Fujitsu AUUH36KUAS & AOUH36KUBS1: 36,000 BTU AIRSTAGE Centauri Circular-Flow Ceiling Cassette Heat Pump System

The Fujitsu AUUH36KUAS paired with the AOUH36KUBS1 outdoor unit is designed to deliver powerful heating and cooling performance in a high-efficiency 36,000 BTU-class single-zone mini-split system. Part of Fujitsu's AIRSTAGE Centauri series , this advanced heat pump system combines a discreet ceiling-mounted circular-flow cassette indoor unit with INVERTER-driven technology for dependable year-round comfort. The original system configuration provides rated heating operation in outdoor temperatures as low as -5°F. Featuring optional Wi-Fi connectivity, advanced airflow distribution, ultra-quiet operation, and environmentally friendly R-32 refrigerant, this system offers exceptional comfort, energy efficiency, and installation flexibility for residential and light commercial applications.

General Information

System Type: Circular-flow ceiling cassette indoor unit + single-zone heat pump outdoor unit

Models: Indoor – AUUH36KUAS | Outdoor – AOUH36KUBS1

Product Series: Fujitsu AIRSTAGE Centauri

Capacities: 36,000 BTU Rated Cooling (Max 39,000) | 38,000 BTU Rated Heating (Max 43,000)

Operating Modes: Heating & Cooling with automatic operation, economy mode, powerful mode, minimum heat mode, and automatic defrosting

ENERGY STAR®: ENERGY STAR Cold Climate Certified and Most Efficient (original outdoor unit pairing)

Refrigerant / Factory Charge: R-32, 4 lb 7 oz (original outdoor unit specification)

AHRI Reference Number: 215434555 (original AOUH36KUAS1 pairing; updated pairing requires verification)

Key Features

Advanced Circular-Flow Cassette Design: Ceiling-mounted cassette distributes conditioned air throughout the room, helping maintain balanced temperatures and consistent comfort while minimizing visible wall-mounted equipment.

Cold-Climate Heating Performance: The original system configuration provides rated heating operation in outdoor temperatures as low as -5°F, making it a practical solution for homes and commercial spaces in colder climates.

Exceptional Heating Capacity: Delivers 38,000 BTU rated heating capacity with a maximum output of 43,000 BTU, providing approximately 5.6% higher rated heating capacity than its nominal 36,000 BTU classification.

Cold-Weather Heating Capacity: Provides 25,400 BTU rated heating capacity at 17°F, with a maximum output of 34,500 BTU, and delivers 31,000 BTU rated heating capacity at 5°F under manufacturer-specified test conditions.

Advanced INVERTER Technology: Continuously adjusts compressor output to match heating and cooling demands, maximizing efficiency while maintaining consistent indoor temperatures.

Outstanding Energy Efficiency: The original system achieves an impressive 21.3 SEER2, 11.2 EER2, and 10.5 HSPF2 (Region IV), helping reduce energy consumption and operating costs.

Ultra-Quiet Indoor Operation: Indoor sound levels as low as 34 dB(A) in Quiet Mode provide peaceful comfort for living rooms, offices, commercial spaces, and other occupied areas.

Optional Wi-Fi Connectivity: Compatible with an optional Wi-Fi adapter for convenient remote monitoring and temperature adjustments through the Fujitsu AIRSTAGE Mobile App.

Optional Intelligent Occupancy Sensor: Compatible with an optional human sensor kit that detects room occupancy to help optimize energy savings and minimize unnecessary heating and cooling.

Multiple Fan Speed Options: Auto, High, Medium, Low, and Quiet settings provide customizable airflow and comfort for different room conditions.

Built-In Condensate Drain Pump: Integrated drain pump supports efficient condensate removal, providing additional installation flexibility and simplifying moisture management.

ProCore™ Corrosion-Resistant Indoor Coil: Features high-corrosion-resistant copper coils designed to improve durability and long-term reliability.

Blue Fin Outdoor Coil Protection: The original outdoor unit features a corrosion-resistant Blue Fin-coated heat exchanger designed to protect against environmental exposure and support extended coil life.

Flexible Cassette Grille Options: Compatible with optional white or black cassette grilles, allowing the indoor unit to complement different ceiling designs and interior finishes.

Optional Fresh Air Integration: Supports a compatible fresh air intake kit to introduce outside air and enhance indoor air quality and comfort.

Enhanced Comfort Controls: Supports optional wired and wireless remote controllers, weekly timer, 24-hour timer, sleep function, economy mode, powerful mode, automatic defrosting, and auto-restart functionality.

Smart Home & Building Integration: Supports compatible wired controllers, third-party thermostat interfaces, BACnet, Modbus, and home automation systems through optional accessories.

