Alpha Flowsmart

When it comes to choosing a boiler for the larger household with high domestic hot water demands, it's often the system boiler that wins through despite the fact that its less energy efficient than the combination boiler.

This is usually due to the fact that, unlike the system boiler, issues exist concerning the combination boilers flow rate in multi-bathroom dwellings.

FlowSmart changes all this, for the first time enabling the specifier to confidently choose a combi boiler set-up regardless of the potential demands put on it for DHW.

The FlowSmart package features a SEDBUK 'A' rated CD35C combi boiler, with the addition of a GasSaver flue gas heat recovery unit and small thermal store of either 25 or 50 litres.

When DHW is demanded, mains cold water first passes through the GasSaver, where it benefits from recovered boiler flue gas heat. It is then sent through a copper coil heat exchanger within the thermal store, which is surrounded by hot water from the primary system. This raises its temperature further before entering the boiler.

With less work to do to raise the temperature of the mains water, the combi is more than capable of delivering hot water at the required flow rate regardless of demand.

FlowSmart can be activated either manually or by timer control. This ensures that water held within the thermal store is at the correct temperature when there is a demand for DHW.

As there is no hot water cylinder or cold water tank, the FlowSmart system is extremely easy to site and can be wallhung in a space smaller than the average airing cupboard.

FlowSmart exceeds the performance of either a combination boiler on its own or a system boiler, delivering 18 litres of water per minute, at 50°C or higher for up to 30 minutes and using far less gas in doing so.