Rigid evaporative cooler pad. Cardboard pads provide superior evap cooling by pulling air through cardboard channels for maximum water evaporation. Long lasting and durable, these pads can be easily removed for yearly cleaning. Use with a purge pump and increase the life of the pads.
Fits the following Mastercool models: HC43, HC44, HPC430, HPC440, CHC431, CHC432, CHC441, CHC442.
Fit perfectly! The replacement media I installed 4 years ago, from a separate vendor, did not have the groove cut into the bottom (as shown in the photo). The prior installation was difficult as a result.