Mitsubishi
Mitsubishi 20,000 BTU (6K + 9K) GX-Series 20 SEER2 Dual Zone Wall Mount Mini Split Heat Pump System - R454B | 230V
1.75 Ton | SEER2 20 | R-454B | 208-230V
- 20000 BTU cooling capacity
- Up to 20 SEER2 rated efficiency
- Uses R-454B refrigerant
- Runs on 208-230V power
Key Specifications
Product Overview
Mitsubishi GX-Series 2-Zone Wall-Mount Mini Split Heat Pump - 6K + 9K
Comfort for two separate rooms from one Mitsubishi multi-zone outdoor condenser. This GX-Series system pairs the MXZ-2D20NL outdoor heat pump with 6K + 9K wall-mounted indoor units for efficient heating and cooling without adding ductwork.
The outdoor system is in Mitsubishi's 20,000 BTU class. For non-ducted indoor combinations like this wall-mount setup, the catalog lists 18,000 BTU cooling, 24,000 BTU heating, 20 SEER2 efficiency, and AHRI certificate 216498925.
This standard heat pump configuration is a strong fit for efficient two-room comfort where extreme low-temperature capacity is not the main design requirement.
At a Glance:
| Best For | two rooms where high-efficiency heating and cooling matter, but Hyper Heat output is not required |
| System Models | MXZ-2D20NL / MSZ-GX06NL / MSZ-GX09NL |
| Indoor Combination | 6K + 9K |
| AHRI Non-Ducted Capacity | 18,000 BTU cooling / 24,000 BTU heating |
| Heating Capacity at 5F | 13,700 BTU |
| Efficiency | 20 SEER2 / 13.0 EER2 / 10.0 HSPF2 |
| Voltage | 208/230V, 1 phase |
| Refrigerant | R-454B |
| Controls | Handheld remote included / WiFi built in on GX wall-mounted indoor units |
| Installation Type | Professional HVAC installation required |
Why Choose This Mitsubishi 2-Zone System?
- Two-room comfort: Heat and cool two spaces independently using one outdoor condenser.
- GX wall-mounted indoor units: GX indoor units include handheld remote control capability and built-in WiFi per the catalog.
- Efficient inverter performance: Mitsubishi inverter technology varies output to help maintain steadier comfort than basic on/off equipment.
- Current-generation refrigerant: Built around Mitsubishi's R-454B equipment lineup.
- Clean installation profile: Wall-mounted indoor units avoid ductwork and are well suited for bedrooms, offices, additions, bonus rooms, and other defined spaces.
What Is Included?
- 1 Mitsubishi MXZ-2D20NL outdoor multi-zone heat pump condenser
- 1 Mitsubishi MSZ-GX06NL 6K wall-mounted indoor unit
- 1 Mitsubishi MSZ-GX09NL 9K wall-mounted indoor unit
- Handheld remote control capability for each indoor unit
Line-set note: choose a line-set length for each indoor unit. Select None for any zone where you do not want a line set included. Mixed-length line sets are supported; electrical accessories, pads, brackets, disconnects, condensate pumps, and other installation materials may need to be quoted or purchased separately.
Before You Order:
- Have your installer confirm room loads, indoor placement, outdoor placement, line-set routing, electrical requirements, and local code requirements.
- Nominal indoor sizes like 6K + 9K are not a substitute for a Manual J load calculation.
- This is not a DIY quick-connect system. Refrigerant piping, evacuation, electrical work, startup, and commissioning should be handled by a qualified HVAC professional.
- The outdoor condenser is a two-port multi-zone unit, so no branch box is required for this configuration.
Frequently Asked Questions:
Why does the title say 20,000 BTU if the indoor combination is 6K + 9K?
The outdoor unit is Mitsubishi's 20,000 BTU class MXZ-2D20 condenser. The catalog's non-ducted AHRI configuration for this condenser lists 18,000 BTU cooling and 24,000 BTU heating.
Can each room have its own temperature setting?
Yes. Each wall-mounted indoor unit can be controlled separately, subject to normal multi-zone operating limits.
Are line sets included?
Only if you select a line-set package variant. The package options are set up as matching pairs for both zones.
Is this a DIY system?
No. Mitsubishi multi-zone equipment should be installed and commissioned by a qualified HVAC professional.
Specifications:
| BRAND NAME | Mitsubishi |
| SERIES | GX-Series |
| SYSTEM TYPE | 2-zone ductless mini split heat pump |
| OUTDOOR MODEL | MXZ-2D20NL |
| INDOOR MODELS | MSZ-GX06NL / MSZ-GX09NL |
| ZONE CAPACITY | 2 zones |
| AHRI CERTIFICATE NUMBER | 216498925 |
| AHRI TYPE | Non-ducted indoor units |
| COOLING CAPACITY | 18,000 BTU |
| HEATING CAPACITY | 24,000 BTU |
| HEATING CAPACITY AT 5F | 13,700 BTU |
| SEER2 | 20 |
| EER2 | 13.0 |
| HSPF2 | 10.0 |
| REFRIGERANT TYPE | R-454B |
| POWER SUPPLY | 208/230V, 1 phase |
| OUTDOOR UNIT TYPE | Standard Heat Pump ported multi-zone condenser |
| REGISTERED WARRANTY | 10-year parts and compressor limited warranty when registered within 90 days; terms apply |
| NON-REGISTERED WARRANTY | 5-year parts / 7-year compressor limited warranty; terms apply |
Indoor Unit Details:
| Indoor Model | Nominal Size | Rated Indoor Capacity | Line Size | Dimensions |
| MSZ-GX06NL | 6K | 6,000 BTU cooling / 7,200 BTU heating | 1/4 in liquid / 3/8 in gas | 11-25/32 in H x 31-13/32 in W x 9-21/32 in D |
| MSZ-GX09NL | 9K | 9,000 BTU cooling / 10,900 BTU heating | 1/4 in liquid / 3/8 in gas | 11-25/32 in H x 31-13/32 in W x 9-21/32 in D |
Technical Specifications
Performance
| System Type | Mini-Split |
|---|---|
| Capacity | 20000 BTU |
| Tonnage | 1.75 Ton |
| SEER2 | 20 |
Electrical & Fuel
| Voltage | 208-230V |
|---|---|
| Phase | Single Phase |
| Refrigerant | R-454B |
Shipping & Delivery
Manufacturer Warranty
Professional Installation Recommended
Most HVAC equipment must be installed and connected by a licensed professional to remain safe, code-compliant, and eligible for manufacturer warranty coverage. If you're unsure about installation requirements, contact us before you order.
Make sure it is the right size, and that you have the rest of it
Most outdoor units ship alone. If you are not certain of the capacity, or of what has to go with this unit, these two will work it out with you.
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