Fujitsu ARUH36KUAS & AOUH36KUAH1: 36,000 BTU AIRSTAGE Centauri XLTH Cold Climate Mid-Static Ducted Heat Pump System

The Fujitsu ARUH36KUAS paired with the AOUH36KUAH1 outdoor unit delivers exceptional heating and cooling performance in a high-efficiency 36,000 BTU single-zone ducted mini-split system. Part of Fujitsu's AIRSTAGE Centauri XLTH series , this advanced cold-climate heat pump combines a concealed mid-static ducted indoor air handler with INVERTER-driven technology for dependable year-round comfort—even in extreme winter conditions as low as -15°F. Featuring optional Wi-Fi connectivity, flexible ducted installation, whisper-quiet operation, and environmentally friendly R-32 refrigerant, this system provides outstanding efficiency, installation versatility, and consistent comfort for residential and light commercial applications.

General Information

System Type: Mid-static ducted indoor air handler + XLTH cold-climate single-zone heat pump outdoor unit

Models: Indoor – ARUH36KUAS | Outdoor – AOUH36KUAH1

Product Series: Fujitsu AIRSTAGE Centauri XLTH

System Name: 36KUAH1R

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

Operating Modes: Heating & Cooling with economy mode, energy-saving mode, powerful mode, minimum heat mode, automatic defrosting, and auto-restart functionality

ENERGY STAR®: Yes – ENERGY STAR Certified, Cold Climate Certified, and Most Efficient

Refrigerant / Factory Charge: R-32, 5 lb 15 oz

AHRI Reference Number: 217895713

Key Features

XLTH Extreme Cold-Climate Heating: Provides reliable heating performance in outdoor temperatures as low as -15°F, making it an excellent solution for homes and commercial spaces in harsh winter climates.

Exceptional Heating Capacity: Delivers 38,000 BTU rated heating capacity with a maximum output of 43,000 BTU at 47°F outdoor temperature, providing powerful heating performance for residential and light commercial spaces.

Cold-Weather Capacity Retention: Engineered to deliver more than 100% of nominal heating capacity at 0°F and approximately 80% at -15°F, helping maintain dependable comfort during extreme winter conditions.

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

Outstanding Energy Efficiency: Achieves 18.0 SEER2, 11.4 EER2, and 10.0 HSPF2 (Region IV), helping reduce energy consumption and operating costs.

Concealed Mid-Static Ducted Design: Designed for installation above ceilings or within concealed spaces, distributing conditioned air through ductwork while maintaining a clean, unobtrusive appearance.

Flexible External Static Pressure: Supports external static pressure up to 0.8 in. WG, providing flexibility for ducted installations requiring adaptable airflow performance.

Automatic Static Pressure Detection: Automatically detects static pressure conditions to help optimize airflow delivery and system efficiency.

Ultra-Quiet Indoor Operation: Indoor sound levels as low as 26 dB(A) in Quiet Mode provide peaceful comfort for bedrooms, living areas, offices, and other occupied spaces.

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

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

Built-In Base Pan Heater: Helps prevent ice accumulation during extreme cold weather and supports reliable outdoor unit operation in winter conditions.

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

Blue Fin Outdoor Coil Protection: Corrosion-resistant coating protects the outdoor heat exchanger against environmental exposure and supports extended equipment life.

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

Flexible Air Intake Configuration: Supports side or bottom return-air intake configurations to accommodate different installation requirements and available spaces.

Built-In Refrigerant Leak Detection Sensor: Integrated refrigerant leak detection sensor enhances safety and reliability when operating with R-32 refrigerant.

Airzone Zoning Compatibility: Supports compatible Airzone third-party communicating zoning systems for advanced temperature management and improved comfort across multiple areas.

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.

Extended Refrigerant Piping: Supports refrigerant piping lengths up to 246 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.

Service Monitoring Capability: Compatible with Fujitsu UTY-RVRU and UTY-RNRUZ-series controllers for enhanced service monitoring and system management.

Low Ambient Cooling Performance: Supports cooling operation in outdoor temperatures as low as -5°F, providing additional flexibility for applications requiring cooling during colder weather.

