so the problem is winter obviously, already nighttime temperatures are only 5°C/41°F and expecting up, or should i say down
the setup is a 4x8 tent in a room which obviously draws in the air via this cold ass window from outside and exhausts though a hole in a door outside of the room.
inside the tent are 2x 600hps.
the lights are too hot to just have them switched on and recirculate in the room with the window closed,
and with the window open or tilted i dont know yet as its the first time in this weather and still then there is the other 12hr window without heat from the lamps...
now i really dont know how to help myself because quite honestly besides way costly heating the intaken air nothing comes to my mind except for maybe running
the two 600s one after the other and doing a 12hr 12hr autoflower setup and recirculate the air in the room to heat it.
(i detailed that idea here: https://www.icmag.com/ic/showthread.php?t=346866
please advise, out of ideas and it is getting colder by the day :(