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Previous Name : NCC1991-DV-LP
Residential or Commercial Commercial
Installation Location Indoor Only
Exhaust Type 2-pipe Direct Vent (SV convertible)
Max Flow Rate 11.1 GPM
Flow Rate @ 50°F Rise 7.4
Flow Rate @ 80°F Rise 4.7
Temperature Range 100-185°F
Production Status Discontinued
Condensing Yes
Minimum Activation Flow Rate 0.5 GPM
Water Quality Treatment may be needed
Freeze Protection Yes
Freeze Protection Rating - Indoor Temp -30°F
Freeze Protection Rating - Outdoor Temp N/A
Recirculation Compatible? Yes
New Generation Model Number Yes
Previous Name NCC1991-DV-LP
Available Temperature Settings (with remote) 100, 105, 110, 115, 120, 125, 130, 135, 140, 145, 150, 160, 170, 185°F
Default Temperature Setting (without remote) 120°F
Default Temperature Program Setting Options (without remote) 120, 130, 140, 185°F
Production Date Range 03/2016 - Present
Min Gas Input (Btu) 16000
Max Gas Input (Btu) 199900
Height (in) 24.4
Width (in) 18.4
Depth (in) 9.4
Weight (lbs) 68
Thermal Efficiency 94%
Energy Factor
Afue N/A
Quick-Connect Compatible? Yes
Cold Water Connection Size (in) 3/4
Hot Water Connection Size (in) 3/4
Gas Connection Size (in) 3/4
Power Supply 120 VAC
Current Draw (A) 2.55
Exhaust Vent Diameter Requirements 3" or 4"
Exhaust Vent Material Requirements PVC or CPVC
Max Vent Length with 1 elbow 57’ with 4" or 28’ with 3"
Vent Termination Clearances to Any Building Opening (ft) Below = 1’, Side = 1’, or Above = 1’
Gas Supply Pressure Range 8-14" WC
Min Gas Line Size 3/4" up to 30’
Water Pressure Rating (psi) 15-150
Case Clearances (in) Top = 12", Front = 4", Sides = 2", Back = 0"
Combustion Air Requirements - using Indoor Air 199 in² (Only if SV conversion)
Combustion Air Requirements - using Outdoor Air 100 in²(Only if SV conversion)
Head Loss at 2 gpm
Cold Connection Height 2.2"
Power Consumption w/out Freeze Prevention 83 Watts
Power Consumption w/Freeze Prevention 223 Watts
Flow Meter Alarm Yes
Service Reminder No
Condensate Handling Method? NC-1 or NT20A
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 Stainless Steel Casing
Color/Finish Stainless Steel
Flue Collar Material PVC
Primary Heat Exchanger Material Copper
Secondary Heat Exchanger Material Stainless Steel
Mounting Type Wall Hung
Package Contents Anchoring Screws, Remote Controller, Remote Controller Cord, Owner’s Guide, Warranty, Installation Manual, Drain hose(with clamp)
Water Holding Capacity 0.5 gal
Keypad/Thermostat Display Included
Compatible Remote Controller Part # RC-9018M
Isolator Valve Part # IK-WV-200-1-XX
Freeze Protection Yes
Freeze Protection Kit Accessory
Outdoor Vent Cap Part # N/A
Pipe Cover Part # PC-3S-SUS
Recess Box Part # N/A
High Elevation Adjustment Yes
Quick-Connect Cord Part # QC-2
System Controller Compatible? Yes
System Controller Part # SC-301-6M, SCU-301-12M
Remote Controller Cord Included
Compatible Remote Controller Cord Part # RC-CORD10
Power Cord Included attached
ENERGY STAR® Qualified Yes
CSA Yes
Mobile Home Yes
NSF Yes
SCAQMD (20 ppm) Yes
SCAQMD (55 ppm) No
UPC No
Energy Guide - Est. Yearly Energy Use 205 gallons
Energy Guide - Est. Yearly Operating Cost $494
UPC Low Lead Yes
ASME (HLW) No
ASME (H) No
ASME (NB) No
Heat Exchanger Warranty (w/out Recirculation) 5 years
Heat Exchanger Warranty (w/Recirculation) 5 years
Parts Warranty 5 years
Labor Warranty 1 year
Go to Warranty Calculator
