Fans, Blowers, Carbon Filters, and Air Cooled Lights

[Wickedrebel]

Do you think if i ran a 8" inline fan or a 10" fan it would be good enough for my room? What size filter should i use?

[candyman2007]

Not sure about the dust issue. If I had to guess I would say you could hook the fan to the filter first and let it run for a few hours, it would pull all the loose dust out, then hook it to the light. Someone else that knows better may say other wise but once all the dust is gone there shouldn't be any new loose material.

As for the fan size I think a 6" 400+ cfm centrifugal fan would do fine. Don't forget you have to have an inlet for fresh air.

[candyman2007]

Monday at 3:30 the room was almost 96 outside temp 91. The value line fan came in and I installed yesterday. At first it didn't do much to cool the room but night came and it got nice and cool about 78. Today it only got to 84 inside the room outside temp 90. The new fan is working very nicely. I am going to hook the air intake to the AC this weekend. This should drop the temp another 6 degrees I hope.

[DizzzyLizzy]

Hey Candy, Sounds like you have that heat problem about solved. Is the new fan quiet? Hooking the A/C duct in should help cool things off (perhaps too much) if it does get too cool you may need to put your fan on a thermostat. Google Dayton 1UHH4 for a good line voltage thermostat. You can sometimes find them on ebay cheap.

Dizzzy

[candyman2007]

I looked up that Dayton. how does it wire up? does it have a plug for the fan or something. i am looking for the manual, but haven't found it yet.

[DizzzyLizzy]

It is wired into the power wire for the fan. The fan power wire will consist of two or possible three wires. A ground wire (optional) is usually green. A neutral wire - usually white. And a line wire - usually black. Cut the black wire and connect the lead from the plug to the pole (it will be marked) and the end going to the fan to the normally closed terminal (again they are well marked.) Leave the ground and neutral wires intact. As the temp rises to your set point, the thermostat will actuate, connecting the circuit and the fan will run. When the temp drops below the set point the T-stat will break the connection and the fan will stop.

It is called a line voltage thermostat because it breaks the 120v circuit versus a low valtage thermostat that is nomally found on your home A/C unit. This model of T-stat is rated at 15 amps so it will have no problem handling the fan. I use this unit as a T-stat as well as a limit switch. If my fan that cools the light fails and the temps get above 105, the T-stat actuates and shuts off the light so things don't cook or catch fire.

Dizzy

[candyman2007]

room hit 91 again today! i am going to have to hook up ac to the room via the 8" air inlet.

[Wickedrebel]

What up candyman? That 91 temp sounds scary i would run that AC as soon as you can. I am surprised to hear that your temps are so high even with the fan pulling hot air out. Is that Valuline pulling the air hard enough? Are your pulling air from the top of the room vs. the bottom? I am in the market for a fan at the moment are you satisfied with your purchase?

[candyman2007]

it says 91 on two temp monitors but the room feels way cooler. i like the valueline fan i don't think another would have done any better. the room is vented out the top but the fresh air also comes in from the top. i think the ac will help greatly.

[Wickedrebel]

Im sure the AC will bring things down a bit as well. How it the noise level of that vaueline? Is the fan itself loud or is it mostly the wind it is pulling. I will be using 6" duct. if the fan seems to be loud then i might get a 8" fan and fun it half speed with a duct 8 to 6 reducer.

[DizzzyLizzy]

To Gadgetman728 - I can't send PM's until I get enough posts. Here is my reply to your hypothetical question -

A 10' x 10' x 8' room = 800 Cubic feet. Depending on how fast you want to vent the room will determine how big a fan or fans you would want. For example, if you want to move all the air out of the room in 1 minute you would need an 800 CFM (Cubic Feet per Minute) fan. Personnaly I do not like to blow into a room but would rather suck the air out because if you pressurize a room you can't easily control the leaks and that leads to odor control issues. You can put fans under a mobile home quite easily. There is usually a crawl space for plumbing and electrical and I have never seen one set directly on the ground. They need ventilation underneath to control moisture and give access to the sewer and other utilities. The question I would have for you is where will you get the fresh air to replace what you suck out of the room, and where are you going plumb the exhaust?


Dizzy

[candyman2007]

Man o man, so i hooked this 8" air duct to the main connection point for all the other ducts with an inline booster fan, Wrong Idea!!! I sucked all the A/C out of the house! so i cut off the fans put a make shift air dampener over the out put of the inlet and the house cooled down in about an hour. Room is now staying between 77 and 84.

[Wickedrebel]

Originally Posted by candyman2007

Man o man, so i hooked this 8" air duct to the main connection point for all the other ducts with an inline booster fan, Wrong Idea!!! I sucked all the A/C out of the house! so i cut off the fans put a make shift air dampener over the out put of the inlet and the house cooled down in about an hour. Room is now staying between 77 and 84.

I bet you flipped out.. And i bet your grow room was a -30 haha.. nice to hear you got your temps in line. good job

[Wickedrebel]

Oh yeah, I want to thank you for all your help candyman +rep coming at you brother. I have decided to go with the 6" Valuline. I will let you know what i think when it comes in.

[candyman2007]

Originally Posted by Wickedrebel

I bet you flipped out.. And i bet your grow room was a -30 haha.. nice to hear you got your temps in line. good job

it got down to about 59 before i caught it. i almost rushed her outside to get some warmth.