The phrase "radiates heat" is correct and usable in written English.
You can use it to describe any object that produces or emits heat. For example, "The sun radiates heat that warms the earth."
Just like the filament of a light bulb, the human body radiates heat, which can be detected as infrared radiation, or infrared light.
But artificial turf radiates heat.
Earth radiates heat into it all the time.
Engineer Robert Bean explains that your body absorbs or radiates heat from the surrounding surfaces.
At the far end of the room, a brick pizza oven radiates heat.
As the asteroid rotates, the dark surface absorbs sunlight and then radiates heat.
The heated internal surfaces then radiate heat to the indoor air, increasing indoor temperatures and internal cooling loads.
Black holes did have a temperature, they did radiate heat – later known as Hawking radiation – and they could therefore shrink with time.
But larger aerosol particles radiate heat in the form of long-wave radiation, thus increasing local temperatures.
I radiated heat, and my joints and muscles felt bruised.
For a black hole to have entropy, it must be hot and radiate heat.
