canopy fan

horsefarm5 · 01/03/2009, 09:26 AM

I'm building a canopy and it will house 2- 175 watt se bulbs and 2 110 vho. My question is I have a 4 1/2 inch fan and was wondering if the fan should blow across the bulbs or use it to expel heat...I also have 2 computer fans, should I incorporate these into the design? Any help and ideas are appreciated
Thanks
Mike

gh0st · 01/03/2009, 10:52 AM

I always mount them blowing into the canopy as long as it isn't sealed up and airtight. Forcing air in will have less moisture going through the fans and should extend their lifespan.

It also is much more effective at lowering temps.

I tried my last fans blowing both in and out. Blowing in was three degrees cooler than out.

horsefarm5 · 01/03/2009, 12:52 PM

Thanks for the reply

nozleman · 01/03/2009, 03:28 PM

Yes I have built two canopies, they should blow in! And I would add at least two, for safety and incase one goes out!

carlisimo1969 · 01/05/2009, 12:40 PM

I put a 4" hole above each halide fixture and have fans blowing into the canopy, heat directly vents out the top and everything stays cool.

AZDesertRat · 01/05/2009, 12:44 PM

Mine is pretty much like carlisimos. Two 4" Vantec Stealth fans, one in each end blowing in with equal sized or larger holes in the canopy roof over the reflectors for heat to escape. This also takes advantage of convection, I get heat rising out even when the fans are off just by natural convection.

01/03/2009, 09:26 AM	#1
horsefarm5 Registered Member Join Date: Jul 2008 Location: New Jersey Posts: 176	canopy fan I'm building a canopy and it will house 2- 175 watt se bulbs and 2 110 vho. My question is I have a 4 1/2 inch fan and was wondering if the fan should blow across the bulbs or use it to expel heat...I also have 2 computer fans, should I incorporate these into the design? Any help and ideas are appreciated Thanks Mike

01/03/2009, 10:52 AM	#2
gh0st Registered Member Join Date: Sep 2004 Posts: 956	I always mount them blowing into the canopy as long as it isn't sealed up and airtight. Forcing air in will have less moisture going through the fans and should extend their lifespan. It also is much more effective at lowering temps. I tried my last fans blowing both in and out. Blowing in was three degrees cooler than out. __________________ I REFUSE to buy Named/LE/High End Corals for insane prices. I REFUSE to pay Per Polyp for micro "Frags." Further more, I REFUSE to sell in any similar fashion. This is a hobby, not the Stock Market. If you feel the same, change you're signature to something similar and spread the word! Long Live the Reef Revolution!

01/05/2009, 12:40 PM	#5
carlisimo1969 Registered Member Join Date: Jul 2004 Location: Green Bay Posts: 360	I put a 4" hole above each halide fixture and have fans blowing into the canopy, heat directly vents out the top and everything stays cool. __________________ Celebrating sunshine and you... Current Tank Info: 70g corner reef, 2-250 Pheonix 14k DE, 75g basement sump, 75g basement frag tank, Reeflo Hammerhead, OMSupersquirt, Aquaeuro 265recirc

01/03/2009, 12:52 PM	#3
horsefarm5 Registered Member Join Date: Jul 2008 Location: New Jersey Posts: 176	Thanks for the reply

01/03/2009, 03:28 PM	#4
nozleman Registered Member Join Date: Oct 2006 Location: Camarillo, ca Posts: 208	Yes I have built two canopies, they should blow in! And I would add at least two, for safety and incase one goes out!

01/05/2009, 12:44 PM	#6
AZDesertRat Moved On Join Date: Jan 2002 Location: NW Phoenix Posts: 16,621	Mine is pretty much like carlisimos. Two 4" Vantec Stealth fans, one in each end blowing in with equal sized or larger holes in the canopy roof over the reflectors for heat to escape. This also takes advantage of convection, I get heat rising out even when the fans are off just by natural convection.