GOT 4 VENTS AFF MY PAL SO PUT THEM ON THE SIDE OF MY YB LOFT DOWN NEAR THE FLOOR THEY GO APPROX 60% OF THE SIDE OF THE LOFT SO PLENTY MORE AIR WILL GET IN...I ALSO ACQUIRED A 4FT X 3FT METAL VENT 10MM HOLES SO THAT WILL GO ON THE OTHER SIDE OF THE LOFT BUT A BIT HIGHER UP AND WILL LET IN EVEN MORE FRESH AIR