FORT WAYNE, Ind.  WaterFurnace International announced a 9.4% price increase across all commercial and residential product lines in reaction to rising supply chain costs and commodity inflationary pressures. For all commercial product lines, the price increase came into effect March 31, 2022, at 8:00 a.m. ET. For all residential product lines, the price increase will come into effect on May 2, 2022.