cooling 9 hoods?

[yamaha_1fan]

I have 9 Easy Cool 6 hoods from HTG. I wish they were a little bigger, and had a different socket style. When you put the socket assembly in, it takes up half of the 6 inch opening. That can be changed though by removing the socket from the assy and using some brackets to mount it.

The big question is the lights are mounted in 3 rows.

The original plan was to use these 2 6" openings seen at the top of the pic to feed the 3 sets of lights.



forgive my quick and nasty mock up from Paint. My plan was to run branch lines across the back wall made of 6" rigid ducting, then tee off at each light. But something tells me I wont be getting enough air with one fan after each set of lights (1 6" vortex per 3 lights)



So now I am leaning towards 1 6"opening for each set of lights (add another opening), with 2 6" fans per set of lights, 1 pushing, 1 pulling





Some more of the room





The ducting has to come through where those inlets are already placed. Just to the right of those is the concrete foundation and that wraps around the rest of the room. And going up is not an option as that is the main level of the house. and going down, well we are already in the basement

 

[Ray of Light]

What about 12inch hole trough the wall for all the rows? I've done smth like that. But my system turned out to be overkill.

 

[yamaha_1fan]

hmm, that may be an idea. The wall I am going though is a finished wall on the other side and I am going through the wall above the dropped ceiling so its not visible on the other side. I will have to take a looksie and see what I can do. I also know the studs are very close together in that area.

 

[Albert Hofmann]

I agree with Ray, a main intake and main exhaust with one large fan and dampers comtrolling airflow to each row will be the best setup. Here is a primative sketch from another thread



This could easily be modified to 9 hoods. The intake and exhaust can be either 12" round or 16x8 rectangle and is based on a 12" fan.

Here is the other thread:
http://www.icmag.com/ic/showthread.php?t=69811

 

[In Vino Veritas]

Ray of Light, again - sick ****ing work.

Damn, with vents that big have you guys tried using those thermostat controlled attic fans for an intake, or maybe even exhaust? They are about 50 bucks in the most expensive of places. A little large for my application.

Yamaha, you can use those holes if you use them as independent intakes, or exhausts. What is on the other side (opposite wall)?

 

[Ray of Light]

I dont have thermo controled vents... my AC takes care of that. Vents are on when lights are on + a few minutes more. That's it.

Hofmann: That is simmilar setup as I have. Just before the exaust i placed two fans in series (smaller than the intake fans and bigger than the row fans) to create more pressure for the chimney.

 

[yamaha_1fan]

The other side of the wall is a basement bathroom with a dropped ceiling.






The studs are 12" leaving me about 10" in between

I am thinking of running 10" ducting (cant go 12" due to studs) up to each set of lights, then reduce to 6". That way the curves, length of run will be minimal. Then use a 6" fan at the beginning and end of set of lights.

TRying to build something like Rays setup at this point may hard as I have so much in the room, my poly is up, I cant see the overhead joists to attach things too, etc.

Decisions, decisons, decisions

 

[yamaha_1fan]

Just got the lights set up. With the AC running and lights on, the room is actually getting cooler. Need to get a thermostat but I may not even need the lights cooled. Of course it would probably be much more efficient if I did that versus the AC running 12 hours straight.

 

[hardseed]

love your work

 

[scruffy]

Might want to try to find a Pocket Ref or a book that can tell you CFM ratings of different duct sizes. A 12" is not going to move twice as much air as a 6" exactly. All depends on the ambient temps too. Nice clean setup, sure it will work for you better than expected.

scruff