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New from Lochinvar is the EFB range of wall-hung, gas fired, high efficiency condensing boilers featuring low NOx emissions. They incorporate a stainless steel heat exchanger, which is supported by a new ‘Five plus Five’ extended warranty.
NOx emissions are lower than 24mg/kWh, which the company believes to be the lowest level produced by any commercial wall-hung boiler currently available on the UK market. As a result, all EFB models qualify for the maximum two credits awarded for air quality on BREEAM-rated projects.
The new ‘Five plus Five’ warranty covers the heat exchanger, which will be replaced free of charge in the first five years of operating life in the event of a manufacturer’s fault. Thereafter the warranty moves onto a sliding scale where 60% of the cost of replacement will be covered in the sixth year, 40% in years seven and eight, so on down to 20% in the ninth and tenth.
The four models in the range offer outputs from 85 to 151kW. The stainless steel heat exchanger has excellent resistance to corrosion and will operate at working pressures of up to six bar. EFB boilers can be either wall or frame mounted and, at only 440mm wide and 539mm deep, they provide a compact solution for commercial, industrial and large residential buildings.
Up to sixteen units can be installed in a cascade system to provide maximum flexibility and operating reliability in larger projects. EFB cascade mounting frame assemblies are also lower than 1.8m in height, which is helpful for both installation and maintenance.
All four models have integral controls, which include cascade operation, with or without BMS connection. They will manage the cascade system, boiler operation and pumps as well as the cylinder temperature.