The Weil-McLain Ultra 3-UE is a discontinued gas boiler with an efficiency of up to 96.4% AFUE. It had a cast aluminum heat exchanger and a stainless steel burner for increased efficiency and cleaner combustion. The unit was designed to operate in low-temperature condensing applications, and a variable speed motor matched combustion output to heating needs. The Ultra 3-UE was designed for both wall-mount and floor-standing applications and was equipped with four adjustable boiler legs.
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