Trying to pick out fans?

[Dionysus_Tokes]

What size and cfm fan do any of you suggest to cool six (6) 1k watt air cooled fixtures.

2 smaller (3 each)?
1 large (6 lights)?

 

[StoneyK]

Depends on how you do your ducting...
We need more info.
How are the lights being run? In line? Does each light have its own duct? Thats gonna make a big difference. You could do it with one fan IF your ducting is correct that an where are you pulling air from what temps does it start at?
If you can pull it from someplace cool that helps a lot too.

 

[Granger2]

One large intake plenum-straight metal duct pipe, like 16 inch if you can get it, "T'd" off to each lamp. One large exhaust plenum-straight metal duct pipe with each lamp exhaust "T'd" to it. One large fan at end of exhaust plenum, pulling air thru the entire system. Lamps are not in series, so each lamp gets same cool outside air, rather than hot air from other lamps trying to cool lamps down the line. To do it with one fan, looks like you'd need a 12" monster with passive intake equalling about 16x16. Recommend filtering intake air with a pleated AC filter, medium duty, about 16x20. Get a common filter size conveniently available, like at grocery store. If there's room you could do 2 smaller systems with 3 lamps each. Probably easier to find duct parts. Don't skimp on intake nor size of plenums. Don't use flex pipe except where absolutely necessary. Note that you need to use pi x r squared when calculating this stuff. Seems like 2 - 8" fans are bigger than 1 - 12", but are smaller. Good luck. -granger