Hi,

After installing a Cree CR6 insert, does the canister still needs to be boxed out to keep insulation from covering the fixture?

Thanks

Paul

Views: 470

Reply to This

Replies to This Discussion

Hi Paul.

Certainly an issue with all cans that could use a good answer.  Unfortunately, we are most often left to our own thinking for guidance.  Here are my thoughts.

If it is possible to re-install a bulb with a higher wattage, then the higher wattage rules must remain in place along with the wattage warning.  If the modification is basically permanent, (no Edison socket), then the new bulb potential wattage can be considered.  Remember, I'm not the authority, these are just thoughts and here is the last sentence on one of Cree's warranty statements:

"Any changes or modifications not expressly approved by the party responsible for compliance could void the user’s authority to operate the equipment."  This was from a PDF under Vantage Controls.com from this search: http://www.google.com/#q=Cree+CR6+insert&hl=en&prmd=imvns&a...

Exactly what that means I couldn't say, but there are two authorities I look to, local AHJ, and UL.  I didn't see any reference to UL, but if your packaging has such that would be good.  As for the local AHJ, they rule and should always be contacted when looking for approval not specifically granted elsewhere.

As for boxing any can light, it is often discussed, but I have never seen a universally approved approach that would be accepted by all authorities.  Lacking specific UL approval or someone else's signature on the dotted line to take the responsibility off of your shoulders, I would not box, but replace with a new AT/IC can.

Bud

i bought severa of the Cree CR6 bulbs and have put soem in my own home as substitute bulbs in AT/IC fixtures.  They have been in for at elast 5 years now.    before we put these in the fixtures had halogenbulbs in them.  we sprayed the fixtures with open cell foam from the attic when we first installed them in 1996.  so far no problems with the halogens or the LED's.  not scientific, but factual.

when i told my supplier this, he said Cree does not reccomend this, and will not warantee bulbs installed this way.   i have since been using TenMat domes on recessed lights, then spraying foam on the domes.  we had one failure where the fixture had an incondescent bulb with the adjustable 'eyeball' trim ring.  in that case airlfow is restricted by the trim ring and the bulbs overheated.  the fixtures shut off.  i replaced the incandescents with LED screw in bulbs and all is well. 

in my case, we are specifying creating an airspace in the attic around any recessed fixture, then using spray foam to seal the outer surface of that space. 

Hi Pat, although my post above kind of says not to box, I also compare boxing to installing a can in a first floor ceiling or in a drop area over a kitchen sink.  In those cases, the can is still enclosed, but in a cavity that provides more area to dissipate the heat.  Since I have seen no restrictions for cans in a joist cavity, I would assume a similar generous space with a box should be acceptable.  At least this is the argument I use when talking to local code officials, if one is ok why not the other.

Bud

Sorry about all the typo's.  not my forte`  check with TenMat on this, but those covers are made for this application.  they are made of rock wool, so they will not burn and are good protection for the foam.  they are also easily installed. 

 

 

Typo's are certainly not an issue in these days.

The key to any cover is having had UL test that specific light with that cover or possibly having UL approve that cover for any and all lights, which I don't think they would do.  One cover I looked at had a list of several cans they had tested it with and it was thus approved for those and only those cans.  In any event, I haven't heard of this being an issue, but would not want to be the last one in line when they were looking to blame someone.

Bud

RSS

Photos

Loading…
  • Add Photos
  • View All

Latest Activity

Hamed Ghanbari replied to Brian's discussion Everything you need to become a energy auditor for sale in the group Energy Auditing Equipment for Sale, Trade or to Purchase
"Hello, I am interested to buy a Minneapolis Blower Door DG700. How much is your unit? Thanks. "
16 minutes ago
Hamed Ghanbari joined allen p tanner's group
Thumbnail

Energy Auditing Equipment for Sale, Trade or to Purchase

Discuss the pros and cons of the equipment you are interested in prior to purchase. Post equipment…See More
20 minutes ago
Profile IconHamed Ghanbari, Bob Eldredge and Thomas Joseph joined Home Energy Pros
21 minutes ago
Colin Genge updated an event
Thumbnail

Measuring HVAC Performance webinar at Online

February 23, 2016 from 11am to 12pm
If you install, service or test HVAC systems you will want be there for this special webinar.…See More
3 hours ago
Colin Genge updated an event
Thumbnail

Testing for IECC Code Compliance for duct and house leakage webinar at Online

February 16, 2016 from 11am to 12pm
The International Energy Conservation Code (IECC) is in use or adopted in 47 states, the District…See More
3 hours ago
Jan Green posted a status
"I'm honored to be selected to speak at the 2016 RESNET Conference right here in sunny Scottsdale 2/29-3/2/16 with SRP & others!"
5 hours ago
Joe Konopacki posted an event

Duct & Envelope Tightness (DET) Verifier at Temperature Equipment Corporation

February 26, 2016 from 8:30am to 4:30pm
The Duct & Envelope Tightness Certification (DET) was designed by the Midwest Home Performance…See More
6 hours ago
Diane Jackson liked Don Hynek's discussion Superinsulation retrofit is Complete!
7 hours ago

© 2016   Created by Lawrence Berkeley National Laboratory.   Powered by

Badges  |  Report an Issue  |  Terms of Service