Combi Boiler Installation

A combi (combination) boiler heats your hot water on demand, the moment you turn on a tap, and it powers your radiators too, all from one compact unit. There is no hot water cylinder in the airing cupboard and no cold-water or feed-and-expansion tanks in the loft, which is why combis are the most popular choice in Newport flats, terraces and smaller family homes.

How a combi boiler heats your water

When you open a hot tap or start the shower, the combi fires up and heats water instantly as it passes through, drawing cold water directly from the mains. Nothing is stored, so you are not waiting for a tank to reheat and you are not paying to keep a cylinder of water hot around the clock.

That same boiler runs your central heating on a separate circuit, so heating and hot water are handled by a single wall-mounted unit.

Who a combi boiler suits

Combis are ideal when hot water demand rarely overlaps, such as a one-bathroom home where the shower and the kitchen tap are not usually running at the same moment. Because there are no tanks, they are also the natural choice where space is tight or you want to reclaim the airing cupboard and loft.

If you have two or more bathrooms and people often shower at the same time, a system boiler with a stored cylinder usually delivers better simultaneous flow. See our guide to choosing a boiler to compare.

What our combi installation includes

Every combi package is a genuine all-in, VAT-inclusive fixed price: the boiler, a standard flue and fittings, a full system flush, a magnetic filter to protect the new boiler, a wireless programmable thermostat and a manufacturer guarantee of up to 18 years on ATAG, all fitted by our named Gas Safe registered engineers.