There are two types of hot water systems.
Forced hot water heating system.
Hot water radiator systems are very common in europe.
Because water retains heat it is used to store and distribute heat in home systems.
The pros of hot water heating.
When a furnace shuts off the warmth disappears and you re more likely to feel drafts.
This type of system has a boiler for a heat source and heats the water inside the boiler.
It is also the least efficient.
The heated water is sent up pipes throughout the house by either circulator pumps or zone valves.
In a gravity system the circulation of water is due primarily to thermal and density differences between hot and cold water.
Hydronic heating is efficient and comfortable because it uses water to transfer heat throughout the building and water can hold more heat than air.
Fins in the baseboard then disperse the heat throughout the house.
Boiler radiator systems can be fueled by natural gas liquid propane fuel oil or electricity.
As water heats it expands displacing the cooler and less dense cooler water throughout the system.
The gravity system and the hydronic or forced hot water type.
Forced hot water heating.
A gravity hot water heating system is the oldest and simplest system to heat homes.
Hot water heating might be less popular to modern builders than forced air heating but it will keep your home feeling cozier all winter long.
Hot water heating systems can be powered by gas oil or electricity.
The hot water releases its heat at the radiator and the cooled water returns to the boiler for more heating.