Beacon/morris horizontal hydronic unit heater, header type coil style, 52300 btu – hbb072 header type coil style, 72,000 btu horizontal hydronic unit heater, non-osha standard guard, approved for water/steam applications, 20 gauge steel casing, seamless copper tubing coil with aluminum fin design, coil brazed into extruded header junctions, etl certified at 200 ewt and 2 psi steam.