Match the following terms,
1. heat engine
2. heat pump
3. Boiler
4. Thermostat


•a machine that converts the internal energy of a fuel into mechanical energy.

•an appliance that extracts heat energy from one source and deposits it
elsewhere.

•an appliance that controls the maintenance temperature of a heating
system.

•a heating appliance that uses heat energy released from fossil fuels to warm water for use in radiant or
convection heating systems.