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The Atag A200S Gas System Boiler is ideal for medium size properties with more than one bathroom and a high demand for hot water. The A200S 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 A200S 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 A200S including concentric, twin and flexible liner. For added peace of mind the Atag A200S Gas System Boiler comes with a 5 year manufacturer's warranty.