I want to set up an outdoor outdoor air exchange, its winter. Any advice welcome.

i am currently using a spare bedroom to veg two mothers at the moment, OG #18 and Himalyin Gold under a 90 watt ufo. I have one window in the room and i want to vent the wicked stinky veg OG air out teh window and vent clean air in. i live in an apartment and dont pay for heat so wasting a little heat is not a huge concern. any thoughts??

oh fuck, forgot the most important variable lol, its winter here in maine, how do i prevent the new air from freezing my plants?

The cold air from outside will be way too harsh. Kinda like dropping a bucket of ice in your shorts.
If you're just exhausting the room, why not pull air from the rest of the house? I have my moms and veggers in a walkin closet and the fan draws plenty of air under the door. Even kept it cool in there during the summer with a 600mh burning 24hrs.
It's already winter in October? They rent Uhauls around there don't they?

BTW, I'm a farmer. It is boring when you're straight!
Fred

hahahaha dont know if im gettin hit on or helped out lol. yeah had that thought today at work.

Thats plenty of co2 for those girls form the rest of my house?

not winter yet....but that season seems to pull a heres Johny!!! up here.

Plenty. Actually higher concentrations indoors than out. Couple hundred more PPM.
Fred