Previous Name : N-0531S-OD-NG
| Residential or Commercial | Residential |  | |
| Installation Location | Outdoor Only | | |
| Exhaust Type | Frontal Exhaust |  | |
| Max Flow Rate | 6.6 GPM | | |
| Flow Rate @ 50°F Rise | 4.6 GPM | | |
| Flow Rate @ 80°F Rise | 2.9 GPM | | |
| Temperature Range | 100°F - 160°F | | |
| Production Status | Discontinued | | |
| Condensing | No | | |
| Minimum Activation Flow Rate | 0.5 | | |
| Water Quality | Treatment May Be Necessary | | |
| Freeze Protection | Yes | | |
| Freeze Protection Rating - Indoor Temp | N/A | | |
| Freeze Protection Rating - Outdoor Temp | -4°F | | |
| Recirculation Compatible? | Yes | | |
| New Generation Model Number | N/A | | |
| Previous Name | N-0531S-OD-NG | | |
| Available Temperature Settings (with remote) | 100, 105, 110, 115, 120, 125, 130, 135, 140, 145, 150, 160°F | | |
| Default Temperature Setting (without remote) | 120°F | | |
| Default Temperature Program Setting Options (without remote) | 120, 130, 140°F | | |
| Production Date Range | 1/2020-Present | | |
| Min Gas Input (Btu) | 15,000 | | |
| Max Gas Input (Btu) | 140,000 | | |
| Height (in) | 20.5 | | |
| Width (in) | 13.8 | | |
| Depth (in) | 6.7 | | |
| Weight (lbs) | 36 | | |
| Thermal Efficiency | 83% | | |
| Energy Factor | UEF 0.82 | | |
| Afue | N/A | | |
| Quick-Connect Compatible? | No | | |
| Cold Water Connection Size (in) | 3/4 | | |
| Hot Water Connection Size (in) | 3/4 | | |
| Gas Connection Size (in) | 3/4 | | |
| Power Supply | 120 VAC (60 Hz) | | |
| Current Draw (A) | 1.175 | | |
| Exhaust Vent Diameter Requirements | N/A | | |
| Exhaust Vent Material Requirements | N/A | | |
| Max Vent Length with 1 elbow | N/A | | |
| Vent Termination Clearances to Any Building Opening (ft) | Below = 1’, Side = 1’, or Above = 1’ | | |
| Gas Supply Pressure Range | 3.5-10.5" WC | | |
| Min Gas Line Size | 3/4" up to 50’ | | |
| Water Pressure Rating (psi) | 15-150 | | |
| Case Clearances (in) | Top = 36", Front = 24", Sides = 6", Back = 0" | | |
| Combustion Air Requirements - using Indoor Air | N/A | | |
| Combustion Air Requirements - using Outdoor Air | N/A | | |
| Head Loss at 2 gpm | 4.62 ft of head | | |
| Cold Connection Height | 1.9" | | |
| Power Consumption w/out Freeze Prevention | 52 Watts | | |
| Power Consumption w/Freeze Prevention | 141 Watts | | |
| Flow Meter Alarm | Yes, with optional remote | | |
| Service Reminder | No | | |
| Condensate Handling Method? | N/A | | |
| Noise Rating (dB) | Less than 60 dB | | |
| Tested to UL Computer Controlled Safety Standards | Yes | | |
| Flame Sensor | Yes | | |
| High Limit Switch | Yes | | |
| Lightning Protection | Yes | | |
| Overheat Cutoff Fuse | Yes | | |
| Temperature Lockout | Yes | | |
| Ignition Type | Direct Electronic | | |
| Case Material | Durable Steel Casing with Polyester Coating | | |
| Color/Finish | Beige | | |
| Flue Collar Material | Stainless Steel | | |
| Primary Heat Exchanger Material | Copper | | |
| Secondary Heat Exchanger Material | N/A | | |
| Mounting Type | Wall Hung | | |
| Package Contents | Cross Recess Head Screws, Owner’s Guide, Warranty, Installation Manual | | |
| Water Holding Capacity | 0.2 gallons | | |
| Keypad/Thermostat Display | Not included | | |
| Compatible Remote Controller Part # | RC-7649M | | |
| Isolator Valve Part # | IK-WV-200-1-xx | | |
| Freeze Protection | Yes | | |
| Freeze Protection Kit Accessory | N/A | | |
| Outdoor Vent Cap Part # | N/A | | |
| Pipe Cover Part # | PC-1 | | |
| Recess Box Part # | RB-500 | | |
| High Elevation Adjustment | Yes | | |
| Quick-Connect Cord Part # | N/A | | |
| System Controller Compatible? | No | | |
| System Controller Part # | N/A | | |
| Remote Controller Cord | Included | | |
| Compatible Remote Controller Cord Part # | N/A | | |
| Power Cord | N/A | | |
| | | | |
| ENERGY STAR® Qualified | No | | |
| CSA | Yes | | |
| Mobile Home | Yes | | |
| NSF | Yes | | |
| SCAQMD (20 ppm) | No | | |
| SCAQMD (55 ppm) | Yes | | |
| UPC | Yes | | |
| Energy Guide - Est. Yearly Energy Use | 150 gallons | | |
| Energy Guide - Est. Yearly Operating Cost | $365 | | |
| UPC Low Lead | Yes | | |
| ASME (HLW) | No | | |
| ASME (H) | No | | |
| ASME (NB) | No | | |
| | | | |
| Heat Exchanger Warranty (w/out Recirculation) | 12 Years | | |
| Heat Exchanger Warranty (w/Recirculation) | 3 Years | | |
