With 1,700,000 BTU/hr rated output, HM1.7 achieves tank temperatures up to 190°F. VFD allows precise outlet water temperature control, while horizontal design aids service with facilitated access to burner. While parallel 3-pass coil supports adjustable 60–100 gpm flow rate, digital temperature control system can reach 170°F tank temperature without burner cycling. Features also include rugged 5 hp (3.7 kW) single-stage centrifugal pump as well as safety controls and diagnostic tools.