Do you have a boiler in your home?
Boilers heat water, and provide either hot water or steam for heating.
Steam is distributed via pipes to steam radiators. Hot water then can be distributed via baseboard radiators, radiant floor systems, or with a coil.
Hot water boilers are often favored for their efficiency and ease of temperature control, while steam boilers may be chosen for specific applications where high temperatures or certain steam-based processes are required.