How to determine size requirements of the Panel Enclosure Cooler
1. Determine the watts of heat generated inside the enclosure.
[ Watts x 3.41 = (W) Btu/hr.]

2. Determine the area in square feetthat is exposed to the air, not including the top of the cabinet.
[ 2 x {Width} + 2 x {Depth} ] {Height} = (S) Square feet of cabinet

3. Determine the temperature difference between the desired internal temperature and the maximum expected external temperature. Now you can use the below chart to determine the Btu/hr./sq. ft., for this differential (B).

4. Determine the external heat load (H).
[(S) x (W) = (H) Btu/hr.]

5. Now take (W) and add (H) to get the total heat load or Btu/hr. refrigeration required to maintain desired temperature and choose the correct one using the chart.