Listed below we explain exactly how heat only boilers work, how they differ from various other systems as well as how to determine if a heat only boiler is right for your home.
A heat only boiler, additionally known as a regular, conventional or open vent central heating boiler, is a system involving 2 storage tanks, a hot water cylinder and the central heating boiler itself.
Heat just boilers are commonly found in bigger homes as they can much better meet the need for hot water across multiple taps as well as showerheads.
How do heat only central heating boilers work?
Houses with a heat only boiler will also have a feed as well as an expansion tank to preserve a constant degree of water in the heating system.
Water is in some cases lost from the system via leaks or evaporation, which is why the feed, as well as expansion tank, will replace the water in the system to maintain a continuous level of pressure.
Heat only boilers work by heating water as well as distributing it throughout a house using a system with various controls, including motorised valves, pumps and tanks.
A cold water tank stored in the loft will take water from the mains as well as feed it right into a hot water cylinder.
The central heating boiler will then heat the hot water cylinder, at which point the hot water is provided to taps as well as showerheads when required.
A pump will also flow heated water to radiators when the heating is turned on.
What is the difference between a heat only and system boiler?
Unlike system central heating boilers, heat only boilers preserve pressure utilizing a feed as well as an expansion tank, whereas system central heating boilers make use of a pressurised heating circuit topped up by mains water.
Heat only central heating boilers utilise a feed as well as an expansion storage tank to maintain water pressure whereas the expansion vessel is usually internal in a system boiler.
System central heating boilers need less space within the home than regular (heat only) central heating boilers and call for much less piping due to the need for tanks and various other components of an open vented system.
However, both systems store hot water for later use, instead of heating it as needed like combi central heating boilers.
What is the difference between a heat only and combi central heating boiler?
As pointed out above, combi central heating boilers heat water instantly on-demand as opposed to storing it for later use.
Combi central heating boilers do not need a cold water storage tank, an exterior hot water cylinder or a feed as well as an expansion tank, which means they take up a lot less room in a house.
This makes a combi central heating boiler a much better choice in properties where storage space is limited.
The advantage of a heat only central heating boiler is that it can supply water to multiple taps and showerheads much more easily than a combi boiler.
The hot water storage tank can keep big quantities of hot water as well as supply it instantly, making it the ideal choice for bigger homes with larger hot water demand.
What size heat only central heating boiler do I require?
The size of the regular (heat only) boiler you will require will certainly depend upon the size of the home as well as its degree of insulation.
You need to always talk with a boiler specialist like the Gas Assist customer service team on 01202 138758 prior to purchasing a new central heating boiler.
