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Browse Products18,000 BTU Mitsubishi 25.5 SEER2 R-454B Inverter Heat Pump Ductless Mini-Split System
$4,426.11
-
- Free shipping — most items ship by the next day
Licensed HVAC technician required. Must be installed by a certified professional. Improper installation voids the manufacturer warranty.
Licensed HVAC technician required. Must be installed by a certified professional. Improper installation voids the manufacturer warranty.
- Free shipping — most items ship by the next day
$4,426.11
-
- Free shipping — most items ship by the next day
18,000 BTU Mitsubishi 25.5 SEER2 R-454B Inverter Heat Pump Ductless Mini-Split System

The Mitsubishi MSZ‑FX18NL & MUZ‑FX18NLHZ deliver efficient 18,000 BTU heating and cooling for rooms up to 750 sq ft. Featuring Hyper‑Heat technology, built-in Wi-Fi, and quiet operation, this ductless system ensures reliable, year-round comfort with smart control.
INDOOR UNIT FEATURES
– 3D i-see Sensor (Built-in): The advanced sensor scans each room to produce a complete thermal profile that includes heat signatures based upon size, temperature and movement, then adjusts temperature and airflow based on user preference, and saves energy according to room occupancy.
– Dual Barrier Coating: The patented Dual Barrier Coating reduces the collection of contaminants like dust, fibers, smoke, and oil on the inner surface of the heat pump, resulting in optimal airflow and easier maintenance.
– Dual Barrier Fusion: The patented Dual Barrier Fusion reduces the collection of contaminants like dust, fibers, smoke, and oil on the vanes of the indoor unit, keeping it clean all year long. Dual Barrier Fusion’s shielding power is fused directly into the material of the horizontal and vertical vanes during manufacturing to maintain effectiveness and longevity of the components, and to promote vane cleanliness and reduce odors.
– Dual Vane: Dual-Vane feature allows for airflow direction to be set independently using two vanes, which can then deliver airflow across wide areas of a room, levels of a zone, or to two people in different locations at the same time.
– Econo Cool: Econo Cool temporarily and automatically adjusts the airflow based on heat exchanger temperature. The set temperature is increased slightly, which saves energy, while maintaining comfort.
– Multiple control options including: Back-lit screen hand-held Remote Controller (provided with unit), comfort app, third-party interfaces and both wired and wireless controllers
– Multiple fan speed options: Low, Medium, High, Powerful, Auto
– Powerful Mode: Temporarily drops or raises the set point and fan speed in order to quickly bring the room to the desired temperature.
– Quiet operation: Outdoor units are as quiet as a typical conversation, and most indoor units are whisper quiet.
– Slim Design: Slim wall-mounted indoor units provide zone comfort control
– Smart Dry +: The Smart Dry+ mode intelligently provides precise humidity control with minimal over-cooling of the space.
– Triple Action Filtration: Standard Microparticle and Electrostatic Enzyme Filters, along with an optional Carbon-based Deodorizing Filter. It effectively removes non-living particulate matter like dust and smoke, utilizes nanotechnology to absorb and neutralize odors, and employs static electricity to attract and filter charged airborne particles.
– Wi-Fi enabled units pair with the Comfort app for complete control over temperature, fan speeds, modes, schedules, and more.
OUTDOOR UNIT FEATURES
– Blue Fin Coating: An anti-corrosion treatment applied to the aluminum fins of the heat exchanger of the outdoor unit protects against corrosion caused by salt, sulfur, and other airborne contaminants in coastal and industrial areas
– H2i sumo Hyper-Heating INVERTER: 100% heating capacity at outdoor temperatures -10° F with guaranteed operation down to -22° F
– Hot-start technology: The fan only blows air when the heat exchanger has warmed, preventing blasts of cold air at start-up
SPECIFICATIONS
Outdoor Unit Dimensions: H40.58” x W16.55″ x D38.61″
Indoor Unit Dimensions: H13” x W15.76” x D43.34”
Volts: 208/230
Phase: 1
Hertz: 60
EER2: 13.05
HSPF2: 11.1
Liquid Line Valve Connection: 1/4″ outside diameter
Suction Line Valve Connection: 1/2″ outside diameter
- Hyper-Heat Technology — reliable heating in cold weather
- 25.5 SEER2 Efficiency — 18,000 BTU for rooms up to 750 sq. ft.
- Built-In Wi-Fi — control from your phone
- Quiet Ductless Comfort — Mitsubishi FX series with R-454B
Genuine OEM parts
Easy online ordering
30-day hassle-free returns
Help when you need it
What buyers are saying
Verified reviews from customers who purchased this product.
I’m absolutely thrilled with the 18,000 BTU Mitsubishi 21 SEER R-410A Heat Pump Ductless Mini-Split System! The unbeatable price for such exceptional performance has made a huge difference in my home, providing efficient, quiet, and powerful heating and cooling all year round.
The 18,000 BTU Mitsubishi mini-split system is a true powerhouse, delivering exceptional performance with its impressive 21 SEER efficiency. It cools and heats with precision, all at a price that makes it a steal for the quality and features it offers.
I recently invested in the 18,000 BTU Mitsubishi 21 SEER R-410A Heat Pump Ductless Mini-Split System, and I’m thrilled with the fantastic price, exceptional equipment quality, and the remarkable performance that has turned my home into a haven of cool comfort!
I recently purchased the 18,000 BTU Mitsubishi 21 SEER R-410A Heat Pump Ductless Mini-Split System, and I am thrilled with its exceptional performance! The price was a pleasant surprise, and the equipment not only cools and heats effectively but also operates quietly, making it an excellent value for money.
The 18,000 BTU Mitsubishi 21 SEER R-410A Heat Pump Ductless Mini-Split System is an incredible find! Its energy efficiency at this price point is astonishing, and the equipment’s top-notch performance makes it a standout choice for year-round comfort.




