Kepler 21-B Series 9,000 BTU Single-Zone Ductless Mini-Split Heat Pump – 208/230V

Kepler 21-B Series 9,000 BTU Single-Zone Ductless Mini-Split Heat Pump

The Kepler 21-B Series 9,000 BTU ductless mini-split heat pump is a single-zone heating and cooling system designed for year-round comfort in a room or designated living area. It includes a wall-mounted indoor air handler and a matching outdoor inverter heat pump unit.

With 21.7 SEER2 cooling efficiency, 12.6 EER2 and 9.4 HSPF2 (Region IV), this system combines variable-capacity inverter operation with efficient heating and cooling performance. Its rated cooling capacity is 9,000 BTU/h, while its rated heating capacity is 10,000 BTU/h at standard heating conditions.

Key Features and Benefits

• 9,000 BTU cooling capacity: Designed for single-zone cooling applications.
• 10,000 BTU rated heating capacity: Provides heating as well as cooling for year-round indoor comfort.
• 21.7 SEER2 efficiency: High seasonal cooling efficiency.
• 12.6 EER2: Rated energy efficiency under standard cooling conditions.
• 9.4 HSPF2 (Region IV): Seasonal heating efficiency rating.
• Variable-capacity inverter compressor: Continuously adjusts system output to respond to changing heating and cooling demand.
• Single-zone design: Includes one wall-mounted indoor unit paired with one outdoor unit.
• Wireless remote control: Allows convenient adjustment of system settings and operating modes.
• Quiet indoor operation: Indoor sound levels are rated from 20 to 37 dB(A), depending on fan speed.

High-Efficiency Heating and Cooling

The Kepler 21-B is rated at 9,000 BTU/h for cooling and 10,000 BTU/h for heating. Its variable-capacity inverter technology adjusts compressor output to suit the current demand, helping maintain more consistent indoor temperatures.

The system has a published cooling capacity range of 2,900 to 10,500 BTU/h and a heating capacity range of 2,400 to 10,500 BTU/h under the specified standard rating conditions.

Energy Efficiency

The system’s 21.7 SEER2 and 12.6 EER2 ratings describe its cooling efficiency, while its HSPF2 rating is 9.4 for Region IV and 7.2 for Region V. These ratings provide a standardized way to compare seasonal heating and cooling efficiency.

Comfort and Quiet Operation

The wall-mounted indoor unit delivers conditioned air directly into the selected space. Indoor sound pressure levels are rated at 20 dB(A) on low fan speed, 28 dB(A) on medium and 37 dB(A) on high, supporting quiet operation when used at lower fan settings.

Electrical and Installation Information

This model requires a 208/230V, single-phase, 60Hz electrical supply. The published voltage range is 187–253V. The indoor unit uses 1/4-inch liquid and 3/8-inch gas refrigerant connections. Refrigerant piping, electrical protection and installation clearances must follow the model-specific installation instructions and applicable electrical and building codes.

Technical Specifications

• Brand: Kepler
• Series: 21-B
• System type: Single-zone ductless mini-split heat pump
• Indoor model: IDUMSAG11A-09HRFN1-MT0W
• Outdoor model: ODUMOX230-09HFN1-MT0W
• Rated cooling capacity: 9,000 BTU/h
• Cooling capacity range: 2,900–10,500 BTU/h
• Rated heating capacity: 10,000 BTU/h
• Heating capacity range: 2,400–10,500 BTU/h
• SEER2: 21.7
• EER2: 12.6
• HSPF2: 9.4 Region IV / 7.2 Region V
• Rated cooling input: 715 W
• Rated heating input: 905 W
• Power supply: 208/230V, 1-phase, 60Hz
• Voltage range: 187–253V
• Refrigerant: R-410A
• Indoor sound level: 20–37 dB(A)
• Outdoor sound level: 54.5 dB(A)
• Indoor dimensions (W × D × H): 28.70 × 7.87 × 11.50 inches
• Indoor net weight: 17.64 lb
• Outdoor dimensions (W × D × H): 30.12 × 11.93 × 21.85 inches
• Outdoor net weight: 55.11 lb
• Refrigerant piping: 1/4-inch liquid / 3/8-inch gas
• AHRI reference: 214610352

Why Choose the Kepler 21-B Mini-Split?

The Kepler 21-B Series is a single-zone ductless heat pump option for homeowners looking for efficient heating and cooling in a compact wall-mounted system. Its inverter operation, 21.7 SEER2 rating, 9,000 BTU cooling capacity and 10,000 BTU heating capacity make it suitable for applications where a dedicated single-zone comfort solution is desired.