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Appliance details <br /> 2 Appliance details <br /> 2.1 GWH 1600 H specifications Dimensions <br /> (Technical data) • Depth (in): 8.66" (220 mm) <br /> Approved in US/Canada • Width (in): 16.73" (425 mm) <br /> Capacity • Height (in): 25.79" (655 mm) <br /> GWH 1600 H: 4.36 GPM • Weight: 35 pounds (16 kg). <br /> Maximum output Gas types <br /> GWH 1600 H: 91,525 Btu/hr Natural Gas. <br /> LP Gas <br /> Maximum input Safety devices <br /> GWH 1600 H: 117,000 Btu/hr <br /> • Flame failure device (ionization flame rod sensor) <br /> Efficiency in% • Pressure relief valve (supplied with heater) <br /> Recovery efficiency 80% <br /> • Over heat prevention (temperature limiter). <br /> Min.Output <br /> GWH 1600 H: 23,906 Btu/hr <br /> Gas Requirement <br /> Gas connection (inches)-3/4" NPT <br /> Inlet gas pressure under maximum operation* <br /> • Propane: 10.5" - 14"water column <br /> • Natural Gas: 5.7"- 14"water column. <br /> * To measure Gas Pressure, see Measuring Gas <br /> Pressure, chapter 3.8. <br /> Venting <br /> • Natural Draft <br /> • Vent diameter(inches) -5" <br /> • Minimum height (feet) - 6'with no elbows <br /> • Vertical termination <br /> • Sidewall termination only with AO4 power vent kit. <br /> Water <br /> • Hot water connection (inches) - 1/2" NPT <br /> • Cold water connection (inches) - 1/2" NPT <br /> • Water valve material: Fibreglass reinforced <br /> polyamide (PA) <br /> • Minimum water flow: 0.6 gallon/minute (2.2 I/m) <br /> • Minimum recommended water pressure: 30 PSI <br /> (2.07 bar) <br /> • Connections: <br /> — Bottom of heater <br /> 6 720 608 032 3 <br />