well ill just say my outside air temp is the same as yours probably is just a guess!!!! HeHeHe This set up is good for the MH right now but as for the hps im in the process of making a cool tube.
1. 6" booster furnace fan $27.99
2. 6"x4" reducer $4.89
3. hurricane glass $6.00
4. foil tape $8.30
5. dryer duct $6.46
6. keeping your hps so cool you can touch it PRICELESS!!!!!! LOL
nemf 2000 Reviewed by nemf 2000 on . first grow!!!! This is my first go round with this so i thought i would start a little log!:) Day 12 for these little guys 4th day under 400w MH. Cabinet is 4'x4'x4' introducing outside air into cabinet with 6" furnace booster fan. With 120 cfm computer fan doing the exhaust work ( check out the temp ). The top temp ( in= room temp) the bottom temp(out = cabinet temp ). To me the temps seem ok but that dont meen nothing as like i said first go round :) Rating: 5