Boilers offer two return connections for different temperatures

There are two return connections on the Ultramax SB range of boilers from MHS Boilers. One connection enters the condensing heat exchanger, and the other is at a temperature above the dewpoint temperature of flue gases. There are 10 models, offering outputs from 300 to 1000 kW, modulating down to 25% of full output. A key to the low emissions of these boilers is the downward-firing, water-cooled, pre-mix burners. Water cooling reduces the combustion temperature from 1500°C to 1200 to 1300 °C. NOx emissions are 14 to 17 ppm (25 to 30 mg/kWh). There is a comprehensive range of control options, including weather compensation. One control option provides weather compensation for two separate heating circuits. A boiler cascade manager can link up to eight boilers.

Related links:

• www.mhsboilers.com