Mini Split Multi 4 Zone Mitsubishi 21 SEER2 Heat Pump R-454B Condenser, MXZ4D30NL
This is the efficiency leader of Mitsubishi's R-454B multi-zone range at 21 SEER2, 13 EER2, and a 10 HSPF2 — the highest seasonal cooling rating of the five, with four zones. Rated 28,600 BTU/h in both cooling at 95°F and heating at 47°F, it reaches a maximum heating output of 36,000 BTU/h and accepts up to 36,000 BTU/h of total connected indoor capacity. Every zone can be specified independently as an MSZ-GX wall-mount head, which includes a wireless remote controller as standard, or an SLZ-AF four-way ceiling cassette with its SLP-18FAU grille included. Piping allows 230 feet total with 82 feet to the furthest unit and 49 feet of height difference either way. kumo cloud Wi-Fi ready. Choose your indoor units below.
Four Zones at the Range's Best Efficiency
The reason this model stands out is the pairing of zone count with rating. It carries four zones at 21 SEER2 while the five-zone units drop to 19.2 and 19.3, so a four-room project gets the best seasonal efficiency in the lineup without paying an efficiency penalty for choosing the smaller condenser. The 36,000 BTU/h connected-capacity ceiling against a 28,600 BTU/h cooling rating gives about 26 percent of over-connection to distribute across the rooms.
Four zones typically means a three-bedroom home with a living area, or two bedrooms plus an office and great room. With cassettes now available alongside wall-mount heads, the format decision can follow each room rather than the whole house: a flush cassette in the main living space and wall-mount heads in bedrooms is a common and cost-effective pattern. Each room needs its own load calculation against insulation, glazing area and orientation, ceiling height and volume, air infiltration, occupancy, and equipment heat — and the resulting set of four must satisfy both the connected-capacity limit and the indoor/outdoor compatibility table.
Ideal for: Three-bedroom homes with a living area, two bedrooms plus office and great room, homes with no existing ductwork, multi-story layouts, small multi-family buildings, and commercial suites with four separately controlled spaces where a flush ceiling cassette suits the public-facing rooms.
Need more capacity or zones? Step up to the 5 Zone Mitsubishi MXZ5D36NL condenser, which adds a fifth zone and raises connected capacity to 41,000 BTU/h.
Recommended applications are general guidelines only. Actual system requirements depend on insulation, glazing, ceiling height, ambient conditions, occupancy, and internal heat gain in each zone. Always verify indoor unit selection against the connected-capacity limits on the submittal and the compatibility table in the technical specifications. Request free sizing assistance, contact Budget Heating, or call 813-885-7999.
What's Included
| Outdoor Condenser | MXZ-4D30NL — 4 Zone Multi-Zone Inverter Heat Pump Condenser |
|---|---|
| Indoor Unit Options | Selected Separately Below — MSZ-GX 6K through 24K Wall-Mount or SLZ-AF 9K through 18K Ceiling Cassette |
| Zones Supported | 2 to 4 Indoor Units |
| Rated Capacity | 28,600 BTU/h Cooling @ 95°F / 28,600 BTU/h Heating @ 47°F |
| Maximum Capacity | 28,600 BTU/h Maximum Cooling / 36,000 BTU/h Maximum Heating |
| Max Connected Indoor Capacity | 36,000 BTU/h Total (12,000 BTU/h Minimum) |
| Low-Temperature Heating | 21,000 BTU/h Max @ 17°F / 19,800 BTU/h Max @ 5°F |
| Efficiency | 21 SEER2 / 13 EER2 / 10 HSPF2 — Highest SEER2 in the MXZ R-454B Range |
| Maximum Line Length | 230 ft Total / 82 ft to Furthest Indoor Unit / 49 ft Height Difference |
| Refrigerant | R-454B Low-GWP, 5 lb 5 oz Factory Pre-Charge |
| Electrical | 208/230V, Single Phase, 60 Hz — 28.7 A MCA, 25 A Recommended Breaker |
| Controls | Wireless Remote Controller Standard With MSZ-GX Heads; Controller Selected Separately for SLZ Cassettes; kumo cloud Wi-Fi Ready |
| Warranty | 10 Year Manufacturer Warranty |
AHRI certification 216498926 applies to this condenser. The cabinet measures 37-13/32 in. wide x 13 in. deep x 31-11/32 in. high at 137 lb — the same footprint as the three-zone model, which makes it a straightforward substitution if a fourth room gets added during design. Sound pressure is 53 dB(A) cooling and 56 dB(A) heating, with 48 A maximum overcurrent protection. Cooling operates to a 14°F intake and heating to a 6°F intake. Efficiency figures shown are the non-ducted ratings; the submittal publishes separate mixed and ducted columns.
