Balancing a central heating system

Balancing a heating system

The importance of a balanced heating system.

Energy effiiantcy can be achieved  with the installation of a modern A band condencing boiler fitted with digital or machanical time control.   In addision to this balancing a central heating system will ensure that the heat genarated via the boiler will be evenly distributed through out your property.   Radiators need to be adjusted otherwise the closest fittted to the boiler will devour most of the heat.   Balancing a central Central heating system can be time consuming but evertheless this proess is important for a heating system to operate at its optimum.

Varying radiator tempertures of Balancing


The distribution of heat throughout an heating system.

The distribution of heat throughout an heating system is circulated by the pump,   a pump can either be fitted within the boiler casing or external to the boiler, depending on the heating system.  The only other divertion to the flow of water would be a diverter valve, similar to the pump it can be located within the boiler casing or in close proximity to a storage cylinder.  The purpose of this valve is to redirect the flow of water to fulfill what ever demand as been selected ie heating or hot water.  However a diverter valve is not a contributing factor when balancing a central heating system.  This can only be attheved with the installation of a spasicfic type of fitting that being a lockshield radiator valve.

heating system balancing


Balancing a heating system by using radiator valves

Radiator valves have been around for a very long time,  this usful device can isoalte slow down and also alter the temperture.  Most radiator installation conists of two varying valves on either side of the connecting pipework.  One of these being a lock sheild and the other a thermostatic radiator valve.  An abreaviation to this would be the term TRV,  this valve can easly be identified by the head that is numberd between 1 – 5 .  The adjustable head is designed to reduce or maximise the temperture of a room providing a user friendly option for temperture control.

A locksheild radiator valve is slightly smaller than a thermostatic radiator valve,  it is fitted with a small plastic adjustable head that is used for the purpose of isolate or balancing.  When installed they should not be adjusted after being set to the correct parameter.  Through the natural process of heat convection radiators closest to the boiler will devour most of the heat.  However by using stratgic adjustments to the lock shield valve will force heat that would usually remain isoaled to a certain part of the system into equall distrbution.

thermostatic radiator valve

Choosing a radiator valve combatable to the flow of your system.

On a balanced heating system the radiator valves have been installation to suite the flow of the system,  most radiater valves are designed to allow water to follow only in one direction.  This will sometimes be illatrasted on the valve to help an installer identifying the recommed direction of flow.  Proir to repairs its important to take a note of the seqence inwhich the valves are fitted left to right, ie lockshield or trv.

The confuseion of the two could lead to an imbalanced system thus  affecting certain radiators getting warm.   However  illustrated above is the image of a bi directional theromstatic radiator valve,  this cost effective device can be purchased from most plumbers merchant.   It allows the flow of water in both directions, embossed into the metal body of the valve are two arrows pointing in seprate directions demantrating its diversitiy to allow a choice of flow.  There fore if you have an existing system which is in need of replacement valves, bi directional radiator valves are the easiest and least time consuming option.


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