| Residential or Commercial | Commercial |  | |
| Installation Location | Indoor or Outdoor with Vent Cap | | |
| Exhaust Type | Single Vent | | |
| Max Flow Rate | 13.2 GPM | | |
| Flow Rate @ 50°F Rise | 12.5 GPM | | |
| Flow Rate @ 80°F Rise | 7.8 GPM | | |
| Temperature Range | 100°F - 180°F | | |
| Production Status | Active | | |
| Condensing | No | | |
| Minimum Activation Flow Rate | 0.7 | | |
| Water Quality | Treatment May Be Necessary | | |
| Freeze Protection | Yes | | |
| Freeze Protection Rating - Indoor Temp | -30°F | | |
| Freeze Protection Rating - Outdoor Temp | -4°F | | |
| Recirculation Compatible? | Yes | | |
| New Generation Model Number | N/A | | |
| Previous Name | N-1321M-ASME-NG | | |
| Available Temperature Settings (with remote) | 100, 105, 110, 115, 120, 125, 130, 135, 140, 145, 150, 160, 170, 180°F | | |
| Default Temperature Setting (without remote) | 120°F | | |
| Default Temperature Program Setting Options (without remote) | 120, 130, 140, 180°F | | |
| Production Date Range | 10/2007 - Present | | |
| Min Gas Input (Btu) | 22500 | | |
| Max Gas Input (Btu) | 380000 | | |
| Height (in) | 29.7 | | |
| Width (in) | 19.1 | | |
| Depth (in) | 11.8 | | |
| Weight (lbs) | 106 | | |
| Thermal Efficiency | 80% | | |
| Energy Factor | N/A | | |
| Afue | N/A | | |
| Quick-Connect Compatible? | Yes | | |
| Cold Water Connection Size (in) | 1 | | |
| Hot Water Connection Size (in) | 1 | | |
| Gas Connection Size (in) | 3/4 | | |
| Power Supply | 120 VAC (60 Hz) | | |
| Current Draw (A) | 3.091 | | |
| Exhaust Vent Diameter Requirements | 5" | | |
| Exhaust Vent Material Requirements | Category III Stainless Steel | | |
| Max Vent Length with 1 elbow | 45’ | | |
| Vent Termination Clearances to Any Building Opening (ft) | Below = 4’, Side = 4’, or Above = 1’ | | |
| Gas Supply Pressure Range | 5 - 10.5" WC | | |
| Min Gas Line Size | 1" up to 20’ | | |
| Water Pressure Rating (psi) | 15-150 | | |
| Case Clearances (in) | Top = 12", Front = 4", Sides = 2", Back = 0" | | |
| Combustion Air Requirements - using Indoor Air | 380 in² | | |
| Combustion Air Requirements - using Outdoor Air | 100 in² | | |
| Head Loss at 2 gpm | 4.62 ft of head | | |
| Cold Connection Height | 2.2" | | |
| Power Consumption w/out Freeze Prevention | 137 Watts | | |
| Power Consumption w/Freeze Prevention | 371 Watts | | |
| Flow Meter Alarm | Yes | | |
| 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 | No | | |
| Ignition Type | Direct Electronic | | |
| Case Material | Durable Stainless Steel Casing | | |
| Color/Finish | Stainless Steel | | |
| Flue Collar Material | Stainless Steel | | |
| Primary Heat Exchanger Material | Copper | | |
| Secondary Heat Exchanger Material | N/A | | |
| Mounting Type | Wall Hung | | |
| Package Contents | Anchoring Screws, Remote Controller, Remote Controller Cord, Owner’s Guide, Warranty, Installation Manual, Heat Exchanger Inspection Report | | |
| Water Holding Capacity | 0.6 gallons | | |
| Keypad/Thermostat Display | Included | | |
| Compatible Remote Controller Part # | RC-7649M | | |
| Isolator Valve Part # | IK-WV-300-1-xx | | |
| Freeze Protection | Yes | | |
| Freeze Protection Kit Accessory | N/A | | |
| Outdoor Vent Cap Part # | VC-132 | | |
| Pipe Cover Part # | PC-4S-SUS | | |
| Recess Box Part # | N/A | | |
| High Elevation Adjustment | Yes | | |
| Quick-Connect Cord Part # | QC-1 | | |
| System Controller Compatible? | Yes | | |
| System Controller Part # | SC-201-6M, -12M, -24M | | |
| Remote Controller Cord | Included | | |
| Compatible Remote Controller Cord Part # | RC-CORD10 | | |
| Power Cord | Not included | | |
| |
| ENERGY STAR® Qualified | No | | |
| CSA | Yes | | |
| Mobile Home | No | | |
| NSF | Yes | | |
| SCAQMD (20 ppm) | No | | |
| SCAQMD (55 ppm) | Yes | | |
| UPC | No | | |
| Energy Guide - Est. Yearly Energy Use | N/A | | |
| Energy Guide - Est. Yearly Operating Cost | | | |
| UPC Low Lead | Yes | | |
| ASME (HLW) | Yes | | |
| ASME (H) | No | | |
| ASME (NB) | Yes | | |
| |
| Heat Exchanger Warranty (w/out Recirculation) | 5 Years | | |
| Heat Exchanger Warranty (w/Recirculation) | 5 Years | | |
| Parts Warranty | 5 Years | | |
| Labor Warranty | 1 Year | | |
| Residential or Commercial | Commercial | | |
