Direct-Fired Heater Demand Buoyed by their Ability to Attain 100% Efficiency, Accounting for 70% Sales: Fact.MR Rockville, MD, June 10, 2019 (GLOBE NEWSWIRE) -- According to the recently published study by Fact.MR, the global sales of fired heaters were close to 695 units in 2018, and are estimated to...