Evaporative Coolers | Comments |
---|---|
EVAPORATIVE COOLERS: Algae Control -- Use Physan 20. A78-495 -- How to Build One Cost of materials was less than $100, not including fan; instructions; refer to A75-584; general information on function and maintainance. A61-541+; A64-377+; A74-396+ | 0 |
EVAPORATIVE COOLERS: Used Throughout the U.s.a. The fan and pad cooling system is the most popular. A80-356 | 0 |
EVAPORATIVE COOLERS: Use of Copper Sulphate on the Wet Pad Use 2 ppm. in the water periodically, A78-403 | 0 |