From fishing to sailing and all I/O or inboard powered boats in between. This 28,000 BTU flush mount, grilled heater fits easily in stairwells, cabin interiors or cockpit areas. Kit includes 1-Heater unit with wire harness, 1-Flush mount grill 1 switch plate with rocker switch and indicator assembly (HIGH and LOW) and 2-6' lengths of 16 gauge wire. Amperage: Low 2.0, High 4.5BTU: 28,000Air Flow: Low 172 cfm, High 263 cfmHose barb: 5/8"Grill Size: 7.5"H x 11.3"