I have the tent in an Out building that docent have shit for insulation , Studs sticking out and and pitched metal roof very Nipply.. I have the lights on or will be working to have lights on 6pm to 6am and run one of the radiant oil heaters on low 2 with a fan.. Vents are just cracked i lose about a 1/3 of my 4x8 tent space with heat and fan. the box i built stays warmer but harder for my FATOLDBROKDOWNASS to get around in it, Its only a 6ft tall but works wellIs your room in an outbuilding like a shed? What if anything do you do for heat? Just curious if I need a heater, I don't really wanna use one, fire hazard and all.