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Product code: S12439
Image shown for illustration purposes only.
View Large ImageSuitable for a wide range of projects of different sizes requiring up to 440kW, the Potterton Sirius Three 70 floor standing condensing boiler is extremely compact and easy to fit. With modulation ratios of up to 9:8, a reliable stainless steel heat exchanger and the lowest NOx rating available, the Sirius Three is ErP A-rated for energy efficiency and offers a gross seasonal efficiency of up to 97.5%. This boiler can be installed as part of a cascade system.