NORITZ® OUTDOOR NATURAL GAS TANKLESS WATER HEATER, 120,000 BTU, 5.0 GPMOur NR50 outdoor model is our newest and most affordable model for apartments, condominiums and townhouses with 1-2 showers. This compact model is perfect in the southeastern region of the USA ^^Features|Outdoor model- no venting required|Optional Freezing protection kit (sold separately)|0.5 GPM min. flow activation - capable of handling higher incoming water temperature than current residential series|1/2" Gas fitting- no need to upgrade gas line if pipe length is less than 20' (Natural Gas) from meter or 40' (Propane) from gas tank|Safety lock out - Default max. 120° (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 5.0 GPM @ 30° temperature rise (4.2 GPM @ 45° 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