Beacon/morris horizontal hydronic unit heater, header type coil style, 104000 btu – hbb144 header type coil style, 144,000 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.