| Installation Location | Indoor or Outdoor with Vent Cap | | |
| Exhaust Type | Single Vent | | |
| Max Flow Rate | 13.2 GPM | | |
| Flow Rate @ 50°F Rise | 12.5 GPM | | |
| Flow Rate @ 80°F Rise | 7.8 GPM | | |
| Temperature Range | 100°F - 180°F | | |
| Production Status | Active | | |
| Condensing | No | | |
| Minimum Activation Flow Rate | 0.7 | | |
| Water Quality | Treatment May Be Necessary | | |
| Freeze Protection | Yes | | |
| Freeze Protection Rating - Indoor Temp | -30°F | | |
| Freeze Protection Rating - Outdoor Temp | -4°F | | |
| Recirculation Compatible? | Yes | | |
| New Generation Model Number | N/A | | |
| Previous Name | N-1321M-ASME-NG | | |
| Available Temperature Settings (with remote) | 100, 105, 110, 115, 120, 125, 130, 135, 140, 145, 150, 160, 170, 180°F | | |
| Default Temperature Setting (without remote) | 120°F | | |
| Default Temperature Program Setting Options (without remote) | 120, 130, 140, 180°F | | |
| Production Date Range | 10/2007 - Present | | |
| Min Gas Input (Btu) | 22500 | | |
| Max Gas Input (Btu) | 380000 | | |
| Height (in) | 29.7 | | |
| Width (in) | 19.1 | | |
| Depth (in) | 11.8 | | |
| Weight (lbs) | 106 | | |
| Thermal Efficiency | 80% | | |
| Energy Factor | N/A | | |
| Afue | N/A | | |
| Quick-Connect Compatible? | Yes | | |
| Cold Water Connection Size (in) | 1 | | |
| Hot Water Connection Size (in) | 1 | | |
| Gas Connection Size (in) | 3/4 | | |
| Power Supply | 120 VAC (60 Hz) | | |
| Current Draw (A) | 3.091 | | |
| Exhaust Vent Diameter Requirements | 5" | | |
| Exhaust Vent Material Requirements | Category III Stainless Steel | | |
| Max Vent Length with 1 elbow | 45’ | | |
| Vent Termination Clearances to Any Building Opening (ft) | Below = 4’, Side = 4’, or Above = 1’ | | |
| Gas Supply Pressure Range | 5 - 10.5" WC | | |
| Min Gas Line Size | 1" up to 20’ | | |
| Water Pressure Rating (psi) | 15-150 | | |
| Case Clearances (in) | Top = 12", Front = 4", Sides = 2", Back = 0" | | |
| Combustion Air Requirements - using Indoor Air | 380 in² | | |
| Combustion Air Requirements - using Outdoor Air | 100 in² | | |
| Head Loss at 2 gpm | 4.62 ft of head | | |
| Cold Connection Height | 2.2" | | |
| Power Consumption w/out Freeze Prevention | 137 Watts | | |
| Power Consumption w/Freeze Prevention | 371 Watts | | |
| Flow Meter Alarm | Yes | | |
| 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 | No | | |
| Ignition Type | Direct Electronic | | |
| Case Material | Durable Stainless Steel Casing | | |
| Color/Finish | Stainless Steel | | |
| Flue Collar Material | Stainless Steel | | |
| Primary Heat Exchanger Material | Copper | | |
| Secondary Heat Exchanger Material | N/A | | |
| Mounting Type | Wall Hung | | |
| Package Contents | Anchoring Screws, Remote Controller, Remote Controller Cord, Owner’s Guide, Warranty, Installation Manual, Heat Exchanger Inspection Report | | |
| Water Holding Capacity | 0.6 gallons | | |
| Keypad/Thermostat Display | Included | | |
| Compatible Remote Controller Part # | RC-7649M | | |
| Isolator Valve Part # | IK-WV-300-1-xx | | |
| Freeze Protection | Yes | | |
| Freeze Protection Kit Accessory | N/A | | |
| Outdoor Vent Cap Part # | VC-132 | | |
| Pipe Cover Part # | PC-4S-SUS | | |
| Recess Box Part # | N/A | | |
| High Elevation Adjustment | Yes | | |
| Quick-Connect Cord Part # | QC-1 | | |
| System Controller Compatible? | Yes | | |
| System Controller Part # | SC-201-6M, -12M, -24M | | |
| Remote Controller Cord | Included | | |
| Compatible Remote Controller Cord Part # | RC-CORD10 | | |
| Power Cord | Not included | | |
| |
| ENERGY STAR® Qualified | No | | |
| CSA | Yes | | |
| Mobile Home | No | | |
| NSF | Yes | | |
| SCAQMD (20 ppm) | No | | |
| SCAQMD (55 ppm) | Yes | | |
| UPC | No | | |
| Energy Guide - Est. Yearly Energy Use | N/A | | |
| Energy Guide - Est. Yearly Operating Cost | | | |
| UPC Low Lead | Yes | | |
| ASME (HLW) | Yes | | |
| ASME (H) | No | | |
| ASME (NB) | Yes | | |
| |
| Heat Exchanger Warranty (w/out Recirculation) | 5 Years | | |
| Heat Exchanger Warranty (w/Recirculation) | 5 Years | | |
| Parts Warranty | 5 Years | | |
| Labor Warranty | 1 Year | | |
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