TURNKEY wrote:
I appreciate all the suggestions people have been giveng but I'm still looking at:
1-Is it better to pull air or push air?????
2-What temperature should a thermo switch be rated? And where should it be placed?Norcold 6.3 foot reefer.
I think pull or push makes little difference but CFM does. Having said that I believe a turbulent flow from a fan at the bottom cools better than a laminar air flow from natural venting or small fans at the top. A "fan in a can" produces more directional air than just a fan given the same CFM. I installed a bilge fan off a boat that I had (fan in a can) at the bottom of mine pushing up for that reason. It moves much more air than the small computer fans. I rarely use it because I also added a section of .020 FG sheet to the top to improve the natural venting of the air out the top vent as others have mentioned.