What Do Boiler Performance Technical Specifications Mean?

Difference Between Combi and Heat Boilers

It is without a doubt that the humble boiler still remains to be a necessity for British homes. The following are some questions that are frequently asked by homeowners regarding boilers.

What does DHW mean on my boiler?

DHW stands for Domestic Hot Water. In combination boilers the central heating and DHW are combined into one device. Once activated, the combination boiler stops pumping water to the heating circuit and then diverts all of the power of the boiler to heating DHW.

What does CH output mean on my boiler?

CH stands for central heating. It is a way of providing heat in a home through a central source. When it comes to boilers, the central heating system comes in any of the following three types, which are;

  • Wet systems that involve a boiler/heat exchanger as well as radiators
  • Storage heaters
  • Warm air system

What does SEDBUK rate mean on my boiler?

SEDBUK stands for Seasonal Efficiency of a Domestic Boiler in the UK. This is basically a rating system for a boiler’s efficiency which was developed by the UK government and boiler manufacturers to compare the quality and efficiency of boilers. The SEDBUK rating also helps homeowners reduce their carbon footprint and get a cost effective boiler for their home.

How is it Calculated?

SEDBUK ratings are calculated by using a range of factors that contribute to the boiler’s efficiency, such as boiler type, climate where the boiler is being used, amount of fuel used, usage patterns, and heating controls. Since 2010, all boilers in the UK are required to have a SEDBUK ratings of A, which means that the boiler is 88% energy efficient, but since then some of the newer boiler models are able to reach efficiency levels of around 35%.

What does NOx Classification mean on my boiler?

NOx refers to two gases namely, NO and NO2, both of which contribute to smog and acid rain. Boiler manufacturers have to select from five classes, Class 5 being the boiler that’s most efficient.

What does Optional LPG kit mean on my boiler?

LPG has become the preferred non-mains-gas fuel that’s mostly used in boilers in the UK, this is thanks to its similarity with natural gas and its versatility. There’s a wide variety of high efficiency LPG boilers available in the market today by some of the leading boiler manufacturers in the UK. For almost all natural gas boilers there are LPG conversion kits available. These kits are a simple and easy way of converting natural gas boilers to the more efficient LPG.

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