Noritz RB-510 Recess Box For Nr50Od / Nr66Od / Nrc66Od / Nrc71Od ETL 5" inner diameter (four handles

5" inner diameter (four handles are midway up the sides of the spark guard

Kit is designed for 1

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for all NR981 Series models

Noritz RB-510 Recess Box For Nr50Od / Nr66Od / Nrc66Od / Nrc71Od ETL 5" inner diameter (four handlesNoritz RB‐ 510 Recess Box For NR50OD / NR66OD / NRC66OD / NRC71OD Increase the square footage in your home, and install your tankless water heater in an aesthetic and protective RB‐ 510 recess box. For outdoor installation only, the RB‐ 510 allows a ventilation free install, while essentially hiding the unit within your exterior wall. Compatible with the NR501‐ OD / NR662‐ OD / NRC661‐ OD /