Comments on: Leaky Downlights Waste Home Energy

By: Manish

Manish — Sat, 20 Nov 2010 07:40:51 +0000

LedLights

By: Manish

Manish — Sat, 20 Nov 2010 07:39:39 +0000

Ya you are right Leaky Downlights Waste Home Energy.
I appreciate your post, thanks for sharing the post, i want to hear more about this in future.
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By: Jim Gunshinan

Jim Gunshinan — Fri, 26 Dec 2008 22:04:14 +0000

Hi John,

The crew made "boxes" out of foam board and sealed the can lights from the attic side by gluing the boxes on top of the light housing. Be careful if you seal them that the lights don't get too hot. We us CFLs in the down lights that don't get too hot. With regular, hot, incandescents, the thermal cutoff switch turned the lights out. It's a safety thing that I am grateful for, but it makes sealing/insulating the lights difficult.

Best of luck with yours.

By: John

John — Thu, 25 Dec 2008 15:03:59 +0000

I have the same problem with leaky down lights. How did you seal the leaks? I have air tight down lights installed so I'm assuming leaks must be coming from around the drywall/light fixture junction. Thanks.

By: Jim Gunshinan

Jim Gunshinan — Tue, 25 Sep 2007 19:50:49 +0000

Correction. Some misplaced decimal points. The results of my blower door test were given as 7.2 air changes per hour (ACH) at 50 Pascal test pressure before air sealing and 4 ACH at 50 Pascals after air sealing. These numbers should be 0.72 ACH natural (no artificial deprssurization) before and 0.4 ACH natural after. To get ACH natural you need to apply a correction factor to ACH at 50 Pascals. ASHRAE recommends 0.35 ACH natural infiltration or provided by mechanical means.