Auxiliary Heating Integration: Built-in external input/output functionality and multiple auxiliary heat control options allow integration with compatible supplemental heating systems and third-party devices.

Group Control Capability: Supports coordinated control of multiple compatible indoor units, providing convenient temperature management for larger residential and commercial installations.

Flexible Refrigerant Piping: The original system configuration supports refrigerant piping lengths up to 164 feet and maximum height differences of 98 feet, providing installation flexibility for residential and light commercial applications.

Advanced External Device Integration: Supports compatible connections for fire alarms, door switches, humidifiers, auxiliary heating systems, and other third-party devices.

Specifications (Rated Conditions)

Cooling Capacity: 36,000 BTU Rated | 39,000 BTU Max | 9,600 BTU Min | SEER2: 21.3 | EER2: 11.2

Heating Capacity: 38,000 BTU Rated | 43,000 BTU Max | 9,200 BTU Min | COP2: 3.94

Cold-Weather Heating at 17°F: 25,400 BTU Rated | 34,500 BTU Max

Cold-Weather Heating at 5°F: 31,000 BTU Rated

HSPF2: 10.5 (Region IV) | 8.2 (Region V)

Electrical: 208/230 V, 1-Ph, 60 Hz | MCA: 20.8 A | Maximum Circuit Breaker: 25 A

Maximum Operating Current: 20.8 A Cooling | 20.8 A Heating

Indoor Airflow (Cooling): 695–1,118 CFM

Indoor Airflow (Heating): 695–1,118 CFM

Outdoor Airflow: 2,502 CFM Cooling | 2,431 CFM Heating

Indoor Sound Pressure: 34–45 dB(A) Cooling | 34–45 dB(A) Heating

Outdoor Sound Pressure: 57 dB(A) Cooling | 59 dB(A) Heating

Refrigerant: R-32 | Factory Charge: 4 lb 7 oz | Additional Refrigerant: 0.43 oz/ft

Piping: Liquid 3/8 in. | Gas 5/8 in. | Minimum Line Length: 16 ft | Maximum Line Length: 164 ft | Maximum Height Difference: 98 ft

Factory Pre-Charged Line Length: 66 ft

Outdoor Dimensions / Weight: 39-5/16 × 37 × 12-5/8 in. (H × W × D) | 137 lb

Indoor Dimensions / Weight: 11-5/16 × 33-1/16 × 33-1/16 in. (H × W × D) | 57 lb

Moisture Removal: 7.8 pints/hour

Drain Hose Connection: 13/16 in. I.D. | 1-1/16 in. O.D.

Outdoor Cooling Operating Range: -5°F to 122°F

Outdoor Heating Operating Range: -5°F to 75°F

Indoor Cooling Operating Range: 64°F to 90°F

Indoor Heating Operating Range: 60°F to 86°F

Included Components

Indoor Unit: AUUH36KUAS – 36,000 BTU-class AIRSTAGE Centauri circular-flow ceiling cassette indoor air handler featuring ProCore™ corrosion-resistant copper coils, built-in condensate drain pump, multiple fan speed options, ultra-quiet operation, and compatibility with optional Wi-Fi connectivity and occupancy sensing.

Outdoor Unit: AOUH36KUBS1 – Updated 36,000 BTU-class outdoor heat pump condenser specified for this system listing. Model-specific efficiency ratings, operating limits, refrigerant charge, corrosion protection, and installation requirements require confirmation from the updated manufacturer's submittal.

Cassette Grille: Compatible white (UTG-LCGVCW) and black (UTG-LCGVCB) grille options are available separately.

Remote Controller: Compatible wired controllers and an optional IR receiver kit with wireless remote controller (UTY-LBTUC) are available separately for convenient temperature, fan speed, and operating mode adjustments.

Ideal For

Homeowners and HVAC contractors seeking a premium, high-efficiency ceiling cassette mini-split heat pump capable of delivering powerful heating and cooling while maintaining a clean, unobtrusive interior appearance. The Fujitsu AUUH36KUAS and AOUH36KUBS1 combination is intended for applications such as spacious living rooms, open-concept areas, offices, retail environments, commercial spaces, additions, and other residential or light commercial areas requiring efficient temperature control and balanced airflow distribution.

With its advanced circular-flow ceiling cassette design, INVERTER-driven technology, whisper-quiet indoor operation, optional Wi-Fi connectivity, optional intelligent occupancy sensing, built-in condensate drain pump, and ProCore™ corrosion-resistant indoor coil , the AIRSTAGE Centauri system offers an excellent combination of comfort, energy efficiency, installation flexibility, and long-term reliability for year-round residential and light commercial heating and cooling.