Mitsubishi MSZ-GX12NL 12,000 BTU Wall Mounted Indoor Unit - R454B - MSZGX12NLU1
Enjoy powerful, efficient heating and cooling with the Mitsubishi MSZ‑GX12NL, a sleek wall-mounted indoor unit designed for medium-sized rooms needing reliable year-round comfort.
Compact & Stylish Design
The MSZ‑GX12NL features a slim, modern profile that fits seamlessly into living rooms, bedrooms, or offices up to ~500 sq ft, complementing any décor.
Quiet & Energy-Efficient Operation
Operating as low as 23 dB(A), this unit delivers 12,000 BTU cooling and efficient heating (when paired with a compatible outdoor unit) using Mitsubishi’s advanced INVERTER technology for consistent comfort and energy savings.
Advanced Air Filtration & Smart Controls
Equipped with multi-stage filtration and optional Wi-Fi control via Mitsubishi’s app, this model improves indoor air quality and enables convenient remote operation.
Flexible Single-Zone Application
Pairs with Mitsubishi PUZ or MUZ-GX outdoor units in single-zone setups, offering customizable comfort modes for all-season use.
Reliable Mitsubishi Warranty
Backed by Mitsubishi’s 10-year parts warranty when installed and registered by a licensed contractor, the MSZ‑GX12NL ensures lasting, dependable comfort.
What Our Experts Think
-
A reliable 12,000 BTU wall-mounted indoor unit ideal for bedrooms, offices, and small living areas.
-
Uses R454B, a next-generation low-GWP refrigerant for improved environmental performance.
-
Delivers quiet, efficient cooling and heating with Mitsubishi’s trusted inverter technology.
-
Sleek, compact indoor design blends seamlessly with modern interiors.
-
Pairs with compatible Mitsubishi outdoor units for a complete high-efficiency mini-split system.
Q&A
-
Q: What size room is this unit suitable for?
A: Ideal for spaces up to ~450 sq. ft., depending on insulation and layout.
-
Q: Does it support heating as well as cooling?
A: Yes, when paired with a compatible heat pump outdoor unit.
-
Q: What refrigerant does it use?
A: R454B, an eco-friendly refrigerant with reduced global warming potential.
-
Q: Is it quiet?
A: Yes, Mitsubishi indoor units operate at whisper-low sound levels.
Maintenance Tips
-
Clean or replace filters every 2–4 weeks for peak performance.
-
Keep the air intake and outlet clear of obstructions.
-
Schedule annual maintenance with a certified HVAC technician.
-
Wipe the exterior panel with a soft, dry cloth—avoid chemical cleaners.
