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" th. <br /> Residential / Commercial Gas <br /> CO mi <br /> Tankless Water Heaters <br /> TANKLESS HIGH EFFICIENCY CONDENSING MODELS <br /> Gas Consumption Input Inlet Gas Pressure Ener Dimensions in Inches Unit <br /> Model Energy Maximum Hot/Cold Gas <br /> Number Type Minimum Maximum Minimum Maximum Factor GPM* Connections Connection Weight <br /> BTU/H BTU/H in.W.C. in.W.C. (EF) Height Width Depth (Ibs) <br /> Indoor Models <br /> ATI-24OH-N Natural 15,000 160,000 4.0 10.5 0.95 6.6 3/4"NPT 3/4"NPT 23-5/8 17-314 11-1/4 58 <br /> ATI-24OH-P Propane 13,000 160,000 8.0 14.0 0.95 6.6 3/4"NPT 3/4"NPT 23-5/9 17-3/4 11-1/4 58 <br /> ATI-34OH-N Natural 15,000 180,000 4.0 10.5 0.95 8 3/4"NPT 3/4"NPT 23-5/8 17-3/4 11-114 58 <br /> ATI-34OH-P Propane 13,000 180,000 8.0 14.0 0.95 8 3/4"NPT 3/4"NPT 23-5/8 17-3/4 11-1/4 58 <br /> ATI-54OH-N Natural 15,000 199,000 4.0 10.5 0.95 10 3/4"NPT 314"NPT 23-5/8 17-3/4 11-1/4 59 <br /> ATI-54OH-P Pro ane 13,000 199,000 8.0 14.0 0.95 10 3/4"NPT 314"NPT 23-5/8 17-314 11-114 59 <br /> Outdoor Models <br /> ATO-24OH-N Natural 15,000 160,000 4.0 10.5 0.95 6.6 3/4"NPT 314"NPT 23-5/8 17-3/4 11-1/4 58 <br /> ATO-24OH-P Propane 13,000 160,000 8.0 14.0 0.95 6.6 3/4"NPT 3/4"NPT 23-5/8 17-3/4 11-1/4 58 <br /> ATO-34OH-N Natural 15,000 180,000 4.0 10.S 0.95 8 3/4"NPT 3/4"NPT 23-5/8 17-3/4 11-114 58 <br /> ATO-34OH-P Propane 13,000 180,000 8.0 14.0 0.95 8 3/4"NPT 314"NPT 23-5/8 17-3/4 11-1/4 58 <br /> ATO-54OH-N Natural 15,000 199,000 4.0 10.5 0.95 10 3/4"NPT 314"NPT 23-5/8 17-314 11-114 59 <br /> ATO-54OH-P Propane 13,000 199,000 8.0 14.0 0.95 10 3/4"NPT 314"NPT 23-5/8 17-3/4 11-114 59 <br /> 15-150 PSI Water Pressure.40 PSI or above recommended for maximum flow. <br /> •Current numbers based on factory testing;0.5 GPM for activation;0.4 GPM required for continuous fire after initial ignition. <br /> Indoor models are certified from sea level to 10,100 ft.elevations.Outdoor models are certified from sea level to 6,000 ft.elevation. <br /> Page 2 of 6 <br /> AOSRG46835 <br />