Beacon/morris horizontal hydronic unit heater, header type coil style, 209100 btu – hbb280 header type coil style, 280,000 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.