Heating

Heating is making something warm. It could mean:
HVAC: Heating, ventilation and air-conditioning.
HVACR "R" stand for Refrigeration

Heating devices, or systems:
Block heater, or headbolt heater, an electric heater that heats the engine of a car to ease starting in cold weather
Boiler
Cathode heater, a coil or filament used to heat the cathode in a vacuum tube or cathode ray tube
Central heating, method of providing warmth from one point to multiple rooms or apartments of a building
Convector heater, a heater which operates by air convection currents circulating through the body of the appliance
Dielectric heating, the phenomenon in which radiowave or microwave electromagnetic radiation heats a dielectric material
District heating, a system for distributing heat generated in a centralized location for residential and commercial heating requirements
Fan heater, a heater that works by using a fan to pass air over a heating element
Feedwater heater, a power plant component used to pre-heat water delivered to the boiler
Fireplace, an architectural element consisting of a space designed to contain a fire for heating or cooking
Gas heater, a heater that burns natural gas or liquefied petroleum gas
Geothermal heat pump, a heat pump that uses the thermal mass of the Earth to regulate indoor temperatures
Geothermal heating a method of heating using geothermal heat
Heating pad, a pad used for warming of parts of the body
Hydronics, the use of water as the heat-transfer medium in heating and cooling systems
Induction heating, the process of heating a metal object by electromagnetic induction
Radiant heating, a heating system which heats a building through radiant heat rather than convection or forced-air heating
Radiator, a heat exchanger designed to transfer thermal energy from one medium to another for the purpose of cooling and heating
Radioisotope heater unit, small heaters that provide heat through radioactive decay
Salamander heater, a portable forced-air or convection heater, often kerosene-fueled, used in ventilated areas for worksite comfort
Solar furnace a structure used to harness the sun's rays to produce very high temperatures
Solar heating, the usage of solar energy to provide process, space or water heating
Storage heater, an electrical appliance which stores heat at a time when base load electricity is available at a low price
Water heating, the heating of water for residential, commercial or industrial use