Combi Boiler Sealed Central Heating System Diagram

Everyone has a basic understanding of how a boiler works.

Combi boiler sealed central heating system diagram.

How a combi boiler system works. A combi boiler system combines central heating and hot water within the same compact unit. Whichever fuel the boiler is running on whether it s mains gas oil or lpg it enters a sealed combustion chamber inside the boiler and an electric ignition sets it alight. Combi boilers are available in gas electricity or oil depending on your fuel preference.

Hamworthy s upton condensing boilers and stratton mk2 wall hung boilers are suitable for installation in sealed heating systems only. Combi is short for combination. A modern condensing boiler maximises fuel efficiency by extracting heat from the latent waste flue gases by means of a condensing system. You should read this page in conjunction with the page on boilers and the page on heating controls.

So in places where space and hot water requirements are limited such as flats these can be very popular systems. The boilers fitted to older central heating systems i e. Sealed system using a combination boiler the majority of modern combination boilers often include a pump pressure gauge expansion relief valve filling loop and expansion vessel in with the boiler. For central heating 2.

System boilers are slowly becoming more common. Those over 10 years old have a simple heat exchange system which can be as low as 70 fuel efficient. The vented boiler regular boiler and combination boiler systems probably account for over 95 of water based central heating installations. Nb not to be confused with vented and unvented hot water tanks which are explained in our guide to hot water cylinders many homes in the uk still have an open vented heating system and in some cases they are the better option for your home.

This helps the installer create a sealed system when installing central heating. A secondary plate heat exchanger. Combi system this diagram illustrates how simple the heating system connected to a combi boiler is. A primary heat exchanger.

Combination boiler system diagram often referred to as a combi boiler this type of installation heats hot water as you need it without the need for a hot water storage tank. Central heating systems are either open vented or sealed systems. The diagrams below show three central heating types. However our purewell variheat cast iron condensing boiler can be.

Your combi boiler doubles as a central heating unit by adding a radiator. Central heating is a really convenient luxury to have. No external pump no tanks no external expansion vessel no motorised valves and in many cases item 6 is not needed either. Many manufacturers are now stipulating a sealed system to ensure system cleanliness and protect the boilers.

An automatic bypass valve is fitted inside most combi boilers by the manufacturer these days.