MHS provides the remedy for low emissions at hospital

boiler room
MHS calorifiers and boilers in the Cotman Centre of Norwich & Norfolk University Hospital are achieving high efficiency and low NOx emissions.
The low energy consumption and emissions of Ultramax boilers and Gemini calorifiers are being exploited in the Cotman Centre of Norwich & Norfolk University Hospital to provide space heating and domestic hot water. The 2-storey centre houses the radiology academy, which trains doctors in diagnostic imaging such as X-rays, CT and MRI scans, and the hospital’s pathology department. Consultant Integrated Building Services of Cambridge specified three 300 kW Ultramax floor-standing boilers and three Gemini 500 high-recovery calorifiers. A key feature in the low emissions of Ultramax boilers is the downward-firing pre-mix, water-cooled burner, which achieves precise mixing of gas and air. Because system water circulates inside the burner, the combustion temperature is 1200 to 1300°C. This is lower than the normal 1500°C and reduces NOx emissions to a yearly average figure of less than 32 mg/kWh. Heat output can be modulated to 25% of full output. Gemini high-performance calorifiers use the tank-in-tank system. The domestic hot water is heated and stored in a stainless-steel vessel within an indirectly heated primary tank. This system provides a very large surface area for heat exchange, which achieves high performance and rapid recovery and also eliminates the cool zone where bacteria can breed.
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