Commercial Appliances
Commercial Integrated Heating and Ventilating Appliance
This is a further development of the residential unit. The commercial unit can cope with much higher ventilation air flows than the residential scale model and is designed to be located outdoors on the rooftop.
CGRI developed a high efficiency condensing fire tube boiler originally intended for use as a gate station heater for gas utility pipeline pressure reducing and metering stations. This equipment was licensed to Admic Systems Ltd. and redesigned for use as high pressure central heating hydronic boiler. It features a nominal 1.0 - 1.5 million Btu/h (293 - 439 kW) maximum input, a seasonal efficiency in the 90% plus range based on the natural gas higher heating value, has low NOx emissions (20 - 40 ppm normalized to 3% O2), and operates with a 6:1 turndown ratio.
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CGRI developed a premix ceramic fibre radiant burner capable of a wide turndown ratio approaching 20:1. This burner is operable over a wide gas/air mixture range, exhibits high resistance to thermal shock and has low NOx
emissions. This burner technology has been licensed to Admic Systems Ltd. and is being used in the high efficiency condensing boiler. Original burner installations have amassed over 20,000 operating hours with exceptional results. The burner's radiant output assists the total heat transfer especially at high turndown input rates and achieves more uniform combustion chamber wall temperatures than a traditional blue flame burner. 