Specifications (Rated Conditions)

Cooling Capacity: 36,000 BTU Rated | 39,000 BTU Max | 9,600 BTU Min | SEER2: 18.0 | EER2: 11.4

Heating Capacity: 38,000 BTU Rated | 43,000 BTU Max | 9,200 BTU Min | COP2: 3.8

Cold-Weather Heating at 17°F: 25,200 BTU Rated | 40,900 BTU Max

Cold-Weather Heating at 5°F: 40,000 BTU Rated | 40,000 BTU Max

Extreme Cold-Weather Heating: Rated operating range down to -15°F | Manufacturer states approximately 80% nominal heating capacity retention at -15°F

HSPF2: 10.0 (Region IV) | 8.0 (Region V)

Electrical: 208/230 V, 1-Ph, 60 Hz | MCA: 33.9 A | Maximum Circuit Breaker: 35 A

Rated Operating Current: 13.9 A Cooling | 12.9 A Heating

Maximum Operating Current: 21.0 A Cooling | 28.0 A Heating

Rated Input Power: 3.16 kW Cooling | 2.93 kW Heating

External Static Pressure: Up to 0.8 in. WG

Indoor Airflow (Cooling): 630–1,207 CFM

Indoor Airflow (Heating): 630–1,207 CFM

Indoor Fan Speeds: High: 1,207 CFM | Medium: 965 CFM | Low: 783 CFM | Quiet: 630 CFM

Outdoor Airflow: 2,266 CFM Cooling | 2,148 CFM Heating

Indoor Sound Pressure: 26–37 dB(A) Cooling | 26–37 dB(A) Heating

Outdoor Sound Pressure: 53 dB(A) Cooling | 53 dB(A) Heating

Refrigerant: R-32 | Factory Charge: 5 lb 15 oz | Additional Refrigerant: 0.43 oz/ft

Piping: Liquid 3/8 in. | Gas 5/8 in. | Minimum Line Length: 17 ft | Maximum Line Length: 246 ft | Maximum Height Difference: 98 ft

Factory Pre-Charged Line Length: 98 ft

Outdoor Dimensions / Weight: 39-5/16 × 37 × 12-5/8 in. (H × W × D) | 159 lb

Indoor Dimensions / Weight: 11-13/16 × 55-1/8 × 27-9/16 in. (H × W × D) | 121 lb

Moisture Removal: 7.6 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: -15°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: ARUH36KUAS – 36,000 BTU AIRSTAGE Centauri XLTH mid-static ducted indoor air handler featuring ProCore™ corrosion-resistant copper coils, built-in condensate drain pump, automatic static pressure detection, flexible side or bottom air intake, integrated refrigerant leak detection sensor, and compatibility with optional Wi-Fi connectivity.

Outdoor Unit: AOUH36KUAH1 – 36,000 BTU-class AIRSTAGE Centauri XLTH cold-climate heat pump condenser featuring INVERTER-driven technology, R-32 refrigerant, built-in base pan heater, Blue Fin corrosion protection, and heating operation down to -15°F.

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

Optional Wi-Fi Adapter: UTY-TFSXJ4 – Compatible Wi-Fi interface module available separately for remote system control through the Fujitsu AIRSTAGE Mobile App.

Optional 24V Thermostat Interface: UTY-TTRXZ1 – Compatible thermostat interface available separately for integration with supported conventional 24V thermostats. This interface cannot be used simultaneously with other control types specified as incompatible by Fujitsu.

Optional Remote Temperature Sensor: UTY-XSZXZ1 – Compatible remote temperature sensor available separately for additional temperature-sensing flexibility.

Optional Long-Life Filter: UTD-LFNA – Compatible long-life filter accessory available separately to support air filtration and routine maintenance.

Ideal For

Homeowners and HVAC contractors seeking a premium, high-efficiency concealed ducted mini-split heat pump capable of delivering dependable heating and cooling in challenging climates. The Fujitsu ARUH36KUAS and AOUH36KUAH1 combination is especially well suited for residential renovations, new construction, multi-room ducted applications, offices, additions, and light commercial spaces requiring precise temperature control, flexible ductwork configurations, and powerful cold-weather heating.

With its 18.0 SEER2 efficiency rating, heating operation down to -15°F, more than 100% nominal heating capacity at 0°F, optional Wi-Fi connectivity, whisper-quiet performance, built-in condensate drain pump, automatic static pressure detection, refrigerant leak detection sensor, and advanced corrosion protection , the AIRSTAGE Centauri XLTH system provides an excellent combination of comfort, energy efficiency, cold-climate performance, and long-term reliability for year-round residential and light commercial heating and cooling.