Too HOT!!

[d_spaniard]

Im am currentlly growing in a small cubbord like space. it has 3 brick walls and a door. thats it!i used to use strip lights to grow my plants with, but this year i wanted a better yield and height, so i have bought a 400w light. The rooms temperature rises to almost 40 Centigrade!

Is there a way to cool the room down without using much space and withought nocking a whole in anything???

 

[Inspector420]

I think you need to add a vent...Is all brick? What is it an old fireplace?