anyone with expericence in growing indoor during winter??

how do u keep a sealed room cool during winter when its below freezing? i have a window ac but i was told its not a good idea to run cause the coil can freeze. i want to keep the room sealed so what should i do?? i really dont want to buy a portable ac unit.. should i just run a passive intake outake with scrubbers, filters and just run co2 during the night??

you cant without running ac or venting cold air in and the warm filtered air out. the only thing that will help is using alot of cfm to cool light with the cold outside air

Hey man

This has worked for me but i think only applies to closet or other small setups. Take two gallons of water, freeze em and switch them out hanging them in there. Sounds crazy but works

Peace

I forgot to add this should only be used to supplement at least a fan

Peace

thanks for info