- Brand: Rinnai®Domestic/Import: ImportTemperature Rating: 140 to 185 deg F
- Current production water heaters use the MC-91-2 and MCC-91-2 controllers (they replaced the MC-91-1 and MCC-91-1 controllers)
- MC-91-2/MCC-91-2 controllers are backwards compatible(any model that came with a MC-91-1/MCC-91-1 controller can use the MC-91-2/MCC-91-2 controller)
- The -2 controllers retain all functions found on the -1 controllers plus additional functions
- Expanded diagnostic functions (found previously only on the MC-100 controller) are now standard on the MC-91-2 and MCC-91-2 controllers
- Controller now has a locking function
- Rinnai® Standard Digital Temperature Controller, 140 to 185 deg F, Import