The system is based on gas fired catalytic heaters. These provide radiant heat which is collected by the gas pipeline within the unit. This system can be installed as a direct replacement of an existing WBH with the added benefit that only 1 suitably sized HotCat
would be required to replace 2 existing WBHs.
HotCat’s are made up of several zones each containing 2 catalytic heaters. Each zone can be controlled independently. Bruest state in their literature that the efficiency of their system is 70%. However, this figure does not include electricity consumption. Before the
gas supply is provided to each heater, the catalyst needs to be preheated to 232°C by an electrical preheating element. Once achieved, the electrical supply is disconnected and gas combusts to provide all of the required heat.