exhaust lights into house?

Hey guys..another thread lol.

Thinking of running my air cooled hoods gonna seperate exhaust
Two 1ks.

Wondering if u guys vent the lights or the grow itself into your house ? And if so..what's the temperature like ?

I was thinking of using my laundry room for an intake going through lights and back into the same room..would this change the areas overall temp by a lot or just a little? .

Right now I only have one window and can only fit one 6" pipe in it..so I'm thinking I could exhaust room outside and lights back into laundry room.. But will it be realllllly hot in summer ? I have central air also

Thanks

Using the same air to cool your lights in a small room will increase the temp in the room by a lot if your using 2 1k watt lights. You need to use fresh air to cool the lights and vent it somewhere else.

I exhausted one of my grows into my living room. It kept the house warm enough to prevent the furnace from kicking on.
I saved a lot of money on my heating bills by using the heat from my grow room to my advantage.

Cpappa27 said:

Using the same air to cool your lights in a small room will increase the temp in the room by a lot if your using 2 1k watt lights. You need to use fresh air to cool the lights and vent it somewhere else.

Click to expand...

Well the grow room is 80 and outside grow room ranges 65-70. I was thinking of adding a duct from my furnace there as its already there ran up stairs.. Would this help even it out ?

My temp with two lights is 82 ATM..I'm just trying to get it a little cooler before summer..will this help.. Exhausting seperate ly

I exhaust all my hot air to the bedroom above the grow room. The air has to travel across the upstairs, down the stairs, across the basement to get back to the grow room. If you exhaust indoors you want something similar where it has to travel and mix with the air in the rest of your house before it can find it's way back to the grow room. If the heat is useful, use it, just make sure you have a good filter and a plan to handle any humidity issue that may arise.

Your furnace can do a good job of mixing the air in your home and can help make a more poorly designed system work ok. If you do end up leaving the blower motor on your furnace on, I would check on the replacement cost of that blower motor, may want to get the cheap repair plan from the electric company.

nomofatum said:

I exhaust all my hot air to the bedroom above the grow room. The air has to travel across the upstairs, down the stairs, across the basement to get back to the grow room. If you exhaust indoors you want something similar where it has to travel and mix with the air in the rest of your house before it can find it's way back to the grow room. If the heat is useful, use it, just make sure you have a good filter and a plan to handle any humidity issue that may arise.

Click to expand...

Humidity in the house is 20-30 same with grow room..

This is the area I wanna make both holes..bottom left and top right.


Will exhausting these separately lower the temp in grow room

In My room (size of a walk in closet)I have flex ducting coming in the left side to my 1000w and out on the right side into the laundry room. My basement is wide open except for the stairs and i notice nothing in heat differences. I'm also in a region where the a.c. is on or the heat is on ...

Please keep the replies coming

dux said:

In My room (size of a walk in closet)I have flex ducting coming in the left side to my 1000w and out on the right side into the laundry room. My basement is wide open except for the stairs and i notice nothing in heat differences. I'm also in a region where the a.c. is on or the heat is on ...

Click to expand...

So my laundry room sits at 65-70 and I also have furnace and ac..outside the room .so if I take from that room and go through lights and back to that room will I notice much a difference ? How hots the air u got coming out..and is your exhaust seperate from lights.. Will this mess with my passive intake I wonder..the laundry room is about the side of the grow room..little bigger..with a hallway

If you are going to run in summer too, plan for it now, be ready to swap the system to vent outdoors when temps get too high to want to pump hot air into your house. At that point I would connect your light with intake and exhaust going outdoors, the room air would intake from the house and exhaust outdoors, but you want that system to run as slow as possible while maintaining your temp/RH. The reason to run as slow as possible is that you are pumping conditioned air out of the house, the more you pump out the more you have to condition, aka the faster you vent the more work your AC will have to do to cool the air that leaks into your home to replace the exhausted air.

cbuts05 said:

So my laundry room sits at 65-70 and I also have furnace and ac..outside the room .so if I take from that room and go through lights and back to that room will I notice much a difference ? How hots the air u got coming out..and is your exhaust seperate from lights.. Will this mess with my passive intake I wonder..the laundry room is about the side of the grow room..little bigger..with a hallway

Click to expand...

Does the laundry room have a cold air intake for the furnace/AC? If so and if that is running, you won't have a problem, you will have problems if the heat/ac doesn't kick on for a while. Something has to perform the mixing of air with the rest of the house otherwise you basically have a 1000w space heater running in the laundry room building up heat.

nomofatum said:

If you are going to run in summer too, plan for it now, be ready to swap the system to vent outdoors when temps get too high to want to pump hot air into your house. At that point I would connect your light with intake and exhaust going outdoors, the room air would intake from the house and exhaust outdoors, but you want that system to run as slow as possible while maintaining your temp/RH. The reason to run as slow as possible is that you are pumping conditioned air out of the house, the more you pump out the more you have to condition, aka the faster you vent the more work your AC will have to do to cool the air that leaks into your home to replace the exhausted air.

Click to expand...

I'm trying to plan for it now fosho..

But I can only fit one exhaust in window.. And its beside porch so I can't have wye with 2 6" cause it'll whistle like hell..the goal is to exhaust the lights seperate ly hoping for a lower then current 84 temp.

nomofatum said:

Does the laundry room have a cold air intake for the furnace/AC? If so and if that is running, you won't have a problem, you will have problems if the heat/ac doesn't kick on for a while. Something has to perform the mixing of air with the rest of the house otherwise you basically have a 1000w space heater running in the laundry room building up heat.

Click to expand...

The cold air intake is too far away.. There's ducting for a vent upstairs I was thinking of adding a vent there to blow cool air into laundry room in summer

Is one of those up top a cold intake ? Either way it would have to go across the joists n hang there..which would be fugly..I just need.to know first of all if this is gonna lower my temps

The lights don't need much air movement, can easily get away with running them on a 4" fan even the kind that use normal bladed fans in them. If that helps, maybe you could fit 4" ducts more easily and at lower speed? You can get an adapter to size your fixtures down to 4" at homedepot/lowes/... in the ducting section. Keep the bigger size if you can for the room exhaust, just in case, but if you are in less than 40 sqft a 4" 200+cfm fan should be enough anyway.

cbuts05 said:

Is one of those up top a cold intake ? Either way it would have to go across the joists n hang there..which would be fugly..I just need.to know first of all if this is gonna lower my temps

Click to expand...

I'm not a heat guy, so can't be sure, but I think those are the cold air returns for your upstairs rooms. Could be heat ducts or a combo of the two though. Follow them back to the furnace. Cold air return usually goes in the side/back and the heat/ac output goes out the top. You can also just feel them after the heat has been running for a while to confirm. If so you can just cut a hole in the return so it sucks air from that room.