I was suggested an ink bird I was considering this, and getting a oil radiator to keep either the room tent is in warmer or inside the tent, with still having fresh air coming in from outside from window the battle has been keeping temps to an optimum range its had me on my toes from day one with outside being 7c and the air coming into the room the tent is in is pretty cold I try play with central heating to keep it stable in the room the tent is in because it can have quite fast effects of temps in the grow room but I cannot keep this up so I need an alternative to keep temps within range at night it can drop to about 17c now I need this higher? I would of thought so, Thanks again guys. more pics tonight.