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Noritz NR71-SV 66W Freeze Tankless Water Heater with Standard Vent

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This item is either discontinued or no longer available.

Noritz NR71-SV Details
Noritz 66W Freeze Tankless Water Heater with Standard Vent

The NR71-SV Series Residential Tankless Water Heater is perfect for homes with 1-3 showers. Noritz NR71-SV-LP delivers up to 7.1 GPM @ 35 degree temperature rise and 6.3 GPM @ 45 degree rise. When properly sized, this heater provide an endless supply of hot water to an entire home. With state-of-the-art gas combustion technology, Noritz burners maximize output and provide temperature stability while maintaining low emissions. This unit can be used as indoor or outdoor heater and vented horizontally or vertically.


  • Safety Devices: Flame Rod, Thermal Fuse, Lightning Protection Device (ZNR), Overheat Prevention Device, Freezing Prevention Device, Fan Rotation Detector
  • Safety lock out - Default max. 120 degrees (refer to owner's manual for higher temp)
  • Standard burner - High performance single flame burner
  • Fully modulating burner - Automatically adjusts burner level accordingly
  • Turbo Flow - Up to 7.1 GPM @ 35 degree temperature rise (6.3 GPM @ 45 degree rise)
  • Direct ignition - No standby pilot light
  • Thermal fuse - Automatic overheat protection system
  • Resin coated PC board - Increases durability and protection from elements
  • Automatic air regulator - Monitors internal temperature / maximizes burner efficiency
  • Resin coated PC board - Increases durability and protection from elements
  • Self-diagnostic onboard computer system
  • Back-up battery compatible
  • Recirculation compatible
  • Qualifies For Up To $1,500 Tax Credit (2009-2010 only)
  • WARNING!!! PVC cannot be used for venting. Use only Category III (4" stainless steel venting)


  • Isolation valves (IK-WV-4)
  • Outdoor vent cap (VC-4-1) for NR71-SV-LP
  • Pipe cover (PC-1S)
  • Remote controller (RC-7649M; for Canada RC-7650M)
  • Remote controller cord (10': RC-CORD10; 26': RC-CORD26)
  • Remote controller outdoor junction box (RC-OJB)
  • Scale Shield (SS-HB-1)
NR71-SV Specifications

Air Supply/Exhaust Type: Power Vented
Capacity Range: 0.5-7.1 Gal./min
Casing Materials: Zincified Steel Plate/Polyester Coating
Color: White
Consumption: 66W Freeze Prevention 141W
Default Temperature Options (Deg): 120, 130, 140 F (Original is 120 F)
Depth: 6-5/7
Energy Star Compliant: Yes
Flue Collar Materials: Stainless Steel
Fuel Type: Liquid Propane, Natural Gas
Gas Inlet: 3/4"
Heat Exchanger Materials: Copper Sheeting, Copper Tubing
Height: 23-3/5
Hot Water Outlet: 3/4"
Ignition: Direct Ignition
Installation Type: Indoor/ Outdoor, Wall Mounted
Max Gas Consumption: 180,000 BTU/Hr
Maximum Hot Water Capacity: 45 degree F Rise, 6.3 Gal./min.
Min Gas Consumption: 25,000 BTU/Hr
Minimum Flow Rate: 0.5 GPM
Operating Pressure: 15-150 psi
Supply: 120 VAC (60Hz)
Temperature Settings (Deg): 100-150 F (In 5 F intervals), 160 F (12 Options)
Thermal Efficiency: 83%
Water Holding Capacity: 0.2 Gallon
Water Inlet: 3/4"
Weight: 41
Width: 13-4/5

NR71-SV is listed under the following SKUs

Liquid Propane
Natural Gas

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Noritz NR71-SV Reviews


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Noritz66W Freeze Tankless Water Heater with Standard Vent

(based on 1 review)

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Reviewed by 1 customer

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Bad surprise!

By Em

from San Diego, CA

About Me Homeowner

Verified Buyer


  • Energy Efficient


  • Tough To Install

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  • Home

Comments about Noritz 66W Freeze Tankless Water Heater with Standard Vent:

I thought I found a deal, only to discover that 2 more parts were required to complete the install. I didn't save any money. Although it is much noisier than expected (we have it in the house), it takes up so much less space than our 50 gallon tank heater that it's worth it.

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Noritz NR71-SV Questions and Answers