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The BIG Lockdown Glow-Up Competition

We've teamed up with Big Bathroom Shop to find the best DIY lockdown upgrades. Enter yours to be in with a chance of winning £1000 to spend with us!
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What is an open vent or gravity heating system?

An open vent or gravity heating system is one which features a feed and expansion tank, positioned at the system’s highest point. They are only compatible with heat-only boilers, otherwise known as ‘regular’ boilers. The ‘open…
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What does ‘unvented cylinder’ mean?

‘Unvented cylinder’ refers to a chamber which is kept under pressure by an incoming water supply. The direct model sees this water directly heated by immersion heaters, whilst the indirect model utilises a heat source located outside…
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What is a sealed heating system?

A sealed heating system is one fed by a ‘filling loop’, which is connected to the mains water supply through a flexible pipe. The purpose of the loop is to fill the heating system to a pre-set pressure when the system is cold, typically…
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What is a heating system flush?

A heating system flush is a chemical solution that removes sludge, rust and other unwanted debris from within a central heating system or boiler, helping it to perform to its full capacity. Also known as a ‘power flush’, the solution…