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Quick specs
Brand
Mitsubishi
SEER2
22.5
Cooling Capacity
18,000 BTU/h
EER2
14.05
Voltage
208/230V, 60Hz, 1-Phase
Refrigerant
R454B
Liquid Line Size
1/4"
Suction/Gas Line Size
1/2"
Max Line Length
100 ft
Not sure this fits your unit?
Call us with your model number and we'll confirm the right part before you order.
18,000 BTU Mitsubishi 22.5 SEER2 R-454B Ductless Air Conditioner Mini-Split System
Cooling-Only Ductless System·22.5 SEER2 Efficiency
$3,585.14
-
- 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.
Secure payment
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18,000 BTU Mitsubishi 22.5 SEER2 R-454B Ductless Air Conditioner Mini-Split System
Licensed HVAC technician required. Must be installed by a certified professional. Improper installation voids the manufacturer warranty.
Need help? (888) 292-0874
- Free shipping — most items ship by the next day
Secure payment
VISA MC AMEX DISC PayPal Affirm CHECK
In stock
In most items, small items ship same day. Complete systems ship next business day.
$3,585.14
-
Need help? (888) 292-0874
- Free shipping — most items ship by the next day
Secure payment
VISA MC AMEX DISC PayPal Affirm CHECK
Quick specs
Brand
Mitsubishi
SEER2
22.5
Cooling Capacity
18,000 BTU/h
EER2
14.05
Voltage
208/230V, 60Hz, 1-Phase
Refrigerant
R454B
Liquid Line Size
1/4"
Suction/Gas Line Size
1/2"
Max Line Length
100 ft
Not sure this fits your unit?
Call us with your model number and we'll confirm the right part before you order.
The Mitsubishi MSY-GX18NL (indoor) and MUY-GX18NL (outdoor) is a 18,000 BTU, high-efficiency, wall-mounted, cooling-only ductless mini-split system. Ideal for spaces up to 1,250 sq ft, this R-454B refrigerant system features a 22.5 SEER2 rating, inverter technology for quiet operation, built-in Wi-Fi, and a superior, allergy-fighting air filtration system.
Key Features and Benefits
- High Efficiency & Performance: With a 22.2 SEER2 rating, this system is designed to provide significant energy savings while maintaining consistent cooling.
- Inverter Driven Compressor: Modulates capacity to eliminate hot/cold spots and prevents the energy waste of constant on/off cycling.
- Eco-Friendly R-454B Refrigerant: Complies with current environmental standards.
- Built-in Wi-Fi: Allows you to control, schedule, and monitor the unit via the Mitsubishi Comfort app on your smart devices.
- Advanced Filtration: Includes a hybrid catechin nano platinum filter designed to capture allergens and neutralize contaminants.
- Quiet Operation: The indoor unit operates at very low noise levels (as low as 45-49 dBA), ideal for bedrooms and living areas.
- Durable Design: The outdoor unit features a Blue Fin coating for enhanced corrosion resistance, extending its lifespan in coastal or humid environments.
Ideal Applications
This system is perfect for residential or commercial spaces, including:
- Room additions
- Finished basements
- Sunrooms
- Offices
- Coastal homes requiring corrosion resistance
Technical Specifications
- Capacity: 18,000 BTU/h (cooling only)
- SEER2: 22.5
- Voltage: 208/230V, 1 Phase, 60Hz
- Max Line Length: 65 Feet
- Refrigerant: R-454B
- Outdoor Unit Dimensions: H40.58″ x W16.55″ x L38.61″
- Indoor Unit Dimensions: H13.4″ x W15.76″ x L45.7″
- Phase: Single
- Hertz: 60
- EER2: 14.05
- Liquid Line Valve Connection: 1/4″
- Suction Line Valve Connection: 1/2″
Key features
- Cooling-Only Ductless System — Mitsubishi wall-mounted mini split
- 22.5 SEER2 Efficiency — high-efficiency inverter technology
- Quiet Inverter Operation — smooth, consistent comfort
- Low-GWP R-454B Refrigerant — next-generation refrigerant
Why homeowners choose NAW
Genuine OEM parts
Every part we sell is the real thing — authorized, factory-genuine, and backed by the full manufacturer warranty.
Easy online ordering
Find your part by model number, add to cart, and get it delivered to your door — no middleman, no markup.
30-day hassle-free returns
Ordered the wrong part? Send it back within 30 days.
Help when you need it
Not sure if this is the right part? Call us at (888) 292-0874 and we’ll help you find the correct replacement.
Outdoor Unit
Height 40.58 in.
Width 16.55 in.
Length 38.61 in.
Indoor Unit
Height 13.4 in.
Width 15.76 in.
Length 45.7 in.
Customer reviews
What buyers are saying
Verified reviews from customers who purchased this product.
5.0
5 verified reviews
TD
Travis D
The 18,000 BTU Mitsubishi 20.5 SEER R-410A Ductless Air Conditioner Mini-Split System exceeded all expectations, providing exceptional cooling power with unmatched efficiency! This system is an amazing value for the quality and performance it brings, making it a must-have for anyone seeking reliable, high-grade comfort.
KT
Kate T
The 18,000 BTU Mitsubishi Mini-Split System is a true game-changer, offering remarkable cooling power and efficiency at a price that feels like a bargain. Its 20.5 SEER rating is a standout, providing excellent energy savings while keeping my entire space perfectly comfortable.
PN
Porter N
I recently purchased the 18,000 BTU Mitsubishi 20.5 SEER R-410A Ductless Air Conditioner Mini-Split System, and I’m thrilled by the outstanding price, exceptional equipment quality, and the remarkable cooling performance, creating a refreshing oasis in my living space.
M
Marky
I recently purchased the 18,000 BTU Mitsubishi Ductless Mini-Split System, and I’m over the moon! The price was unbelievably reasonable, and the equipment’s 20.5 SEER rating ensures my space stays refreshingly cool with outstanding energy efficiency – a game-changer in both performance and savings.
S
Stuart
The 18,000 BTU Mitsubishi 20.5 SEER R-410A Ductless Air Conditioner Mini-Split System is a revelation in home cooling! Its exceptional energy efficiency, paired with an unbelievable price point, delivers superior comfort and savings, making it an absolute game-changer for any home.
