Rinnai RCB Series 399,000 BTU Indoor Natural Gas Wall Mounted Commercial Condensing Solo Boiler - RCB399AN

  • SKU #: RINRCB399AN
  • MPN #: RCB399AN
MSRP: $18,767.00
$17,457.56
Special Order  Project Pricing
Condition:
New
Availability:
Special Order, expect 4-6 weeks for delivery, subject to change
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Rinnai 2026 New Year Rebate Promotion

Save $250 on RCB•SERIES™ Commercial Wall-Hung 301/399AN Boilers with Rinnai’s limited-time 2026 New Year Rebate Promotion.

Promotion valid through:
March 31, 2026
Rebate submission deadline:
April 15, 2026

All rebate submissions must include the eligible model serial number to qualify. For full rebate details and submission instructions, see the official Rinnai rebate information.

View Rebate Details

  • 97% Thermal Efficiency
  • 10:1 Turndown ratio
  • Stainless Steel Heat Exchanger (ASME H Stamp)
  • Ultra Low NOx
  • ASME H Stamp
  • Cascade up to 8 Units
  • Common Vent up to 4 Units
  • 7'' LCD Touch Screen
  • Wifi and BMS compatible
  • MAX BTU British Thermal Units equal the energy needed to raise one pound of water by one degree Fahrenheit. Capacity: 399,000 BU / (117 kW)
  • Fuel Type: Natural Gas
  • Voltage: AC 120 Volts, 60 Hz
  • Ignition Type: Direct Electronic Ignition
  • Venting Type: Twin Pipe
  • Energy Efficiency: 97.0%
  • Gas Connection: 1" MNPT
  • Water Connection: 1-1/4" MNPT
  • Condensate Connection: 1" MNPT
  • Recirculation Capable: No
  • Wifi Capable: Yes