| Residential or Commercial | Residential | | |
| Installation Location | Outdoor Only | | |
| Exhaust Type | Frontal Exhaust | | |
| Max Flow Rate | 6.6 GPM | | |
| Flow Rate @ 50°F Rise | 4.6 GPM | | |
| Flow Rate @ 80°F Rise | 2.9 GPM | | |
| Temperature Range | 100°F - 160°F | | |
| Production Status | Discontinued | | |
| Condensing | No | | |
| Minimum Activation Flow Rate | 0.5 | | |
| Water Quality | Treatment May Be Necessary | | |
| Freeze Protection | Yes | | |
| Freeze Protection Rating - Indoor Temp | N/A | | |
| Freeze Protection Rating - Outdoor Temp | -4°F | | |
| Recirculation Compatible? | Yes | | |
| New Generation Model Number | N/A | | |
| Previous Name | N-0531S-OD-NG | | |
| Available Temperature Settings (with remote) | 100, 105, 110, 115, 120, 125, 130, 135, 140, 145, 150, 160°F | | |
| Default Temperature Setting (without remote) | 120°F | | |
| Default Temperature Program Setting Options (without remote) | 120, 130, 140°F | | |
| Production Date Range | 1/2020-Present | | |
| Min Gas Input (Btu) | 15,000 | | |
| Max Gas Input (Btu) | 140,000 | | |
| Height (in) | 20.5 | | |
| Width (in) | 13.8 | | |
| Depth (in) | 6.7 | | |
| Weight (lbs) | 36 | | |
| Thermal Efficiency | 83% | | |
| Energy Factor | UEF 0.82 | | |
| Afue | N/A | | |
| Quick-Connect Compatible? | No | | |
| Cold Water Connection Size (in) | 3/4 | | |
| Hot Water Connection Size (in) | 3/4 | | |
| Gas Connection Size (in) | 3/4 | | |
| Power Supply | 120 VAC (60 Hz) | | |
| Current Draw (A) | 1.175 | | |
| Exhaust Vent Diameter Requirements | N/A | | |
| Exhaust Vent Material Requirements | N/A | | |
| Max Vent Length with 1 elbow | N/A | | |
| Vent Termination Clearances to Any Building Opening (ft) | Below = 1’, Side = 1’, or Above = 1’ | | |
| Gas Supply Pressure Range | 3.5-10.5" WC | | |
| Min Gas Line Size | 3/4" up to 50’ | | |
| Water Pressure Rating (psi) | 15-150 | | |
| Case Clearances (in) | Top = 36", Front = 24", Sides = 6", Back = 0" | | |
| Combustion Air Requirements - using Indoor Air | N/A | | |
| Combustion Air Requirements - using Outdoor Air | N/A | | |
| Head Loss at 2 gpm | 4.62 ft of head | | |
| Cold Connection Height | 1.9" | | |
| Power Consumption w/out Freeze Prevention | 52 Watts | | |
| Power Consumption w/Freeze Prevention | 141 Watts | | |
| Flow Meter Alarm | Yes, with optional remote | | |
| Service Reminder | No | | |
| Condensate Handling Method? | N/A | | |
| Noise Rating (dB) | Less than 60 dB | | |
| Tested to UL Computer Controlled Safety Standards | Yes | | |
| Flame Sensor | Yes | | |
| High Limit Switch | Yes | | |
| Lightning Protection | Yes | | |
| Overheat Cutoff Fuse | Yes | | |
| Temperature Lockout | Yes | | |
| Ignition Type | Direct Electronic | | |
| Case Material | Durable Steel Casing with Polyester Coating | | |
| Color/Finish | Beige | | |
| Flue Collar Material | Stainless Steel | | |
| Primary Heat Exchanger Material | Copper | | |
| Secondary Heat Exchanger Material | N/A | | |
| Mounting Type | Wall Hung | | |
| Package Contents | Cross Recess Head Screws, Owner’s Guide, Warranty, Installation Manual | | |
| Water Holding Capacity | 0.2 gallons | | |
| Keypad/Thermostat Display | Not included | | |
| Compatible Remote Controller Part # | RC-7649M | | |
| Isolator Valve Part # | IK-WV-200-1-xx | | |
| Freeze Protection | Yes | | |
| Freeze Protection Kit Accessory | N/A | | |
| Outdoor Vent Cap Part # | N/A | | |
| Pipe Cover Part # | PC-1 | | |
| Recess Box Part # | RB-500 | | |
| High Elevation Adjustment | Yes | | |
| Quick-Connect Cord Part # | N/A | | |
| System Controller Compatible? | No | | |
| System Controller Part # | N/A | | |
| Remote Controller Cord | Included | | |
| Compatible Remote Controller Cord Part # | N/A | | |
| Power Cord | N/A | | |
| | | | |
| ENERGY STAR® Qualified | No | | |
| CSA | Yes | | |
| Mobile Home | Yes | | |
| NSF | Yes | | |
| SCAQMD (20 ppm) | No | | |
| SCAQMD (55 ppm) | Yes | | |
| UPC | Yes | | |
| Energy Guide - Est. Yearly Energy Use | 150 gallons | | |
| Energy Guide - Est. Yearly Operating Cost | $365 | | |
| UPC Low Lead | Yes | | |
| ASME (HLW) | No | | |
| ASME (H) | No | | |
| ASME (NB) | No | | |
| | | | |
| Heat Exchanger Warranty (w/out Recirculation) | 12 Years | | |
| Heat Exchanger Warranty (w/Recirculation) | 3 Years | | |
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