I've been searching the web, including sites dedicated to energy efficiency in residential building, and I cannot find substantiated facts related to how much energy Recessed Can Lights consume.  I'd love to see comparisons of non-IC, IC, and ICAT cans regarding measurable facts on how their air leakage contributes to energy usage.  The only study I can find is from Penn State University that was done maybe 10 years ago, and it was short on details.  I'm not asking about electric consumption; only about energy consumption regarding air infiltration.  Can anyone help?

Tags: Recessed, air, can, infiltration, lights, recessed

Views: 149

Reply to This

Replies to This Discussion

I am trying to understand your question properly... are you asking what the potential "energy/heat loss" would be through the recessed cans cut-outs? Do you have the article link that you had mentioned?

Hi Caron,

Yes, here is the link to the article: http://arizonasolarwave.com/docs/recessed-lights-air-leakage-phrc.pdf.

Here's a relevant quote from the article that hints at the information I'm looking for: "As part of the inspection protocol, blower door testing, done in conjunction with infrared imaging, has revealed that out of all the possible air leakage sites in a house, can lights are responsible for the worst leakage."  But they don't give numbers, except for claiming that one can light can be responsible for transmitting up to 1/3 gallon of water per day into the attic, and between $5-30 per year in energy costs.  The study was done in 1992.  Surely we have more recent data with more numbers. 

When we do pressure pan testing with the Blower Door running, we also check can lights to show the home owner.  Invariably, we find most can lights to test at 35-50 pascals while the Blower Door is running at 50 pascals.  Quite a lot of air infiltration, but we're not running a study with publishable numbers.  Are there any updated data out there on recessed can lights?

Hi

 Good luck getting the lastest #s Let me add to your list of variables , beyond

talking about the thermal attributes of the various popular LED lights - something that should be considered is

the air infiltration and exfiltration though the ventilated fixtures designed for incandescent lamps & their heat output.

 Changing to appropriate, and contemporary SSL including Oleds means that these holes in folks ceilings, would

need to be re- thought as they may be wholey unnecessary for 21st century lighting schemes-

RSS

Forum Discussions

Home Energy Pros and #MeToo

Started by Mike Rogers in General Forum 12 hours ago. 0 Replies

How would you insulate this roof?

Started by David Butler in General Forum. Last reply by David Butler yesterday. 34 Replies

Psychrometric Chart Training

Started by John Krochmalny in Training. Last reply by Mahendra Shah on Friday. 1 Reply

Latest Activity

Blake Shurtz posted a discussion

Replacement for Energy Conservatory Flow-blaster

It's too bad that the flow-blaster is no longer being produced or technically supported. Does…See More
6 hours ago
Profile IconBrian Cizmar, Charles Allen, Charles Buell and 1 more joined Home Energy Pros Forum
9 hours ago
Mike Rogers posted a discussion

Home Energy Pros and #MeToo

If it doesn't seem obvious why a discussion of …See More
12 hours ago
David Butler replied to David Butler's discussion How would you insulate this roof?
"Sean Lintow proposed rails and clips (re: first comment in this discussion), but in the context of…"
yesterday
Brad Cook replied to David Butler's discussion How would you insulate this roof?
"I missed where the suggestion for rails came in. The plywood would not need any rails. 4+ inches is…"
yesterday
David Butler replied to David Butler's discussion How would you insulate this roof?
"I'm a little confused about the necessity and purpose of using support rails if working on…"
yesterday
David Butler replied to David Butler's discussion How would you insulate this roof?
"If you insulate master bedroom and family room from below, you definitely need more R-value than…"
yesterday
David Butler replied to David Butler's discussion How would you insulate this roof?
"Brad, I was only talking about using EPS between the ridges, if necessary, to conform to bolts.…"
yesterday

Photos

  • Add Photos
  • View All

© 2017   Created by Home Performance Coalition (HPC)   Powered by

Badges  |  Report an Issue  |  Terms of Service