Mitsubishi SEZ-KD18NA4R1.TH 18,000 BTU Slim-Duct Concealed Ducted Indoor Unit

The Mitsubishi SEZ-KD18NA4R1.TH is an 18,000 BTU slim-duct concealed ducted indoor unit designed to deliver efficient, quiet heating and cooling while remaining completely hidden from view. Ideal for residential and light commercial applications, this low-profile unit installs above ceilings or in soffits to provide balanced comfort through short duct runs without impacting interior aesthetics. When paired with a compatible Mitsubishi outdoor unit, it offers reliable year-round heat pump performance with precise temperature control.

Engineered for flexibility and performance, the SEZ-KD18NA4R1.TH features adjustable external static pressure, a compact cabinet for tight installation spaces, and advanced control compatibility. Its efficient airflow and quiet operation make it well suited for bedrooms, offices, and living areas where discreet comfort delivery is preferred but ducted distribution is required.

Features

• Manufacturer: Mitsubishi Electric
• Part Number: SEZ-KD18NA4R1.TH
• Series: M-Series slim-duct concealed ducted
• Capacity: 18,000 BTU cooling with heat pump compatible heating
• Unit Type: Concealed slim-duct ducted indoor unit
• Installation: Low-profile design for ceiling or soffit installations
• Application: Ideal for residential or light commercial spaces requiring hidden ducted comfort
• Airflow: Multi-speed fan with adjustable external static pressure for short duct runs
• Operation: Quiet performance suitable for bedrooms, offices, and living areas
• Filtration: Built-in air filter to help maintain indoor air quality
• Controls: Compatible with Mitsubishi wired controllers, wireless interfaces, and kumo cloud WiFi control (with required adapter)
• Refrigerant: R-410A
• Electrical: 208/230V, single-phase, 60 Hz
• Compatibility: Designed for use with compatible Mitsubishi heat pump outdoor units
• Design: Compact cabinet allows installation in tight ceiling spaces while maintaining service accessibility

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