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The Honeywell DU144 Automatic Bypass Valve controls the flow of water through a bypass circuit installed between the flow and return pipework, near or at the boiler. Building regulations advice that if a bypass is installed that an automatic bypass valve must be fitted. The DU144 Automatic Bypass Valve saves energy by only allowing flow through the bypass when it is needed, for example when flow through the system is reduced due to zone valves or radiator thermostatic valves are closing.
The Atag A320S Gas System Boiler is ideal for medium to large size properties with more than one bathroom and a high demand for hot water. The A320S Gas System Boiler is fitted with a stainless steel heat exchanger to ensure optimum efficiency and with a pre mix burner for seamless modulation has SEDBUK 'A' rating. The A320S also features a built in weather dependent energy management centre and user friendly Z ready control option. There is also an extensive range of flue options available for the A320S including concentric, twin and flexible liner. For added peace of mind the Atag A320S Gas System Boiler comes with a 5 year manufacturer's warranty.