Heat pump and method of operating heat pump to control power to boiler based on expected efficiency of heat pump

Heat pump and method for controlling operation of boiler based on temperature of fluid

Absorption refrigerator flame arrestor system

Absorption refrigeration protective controller

System for monitoring the performance of a gas absorption cooling unit and related method

Absorption chiller-heater

Venting arrangement for a vehicle refrigerator and related method

Absorption heat-transfer system

Absorption refrigerating machine