vinyl siding product that had insulation.  While I personally would avoid the product,  he did make a valid point…"
Feb 26
Dennis Heidner replied to Tom Barrett's discussion How Much Energy Do Building Energy Codes Really Save? Evidence from California
"Tom, "My issue is that American Architecture is dumbed down to think you can be net-zero and not collect thermal energy, that's storing heat in winter, cold in summer at the right time of day or night." Perhaps you need to visit the…"
Feb 21
Dennis Heidner replied to Tom Barrett's discussion How Much Energy Do Building Energy Codes Really Save? Evidence from California
"The energy that you can get from a wind turbine is proportional to the swept area.  If you can get ten times more energy from a small wind turbine by changes to the generator - then you could get ten times more energy from those massive wind…"
Feb 20
Dennis Heidner replied to Tom Barrett's discussion How Much Energy Do Building Energy Codes Really Save? Evidence from California
"Tom,  there is a significant efficiency loss when you look at the energy used with batteries on site by each windmill.  I'd fallen into that trap before and it just doesn't pan out.   In most cases you would be taking the AC…"
Feb 20
Dennis Heidner replied to Tom Barrett's discussion How Much Energy Do Building Energy Codes Really Save? Evidence from California
"http://www.lasvegassun.com/news/2009/apr/13/authority-opposes-recycling-homes/ If you do not have an already built infrastructure to handle the sewage, then certainly greywater use as you suggest may be efficient.  If you are part of a…"
Feb 19
Dennis Heidner replied to Tom Barrett's discussion How Much Energy Do Building Energy Codes Really Save? Evidence from California
"John, you and met after one of your presentations in Chicago last week. One of the very obvious errors - is to assume that houses built under title 24 with the codes and regulations remain code complaint and will perform as designed over time.…"
Feb 19
Dennis Heidner replied to Tom Barrett's discussion How Much Energy Do Building Energy Codes Really Save? Evidence from California
"There are also reports looking at the impact of grey water recycling and using it for the outdoor landscaping which show it may not always be the most efficient.   In Las Vegas  for example, the water that is returned to the sewers is…"
Feb 19
Dennis Heidner replied to Tom Barrett's discussion How Much Energy Do Building Energy Codes Really Save? Evidence from California
"Hand dish washing can actually be more energy intensive than the modern most efficient dishwashers.  There are conditions of course... but often had dish washing involves using far more than the 2 gallons total water that might be used in one…"
Feb 17
Dennis Heidner replied to Tom Barrett's discussion How Much Energy Do Building Energy Codes Really Save? Evidence from California
"One of the obvious mistakes in the Elsevier article is:  "And fourth, the five other states with the lowest per-capita growth in residential electricity use, also depicted in Fig. 2, are California’s western neighbors: Nevada,…"
Feb 14
Dennis Heidner replied to George Kopf's discussion Utility death spiral = higher taxes? Perhaps...
"Agreed,  that is in part why benchmarking of commercial buildings including apartments, multi-family residential buildings has been adopted in many of the larger cities... and over the next 20 - 30 years it may be pushed down to smaller…"
Jan 19

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 to add comments!

Join Home Energy Pros

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!

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


Thanks!
Diane, HEP Moderator

 
 
 

Home Energy Pros

Home Energy Pros was founded by the developers of Home Energy Saver Pro (sponsored by the U.S. Department of Energy,) and brought to you in partnership with Home Energy magazine.  Home Energy Pros is sponsored by the Better Buildings Residential Network.

Latest Activity

Profile IconJerrad Pierce, tracylee, Nevada Heating and 4 more joined Home Energy Pros
16 hours ago
Shawn Weeks posted a blog post
17 hours ago
Kirsten Richnavsky's discussion was featured

New BPI Standard for Conducting Energy Audits Published as an ANSI Standard!

The Standard Practice for Basic Analysis of Buildings defines the minimum criteria and specific…See More
18 hours ago
Daniel Beauchemin's photo was featured

Residential installation of a ThermoDrain TD342B

DWHR HERS Index Score Credit Calculation ProcedureUntil such time that DWHR system calculations…
19 hours ago
Tom White's 2 videos were featured
19 hours ago
Corbett Lunsford's video was featured

New Home FAIL: Infrared Secrets Revealed

Building forensics guru Corbett Lunsford can show you what's behind the walls of any house- or are you afraid to find out? Don't be! It's all generally fixab...
19 hours ago
Jose Macho's blog post was featured

Why Don't Homeowners Spend Money on Energy Saving Upgrades??? Blame "Cognitive Biases"

A great transcript from a recent NPR "Morning Edition" broadcast about a recent California survey…See More
19 hours ago
Elizabeth Guinn's discussion was featured

ERV in need of backflow preventer.

I installed an ERV on my last job with the intake and exhaust utilizing 6" round hard duct.  I have…See More
19 hours ago

© 2015   Created by Lawrence Berkeley National Laboratory.

Badges  |  Report an Issue  |  Terms of Service