Boilers: Compare features & prices

Side-by-side comparison

Output CH Min/Max (KW)
The manufacturers' claimed minimum and maximum central heating output in condensing mode.

Size (HxWxD) (cm)
Measurements of the boiler excluding any space needed for ventilation or cables.

LPG convertible
Whether the boiler can be converted to burn liquid petroleum gas.

Declared Sedbuk energy efficiency category
The Sedbuk rating is an energy label, similar to those found on domestic appliances. A is the highest and lower than B does not comply with new building regulations.

Measured Sedbuk energy efficiency category
How our measured values compared with the manufacturers' claims for energy efficiency. A is the highest and lower than B does not comply with new building regulations.

Efficiency
Results measure the heat output versus energy input, with the boiler working at full and partial capacity.

Power use
Electricity consumption in operation and heat loss from the casing.

NOx emissions
Measured emissions of the polluting gases NOx by the boilers while working at a steady state.

Features
Whether the boiler includes helpful features such as a timer or space to install one, temperature controls, a status display or operating status LEDs.

Installing
How easy it was to install, according to our Corgi expert

Every day ease of use
How easy it is to program and control the boiler.

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