"Robert: It is easy to see that your experience with radiant barriers is limited to what you have read. It is obvious that you have NOT read between the lines. For every study you provide - I can provide its opposite. Further…"
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Craig Bird
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Craig Bird's Discussions
Sources for duct insulation savings
7 Replies
Does anyone have any sources for savings estimates for wrapping ducts?In particular - I am interested to know the performance difference between:1/2" fiberglass wrap with no backing2" fiberglass duct…Continue
Started this discussion. Last reply by John Nicholas Feb 15.
Insulating Rigid Ducts in attic space - best practices?
6 Replies
We run into a lot of uninsulated ducts in our hot Arizona attics. I would like to know other peoples best practices for insulating - products and retrofit techniques.I am well aware that it would be…Continue
Started this discussion. Last reply by Ed Minch Jun 22, 2012.
What is COSTCO doing?
31 Replies
Does anyone else just see a lawsuit when they watch this video?http://www.trustedhomeservices.com/eshield/video.aspContinue
Started this discussion. Last reply by Jerry Lahr Mar 1.
Insulating rooftop ducts with spray foam - retro - hot/dry climate
15 Replies
Here in Tucson, AZ we have a lot of ducts on the rooftop. This is because many older homes are flat roofs and only had swamp coolers when they were built. This leaves no other place but the roof to…Continue
Started this discussion. Last reply by Pat Dundon Jun 15, 2012.
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Robert H replied to Craig Bird's discussion What is COSTCO doing?"Jerry that is a lot of twisting of facts. Radiant barriers work on one of the 3 methods of heat transfer. It does nothing to stop convection or conduction. So it works during daylight hours when the sun is beating down on a roof.
Radiant…"
David Meiland replied to Craig Bird's discussion What is COSTCO doing?"I found this piece entertaining http://www.greenbuildingadvisor.com/blogs/dept/musings/insulating-paint-salesman-tripped-his-own-product"
Craig Bird replied to Craig Bird's discussion What is COSTCO doing?"Cold Climate Housing Research Center also has a pretty comprehensive study published in 2011. The study was to "determine if reflective insulation is effective in cold climate construction, CCHRC conducted a literature review of research on its…"
Craig Bird replied to Craig Bird's discussion What is COSTCO doing?"According to the U.S. Department of Energy’s Energy Efficiency and Renewable Energy Clearinghouse, “Two field tests, one in Minnesota and one in Canada, both found that a radiant barrier placed over R-19 attic floor insulation (which is…"
Jerry Lahr replied to Craig Bird's discussion What is COSTCO doing?"I'm sorry ya'll, but I have to weigh in on this one. It is a shame that you have had no competently guided first hand experience with radiant barriers. Properly used and installed the radiant barrier is the eighth wonder of the…"
John Nicholas replied to Craig Bird's discussion Sources for duct insulation savings"REM allows you to estimate the length of supply and return duct based on the size of the home and # of registers. I have never done so, but it also allows you to directly enter the length. On two new Energy Star Homes I measured the…"
Curt Kinder replied to Craig Bird's discussion Sources for duct insulation savings"Heat / cool load calculation software (Manual J) provides ability to run different scenarios for duct insulation levels and duct leakage into unconditioned spaces.
Be careful with two layers of insulation on ducts in humid spaces - could create…"
Norbert Muller replied to Craig Bird's discussion Sources for duct insulation savings"How does Rem handle the ductwork inside the walls? Can you tell the software how many feet of ducts you are insulating?"
Brennan Less replied to Craig Bird's discussion Sources for duct insulation savings"Here's an LBNL research report by Iain Walker, who tested 24 retrofitted duct systems in the Central Valley of CA. Retrofits increased delivery efficiency by 64-76%, and reduced HVAC system energy by 18%, on average. This is going…"
Craig Bird's discussion was featuredSources for duct insulation savings
Does anyone have any sources for savings estimates for wrapping ducts?In particular - I am interested to know the performance difference between:1/2" fiberglass wrap with no backing2" fiberglass duct wrap with FSK Facing - seams tapedThanksSee More
Craig Bird replied to Kari Riedel's discussion Any feedback on Advanced Energy Panels (window insulation panels)?"I for one, enjoy having a product representative chime in. No one has more facts about the product. Part of the fun of being a scientist is questioning those facts. I think Bob has done well presenting the product whether or not the disclosure was…"
Craig Bird replied to Kari Riedel's discussion Any feedback on Advanced Energy Panels (window insulation panels)?"As far as fairness, accuracy and completeness, please start with discussion of the role of the larger air gap between the panel and the window in your overall r-value claims. Thanks,
Craig"
Craig Bird replied to Kari Riedel's discussion Any feedback on Advanced Energy Panels (window insulation panels)?"Bob - I was referring to the air space between the window-Therm panel and the window. The testing seems to be done on the assembly including the larger air gap between the window and the panel. Air spaces can add an R-1 per inch, so the gap between…"
Craig Bird replied to Kari Riedel's discussion Any feedback on Advanced Energy Panels (window insulation panels)?"Wow, that's pretty bull-headed. It's pretty obvious he is using the frame from the licensee and a different material for the film. Is that not plausible?"
Bud Poll replied to Craig Bird's discussion Sources for duct insulation savings"Let me know how much REM applies for savings. I run all of my calculations myself for the level of work I perform so have developed methods for getting my predicted loss to match what the customers actual spend. I actually see very few ducts in…"
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Comment Wall (1 comment)
- At 6:55am on December 11, 2010,
Diane Chojnowski said… Hi Craig,
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
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