Combi Boiler Sealed Central Heating System Diagram

For central heating 2.

Combi boiler sealed central heating system diagram.

So in places where space and hot water requirements are limited such as flats these can be very popular systems. A secondary plate heat exchanger. This helps the installer create a sealed system when installing central heating. No external pump no tanks no external expansion vessel no motorised valves and in many cases item 6 is not needed either.

Combi is short for combination. Central heating systems are either open vented or sealed systems. Central heating is a really convenient luxury to have. 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.

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. A modern condensing boiler maximises fuel efficiency by extracting heat from the latent waste flue gases by means of a condensing system. The combi boiler doesn t require a bulky storage cylinder and can easily fit into most kitchens or storage cupboards making them the ideal system for houses with limited space. They house two heat exchangers.

Your combi boiler doubles as a central heating unit by adding a radiator. Hamworthy s upton condensing boilers and stratton mk2 wall hung boilers are suitable for installation in sealed heating systems only. Combi system this diagram illustrates how simple the heating system connected to a combi boiler is. You should read this page in conjunction with the page on boilers and the page on heating controls.

Those over 10 years old have a simple heat exchange system which can be as low as 70 fuel efficient. 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. How a combi boiler system works. However our purewell variheat cast iron condensing boiler can be.

A primary heat exchanger. Combi boilers are available in gas electricity or oil depending on your fuel preference. The vented boiler regular boiler and combination boiler systems probably account for over 95 of water based central heating installations. An automatic bypass valve is fitted inside most combi boilers by the manufacturer these days.

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. The boilers fitted to older central heating systems i e. The diagrams below show three central heating types.

System boilers are slowly becoming more common.