For a 10 ft by 5 ft greenhouse with a 4-inch thick cross-fluted cellulose
pad evaporative cooling system you will need:
0.2 fans that can remove 4480 cfm of air each
Your 4-inch thick cross-fluted cellulose pad will need to be:
5 ft in length
1 ft in height
with a total area of 5 ft2
The pump will need to have a capacity of 2.5 gpm
The reserve sump volume nessesary is 3.75 gallons