Brochures Posted March 24th, 2014 by admin. Genie 20S Gas Heater Certikin GenieĀ 35-50S Gas Pool Heater Certikin Genie Dual Gas Heater Certikin COH Oil Heater Calorex Pro-Pac Heat Pump Thermalec 12THR Electric heater Thermalec 24THR Electric heater