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Potterton Commercial's Sirius Three Wall Hung Natural Gas Condensing Boiler is designed for versatility and efficiency. Made from stainless steel, these compact and lightweight boilers are ideal for large domestic or medium-sized commercial use. Single outputs range from 50kW to 250kW and can achieve cascade outputs up to 700kW with the integrated cascade option. The boiler achieves up to 97.3% gross seasonal efficiency with standard weather compensation. The 9:1 modulation ratio minimizes cycling, boosting efficiency and lifespan. Features include a user-friendly display and advanced programming. The boilers are ErP compliant, aiding carbon emission reduction and meeting government efficiency goals. Designed for easy installation, they offer reliable heat transfer and have a reduced carbon footprint. The Sirius Three is available with outputs from 50kW to 150kW, ensuring energy efficiency and reliability.. Potterton Commercial Sirius Three Wall Hung Natural Gas Condensing Boiler - 60kW 7705086