what are ways to lower the temperature in a room?

So I have a 6 in fan blowing cool air over my 1000 watt hps n out a 4 in hole in the floor but my room temperature is staying at 90 degrees f. I blocked off a vent that brings heat into the room. I don't know what else to do.

so this is air cooled ? fan blowing through the light ? can suck air from hot room blow through light hot air out of room . that 4 inch exhaust needs to be 6 at least restricted

bryan oconner said:

so this is air cooled ? fan blowing through the light ? can suck air from hot room blow through light hot air out of room . that 4 inch exhaust needs to be 6 at least restricted

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The air coming through the light is coming through a fan attached to a small carbon filter on the floor so it's cooler air then the air higher up in the room but I don't have any other ways to get cooler air to the filter. I removed all the ceiling tiles so the hot air can just rise into the attic. The temps sitting at 86 now but eventually I need another light to flower which is just gonna increase the temperature.
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bryan oconner said:

so this is air cooled ? fan blowing through the light ? can suck air from hot room blow through light hot air out of room . that 4 inch exhaust needs to be 6 at least restricted

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Also are you saying the vent in the floor needs to be 6 inches wide?

your intake should be at least 1 1/2 to 2 time the surface area of the exhaust opening 4" opening A = π*r². A = 3.14*2². A = 3.14*4
A = 12.5 square inches. So a 4" hole has a surface area of 12.5 square inches so you intake should be 2* 12.5 = 25 square inches
a 6" opening has 28 1/4 square inches.
So if you have a 4" exhaust you need a passive intake of 6"
So if you have a 6" exhaust you need a passive intake of 8"

Fan's pull better than they push, I would move the fan outside the room, in fact I would move everything possible outside the room. Put the filter on the light and as high as you can get it with the intake as low as as possible, is it a vented hood, maybe when you get the new light get back a t5 for veg and use the one you have for flower. I have heat issues too, it's not good so figure it out ASAP. Let me know if I can help in any way, I got a lot of ideas lol.

How big is your grow area? 1000w of HID puts off a lot of heat.

Your only options are to exhaust the heat from the light faster and thus pull more fresh (cooler) air in or get an A/C. What is the temp of the air your pulling into the grow? As it will be a big factor in whether or not simply more air flow will solve your problem or if you need an A/C or smaller light.

Thanks everyone for the input. My grow space is roughly 10x 10 and intend to have two 1000 watt hps in that area in the end. I have grown with the same amount of light in a smaller space but I had to leave the door open for heat and humidity because I couldn't vent the air any other way. The temp of the air intake varies because the only place I could put the fan is close to a heating vent that I've blocked n it's dropped the temperature in the room from 90 degrees to 84 degrees. I'm using the biggest ducting I can use with my hood and outtake and fan. I might try switching the cycle of light too so the light will run when the heat turns on the least. They are still growin and healthy and I'd like to keep it that way.

You need to bring the carbon filter up where the warm air raises to and have cool air coming in at the bottom.
Where exactly are you exhausting to?

Also, , I think your 6" fan might be borderline small for that size room.

If you don't have an ac, your going to need it. Even with 1x600 you'll need an ac. With 2k lights, your gonna need a bigger than a 14k btu unit. If not, your flowers will be utter garbage. Fluffy garbage to be precise

DemonTrich said:

If you don't have an ac, your going to need it. Even with 1x600 you'll need an ac. With 2k lights, your gonna need a bigger than a 14k btu unit. If not, your flowers will be utter garbage. Fluffy garbage to be precise

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I agree with probably needing an AC, but a 14k? With active cooled hoods Id bet a small 5k unit would be fine. With open lights, yeah youd need a bigger unit.

Shugglet said:

I agree with probably needing an AC, but a 14k? With active cooled hoods Id bet a small 5k unit would be fine. With open lights, yeah youd need a bigger unit.

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NO! Less then 12K is like screwing your sister in that space!

12K minimum! No window rattlers as they will not work if the outside temps go below the inside temps during the winter (hell, in the winter. I run a dedicated thermostatically controlled exhaust fan that sucks in the cold air [filtered] from the outside. Saves on elec) !
Look on line for a good portable.....The best you can get are Tripp Lite server chillers.....NOT cheap but are really effective in cooling!
Other brands that are good in my book are AMANA (ebay has them for good prices) and I'm told LG is pretty good.....I would skip the others
The best can be minisplits in some situations. MORE expensive then portables but, they can move from place to place. They should be cleaned very well every 6 months according to my HAVAC man... He also says that the best is Mitsubishi - HANDS DOWN...

Well I have had success since yesterday in cooling the room by keeping the door open. I think more fresh cool air is needed, which can be achieved without an a.c. unit. I'm just going to cut a hole in the door n pull air that's around 60 degrees into the room.

Shugglet said:

I agree with probably needing an AC, but a 14k? With active cooled hoods Id bet a small 5k unit would be fine. With open lights, yeah youd need a bigger unit.

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I'd you think so.

DemonTrich said:

I'd you think so.

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The lights put out ~7k btu... If they are active cool hoods much of that heat will be removed from the grow, so reducing the need for AC...

I mean, is an AC unit really the only thing separating dense nugs from "fluffy garbage"?

@Dr. Who Minisplits are far more efficient than portables with greater cooling capacity. I think your AC guy meant "Fujitsu, hands down".

Shugglet said:

The lights put out ~7k btu... If they are active cool hoods much of that heat will be removed from the grow, so reducing the need for AC...

I mean, is an AC unit really the only thing separating dense nugs from "fluffy garbage"?

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So I added a hole in the door with a fan pulling in outside air n it dropped the temp from 86 to 70. I think I found a way to make it work without ac. The lights are in hood's and cooled so I think it'll be ok.

Shugglet said:

The lights put out ~7k btu... If they are active cool hoods much of that heat will be removed from the grow, so reducing the need for AC...

I mean, is an AC unit really the only thing separating dense nugs from "fluffy garbage"?

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Also I had a harvest under similar circumstances n left the door open bc the heat was so high n I yielded a lb a light so I doubt an a.c. unit is all that stands between you and a decent harvest.

You need to vent the heat from your light out of the room.

Otherwise you'll need an A/C that can remove as many BTUs your light produces.

In

Shugglet said:

The lights put out ~7k btu... If they are active cool hoods much of that heat will be removed from the grow, so reducing the need for AC...

I mean, is an AC unit really the only thing separating dense nugs from "fluffy garbage"?

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Post up at week 5 in flower when your buds are fluffy die2to the heat.