BURNER

A device, as in a furnace, stove, or gas lamp, that is lighted to produce a flame.

COMPRESSORS

A pump or other machine that increases the pressure of a gas.

CAPACITORS

An electric circuit element used to store charge temporarily, consisting in general of two metallic plates separated and insulated from each other by a dielectric. Also called condenser.

HUMIDIFIERS

A device for increasing the humidity in a room, greenhouse, or other enclosure.

THERMOSTATS

A device, as in a home heating system, a refrigerator, or an air conditioner, that automatically responds to temperature changes and activates switches controlling the equipment.