Fujitsu AMUH18KUAS & AOUH18KUAS1 is a 18,000 BTU R-32 multi-position ducted mini-split system offering quiet, efficient comfort. Ideal for up to 750 sq ft, it supports advanced controls, flexible airflow, and electric heat options. Perfect for retrofits and compact installs.

Unit Type: Single Zone
Product Line: KUAS Series
Operating Mode: Cooling & Heating
Low Ambient Heat: Yes
Number of Zones: 1
System Capacity: 18,000 BTU
Line Set Size: 1/4" x 1/2"
WiFi Enabled: Yes
WiFi Built In: No

Indoor Unit AMUH18KUAS
Outdoor Unit AOUH18KUAS1

Cooling Capacity up to 18,000 BTU
Heating Capacity up to 21,600 BTU
SEER2 19.2
EER2 12.2
HSPF2 10.5
Room Cooling/Heating Capacity up to 750 sq ft

INDOOR UNIT:
• Ducted Multi-Position Air Handling Unit ideal for retrofit and new construction applications
• Multi-position configuration: Up-flow, Left, Right, or Down-flow (requires optional Downflow kit)
• Low-noise design with sound levels as low as 33 dB(A)
• Built-in refrigerant leak detection sensor
• Multiple fan speed options; Auto, High, Med, Low, and Quiet
• Wide external static pressure (ESP) range: up to 0.8 inWG
• Special Operation modes available:
- Economy Mode/ Cold Air Prevention / Auto-restart function
• Enhanced control platform:
- Wireless control available via optional IR receiver and wireless remote (UTY-LBTUM)
- Optional Wi-Fi module enables remote access through the Airstage Mobile App
- Supports 24Vac third-party thermostat integration via compatible thermostat Interface
- BACnet and Modbus protocol compatibility for Building Management and Home
Automation systems
• Advanced scheduling and timer options with Weekly Timer / 24-hr Timer / Sleep Function
• Built-in I/O terminals support integration with third-party devices (e.g. fire alarms, door switches,
humidifiers, auxiliary heat, and ERV/HRV systems)
• Optional single and dual stage electric heater kits for additional heat capacity
• Emergency heat supported via optional heater kits or external third-party sources
• Auto backup heat activation (requires Heater Kit or third-party source)
• Ideal for installation in zero-clearance applications (e.g. mobile homes, manufactured homes)
• Low air leakage rate of less than 2%
• Compatible with Airzone third-party communicating zoning system
OUTDOOR UNIT:
• Low GWP R-32 systems for reduced environmental impact
• Common Outdoor Unit compatible with all non-wall-mounted indoor unit types
• INVERTER-driven compressor that offers superior performance, comfort, and energy savings
• Delivers more than 103% cooling capacity at 0°F (-17.8°C)
• Up to 20% higher rated heating capacity than nominal capacity
• Compact outdoor unit with extended line set length up to 98ft (30m)
• Provides low ambient cooling and heating down to -5°F (-20°C) for dependable performance in
extreme conditions

Airflow Cooling CFM: 371-430-494-600
Airflow Heating CFM: 371-430-494-600
Noise Level dB(A), Cooling: 33-36-39-44
Noise Level dB(A), Heating: 33-36-39-43
Size W x D x H: 43" x 17-1/2" x 21"
Weight: 107 lbs

Noise Level Cooling: 52 dB(A)
Noise Level Heating: 55 dB(A)
Size W x D x H: 24-7/8" x 31-7/16" x 11-7/16"
Weight: 84 lbs
Electrical: 208/230V
Max Line Set Length: 98 ft
Max Height Difference: 49 ft