Hey thanks 907PokeSmot. I called it a shed but it's actually made of brick, i figure if i insulate it enough it should be ok and retain the heat during the dark period, although the idea with a little heater is a good one.

What do you think of making the dark period in the daytime so the lights are on in the night when its cooler?

Do you think i will need some detection foil stuff to hide the heat or if i insulate it well enough the heat shouldn't show?

Can someone post some pics of what i need (passive intake with filter and a 265cfm fan)

Sorry for all the questions, quite excited about my little growroom

Peace

TB
tripleblack Reviewed by tripleblack on . Help me set up...please guys :( I have a little shed outside measuring 4'x4' and 6'high. I plan on using a 400w ballast which can take both halide and sodium. I will properly insulate and lightproof first. I am just unsure on ventilation. I am presuming that because i am outside i will experience less heat (i'm in the UK!) but am aware that i will still need some fresh air passing through. I guess i am just unsure on how much heat a 400w sodium bulb produces and am really confused on fans and filters etc. Can i get a Rating: 5