Recycling hot air

[sundays child]

It's been minus 10 celcius around here recently. The extraction fan in my grow room is pumping carbon filtered, 25 degree, 40%-50% rh air up the chimney. It occured to me that this is a waste of heat/energy which might be recycled in some useful way, but how?
Does everyone just pump this hot air outdoors or has someone come up with a
method for reusing it?

 

[kaljukajakas]

It's just as cold where I live and I recycle all my heat. Basically the cabinet is in my bedroom and it exhausts the hot filtered air into my living room, bathroom and kitchen through long runs of ventilation ducts.

 

[Haps]

I exhaust into my veg, keeps me house warm.
H

 

[SOGger]

recycling heat...

recycling heat...

I kind of stumbled into reusing the heat from the AC units in my grow and bloom rooms - they exhaust into an area that's just crawl space, and I discovered that by venting that air up into the house I was able to turn off any other heat in the house! Very humid air, tho...

If ya use the exhaust from your room directly, you're gonna have whatever stinky smell you're growing hit anyone who walks in the front door.

 

[swampdank]

If you can filter the smell, find a vent and shoot it up into the a/c system. I did this last night. I was having heat issues in the room, but it was chilly in the rest of the house. I didnt want to turn the heat on because it would make my temp rise in the growroom. I positioned my exhaust fan (sucking hot air off of my two 1k lamps) to blow up the a/c vent directly above the tent. Lo and behold, the hot air seeped through the rest of the vent in the house. Didnt have to run the heat last night at all. I dont know what the long term effects of this back pressure will be on a central air/heat unit. But I imagine I wouldnt be too bad if you have a blower that runs the unit.

It's food for thought. Cuz youre right, thats a waste of usable heat.

Get creative, just remember to filter that air cuz it will stink.

 

[wantaknow]

if you had a heat pump you would think you could dump it in the return vent

 

[sundays child]

Some good ideas here, thanks! I don't have a/c but I could run some ducting into adjoining rooms.
Wantaknow, I don't know what a heat pump is but I'm going to google it and find out.

 

[junior_grower]

I run the filtered air back into the ducting for the house.