Residential or Commercial Commercial
Installation Location Indoor Only
Exhaust Type 2-pipe Direct Vent (SV convertible)
Max Flow Rate 11.1 GPM
Flow Rate @ 50°F Rise 7.4
Flow Rate @ 80°F Rise 4.7
Temperature Range 100-185°F
Production Status Discontinued
Condensing Yes
Minimum Activation Flow Rate 0.5 GPM
Water Quality Treatment may be needed
Freeze Protection Yes
Freeze Protection Rating - Indoor Temp -30°F
Freeze Protection Rating - Outdoor Temp N/A
Recirculation Compatible? Yes
New Generation Model Number Yes
Previous Name NCC1991-DV-LP
Available Temperature Settings (with remote) 100, 105, 110, 115, 120, 125, 130, 135, 140, 145, 150, 160, 170, 185°F
Default Temperature Setting (without remote) 120°F
Default Temperature Program Setting Options (without remote) 120, 130, 140, 185°F
Production Date Range 03/2016 - Present
Min Gas Input (Btu) 16000
Max Gas Input (Btu) 199900
Height (in) 24.4
Width (in) 18.4
Depth (in) 9.4
Weight (lbs) 68
Thermal Efficiency 94%
Energy Factor
Afue N/A
Quick-Connect Compatible? Yes
Cold Water Connection Size (in) 3/4
Hot Water Connection Size (in) 3/4
Gas Connection Size (in) 3/4
Power Supply 120 VAC
Current Draw (A) 2.55
Exhaust Vent Diameter Requirements 3" or 4"
Exhaust Vent Material Requirements PVC or CPVC
Max Vent Length with 1 elbow 57’ with 4" or 28’ with 3"
Vent Termination Clearances to Any Building Opening (ft) Below = 1’, Side = 1’, or Above = 1’
Gas Supply Pressure Range 8-14" WC
Min Gas Line Size 3/4" up to 30’
Water Pressure Rating (psi) 15-150
Case Clearances (in) Top = 12", Front = 4", Sides = 2", Back = 0"
Combustion Air Requirements - using Indoor Air 199 in² (Only if SV conversion)
Combustion Air Requirements - using Outdoor Air 100 in²(Only if SV conversion)
Head Loss at 2 gpm
Cold Connection Height 2.2"
Power Consumption w/out Freeze Prevention 83 Watts
Power Consumption w/Freeze Prevention 223 Watts
Flow Meter Alarm Yes
Service Reminder No
Condensate Handling Method? NC-1 or NT20A
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 Stainless Steel Casing
Color/Finish Stainless Steel
Flue Collar Material PVC
Primary Heat Exchanger Material Copper
Secondary Heat Exchanger Material Stainless Steel
Mounting Type Wall Hung
Package Contents Anchoring Screws, Remote Controller, Remote Controller Cord, Owner’s Guide, Warranty, Installation Manual, Drain hose(with clamp)
Water Holding Capacity 0.5 gal
Keypad/Thermostat Display Included
Compatible Remote Controller Part # RC-9018M
Isolator Valve Part # IK-WV-200-1-XX
Freeze Protection Yes
Freeze Protection Kit Accessory
Outdoor Vent Cap Part # N/A
Pipe Cover Part # PC-3S-SUS
Recess Box Part # N/A
High Elevation Adjustment Yes
Quick-Connect Cord Part # QC-2
System Controller Compatible? Yes
System Controller Part # SC-301-6M, SCU-301-12M
Remote Controller Cord Included
Compatible Remote Controller Cord Part # RC-CORD10
Power Cord Included attached
ENERGY STAR® Qualified Yes
CSA Yes
Mobile Home Yes
NSF Yes
SCAQMD (20 ppm) Yes
SCAQMD (55 ppm) No
UPC No
Energy Guide - Est. Yearly Energy Use 205 gallons
Energy Guide - Est. Yearly Operating Cost $494
UPC Low Lead Yes
ASME (HLW) No
ASME (H) No
ASME (NB) No
Heat Exchanger Warranty (w/out Recirculation) 5 years
Heat Exchanger Warranty (w/Recirculation) 5 years
Parts Warranty 5 years
Labor Warranty 1 year
Go to Warranty Calculator
ENERGYSTAR CSA NSF SCAQMD20 LeadFree

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