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Edward Lowton
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Rng main boost
27 January 2014
Atlantic Boilers of Lancashire has supplied University College London with a boiler house that operates throughout the year at 95˚C flow and 75˚C return, and contributes to the UCL ring main that serves scores of buildings, large and small.

Normally these ring main temperatures do not allow condensing, but the Atlantic RT add-on condensing exchanger leads to year round efficiencies of 92-97% GCV (102-107% NCV). To maintain this, three Atlantic TRP 3-pass gas-fired boilers, rated at 700kW, pass the flue gases into the RT add-on where the gases are cooled by the combustion air volume to give condensing conditions.
The warmed combustion air increases the efficiency of each burner. This system permits the combustion of gas or oil, and also B100 bio-diesel.