With more power than any tankless water heater in its class, the NR981 series is ideal for mid-size homes with up to 4 showers. Built-in features include safety lock-out, freeze protection, and high elevation adjustment. PVC CANNOT be used for venting.
These units offer several innovations:
- Safety lock out - Default max. 120 degrees (refer to owner's manual for higher temp)
- Dual flame burner - Noritz exclusive! Minimizes temperature fluctuations.
- Fully modulating - Automatically adjusts burner level accordingly.
- Turbo Flow - Up to 9.8 GPM @ 35 degree temperature rise (7.5 GPM @ 45 degree rise).
- Quick Connect - Doubles the output by connecting two identical heaters.
- 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.
- Commercial grade heat exchanger - 25% thicker piping than our competition.