The patent was granted to R.F. MacDonald Co. for inventing a "process for direct urea injection with selective catalytic reduction (SCR) for NOx reduction in hot gas streams and related systems and assemblies." SCR requires the use and storage of ammonia …
Read MoreJul 05, 2015 · Most Burnham boilers are gas-fired, but Burnham does have oiled-fired boilers. While the fuel changes from gas to oil, the efficiency rating is decent for the oil boiler. Rated at 87% AFUE, Burhham's MPO-IQ oil-fired boiler is for people who use oil for heating fuel.
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