Boilers - Repairs, Installation and Service in London
Plumb Heat Direct offer boiler breakdown, repairs, installations and servicing. All Plumb Heat Direct's vehicles carry a large stock of spare parts for the most popular makes of boilers which help us to fix your problem first time. All engineers are Gas Safe Registered.
All new boiler installations are legally required to be energy efficient condensing boilers. This is a new step made by the Government to ensure that every one is contributing to helping create a greener environment. A study carried out by the Government showed that the newer condensing boilers use 40% less fuel/energy than the older models. Although a new boiler can be a big investment, the savings made in the future means that the new boilers save money and help the environment.
Energy Efficiency Chart
Condensing boilers have been fitted to new homes for many years and are not a new technology, They can be wall mounted or floor standing. The advantage they offer over non-condensing boilers is a reduction in fuel costs. This is achieved because this type of boiler has a more effective heat exchange allowing more heat to be removed from the flue products rather than the heat you have paid for being expelled outside and lost to the atmosphere.
Higher Efficiency Boilers
They tend to have a higher purchase cost than non-condensing boilers although the efficiency savings pay back this extra investment in a few years depending upon the size of your property. It is recognised that a condensing gas boiler tends to have an efficiency of around 88% compared to a non-condensing boiler of about 75%. Both these are significantly higher than old boilers which rate at between 55% -60%.
Types of Condensing Boilers
There are three types of condensing boilers: Combi boilers, system boilers and regular boilers. The main difference between these is the use, or elimination of various parts within a typical system such as the hot water cylinder or the expansion tank.
Which Type of Condensing Boiler?
- I live in a bungalow or a flat and have no loft space - Combi
- I want to convert my loft and use it for a room or I have very limited loft space - Combi
- I live in a house with several people. We need a lot of hot water but don’t want to wait for a hot tank to heat up - Combi
- I have a larger home with two or more bathrooms - Regular or System
- I live in an area which often has low mains water pressure - Regular or System
- I have a conventional central heating system and need to replace the boiler - Combi, Regular or System
Possible side effects
Condensing boilers are often noted for their pluming, a feature sometimes mistaken for steam coming out of the flue. This is caused by water droplets held in suspension in the flue gases condensing in the colder outside atmosphere. Non-hazardous pluming may be a nuisance if the condensation interferes with windows so care is needed in positioning the flue pipe to avoid this. Also a small pipe needs to be run to a drain to allow the condensate to flow away.
The law in England & Wales changed in April 2005, which means only a condensing boiler can be fitted as a replacement boiler or complete new installation. There is a minor loophole to this law where, in exceptional circumstances, the local authority can agree to an exemption certificate allowing a non-condensing boiler to be fitted.
Boiler Efficiency is important, boilers are tested and the relative energy efficiencies are published by the manufacturers. The difference between an old boiler ( perhaps 50% efficient) and the latest condensing boilers ( up to 92% efficiency) represents a considerable difference in energy costs each quarter.
Boiler Regulations must be respected
The installation of gas boilers is governed by several government regulations. Replacement boilers should almost always be condensing boilers. The installer must be GAS SAFE trained. Ventilation must be checked and the flue properly installed.
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