In a heated manner.

(archaic) Heathen.

The state of being heathen. / From one religion's or creed's perspective, the rest of the world that does not follow that creed or religion.

A device that produces and radiates heat, typically to raise the temperature of a room or building. / A person who heats something, for example in metalworking. / (dated, slang) A gun.

A space heater that functions by itself being heated by steam passing through it.

plural of steam heater

A heater than employs induction heating

A heat-generating device used for frost-prevention in fruit orchards and vineyards.

plural of orchard heater

An electric heater that heats the engine of a car to ease starting in cold weather.