Condenser & Indoor Unit Features
MXZ-4D30NL Outdoor Condenser
- 21 SEER2 — the highest seasonal cooling rating in this R-454B multi range
- Maximum heating output of 36,000 BTU/h at 47°F
- Accepts up to 36,000 BTU/h of total connected indoor capacity
- Serves two, three, or four independently controlled zones
- 13 EER2 full-load efficiency with a 10 HSPF2 heating rating
- 21,000 BTU/h maximum heating at 17°F and 19,800 BTU/h at 5°F
- Low-GWP R-454B refrigerant with a 5 lb 5 oz factory pre-charge
- 230 ft total piping, 82 ft to furthest unit, 49 ft height either way
- Same 137 lb cabinet footprint as the three-zone MXZ-3D24NL
- kumo cloud compatible for app scheduling and remote monitoring
Wall-Mount and Ceiling Cassette Options
- Specify each of the four zones independently as wall-mount or cassette
- MSZ-GX wall-mount heads from 6K through 24K BTU
- Every MSZ-GX head includes a wireless remote controller as standard
- SLZ-AF09NL, AF12NL, AF15NL and AF18NL four-way ceiling cassettes
- SLP-18FAU grille included with each cassette selection
- Cassettes finish flush in a standard 24" x 24" ceiling grid
- Four-way discharge suits square rooms and open living areas
- Integral drain-up pump lifts condensate up to 33 inches
- Long-life air filter included on the cassettes
- SLZ controller selected per zone — handheld, wall-mounted, or thermostat
Specifications & Manuals
Review the submittal sheet for connected-capacity limits and configuration-specific performance, the MXZ Multi Technical Specifications for the Indoor / Outdoor Unit Compatibility Table, and the SLZ document set for cassette dimensions, ceiling requirements, and controller options. A 137 lb condenser should be set on a rated condenser pad, wall mount or tie down.
Frequently Asked Questions
Why is the four-zone unit more efficient than the five-zone models?
Compressor and coil sizing relative to connected load. This condenser is rated 21 SEER2 while the MXZ-5D36NL is 19.2 and the MXZ-5D42NL is 19.3. If your project fits four zones, this is the most efficient way to do it in the R-454B multi range — there is no penalty for choosing fewer zones.
Can all four zones be ceiling cassettes?
Nothing on the condenser side prevents it, and the compatibility table in the technical specifications confirms cassette models are approved. The practical limits are the 36,000 BTU/h connected-capacity ceiling and whether every room has an accessible dropped ceiling with sufficient plenum depth. Four cassettes also means four separately selected controllers.
Is this the same physical size as the three-zone condenser?
Yes — both the MXZ-3D24NL and MXZ-4D30NL measure 37-13/32 x 13 x 31-11/32 inches at 137 lb. That matters during design: if a fourth room gets added after the pad is poured or the wall bracket is set, the swap does not change the footprint or mounting.
Does mixing cassettes and wall-mount heads change the efficiency rating?
The ratings quoted here are the submittal's non-ducted figures, which is the column that applies to wall-mount heads and ceiling cassettes. The sheet also publishes mixed and fully ducted columns for installations that include ducted air handlers. Confirm the applicable column against your final indoor unit mix.
How much space is needed above the ceiling for a cassette?
The cassette body is roughly 22-7/16 inches square and needs its full depth plus clearance for the drain connection, refrigerant lines, and future service access above the tile. The SLZ Installation Instructions give the exact minimum plenum depth — check it against your actual joist or truss space before committing a room to a cassette.
What size electrical service does a four-zone system need?
One two-pole 208/230V circuit with a 28.7 A minimum circuit ampacity, 48 A maximum overcurrent protection, and a 25 A recommended breaker. Indoor units are powered from the outdoor unit, so no additional branch circuits are needed for the heads or cassettes.
MXZ-4D30NL Submittal SheetMXZ Technical SpecificationsMXZ Installation InstructionsMXZ Parts ManualMXZ Service ManualMSZ GX Technical SpecificationsMSZ GX Installation InstructionsMSZ GX Operation InstructionsMSZ GX Parts ManualSLZ Technical SpecificationsSLZ Installation InstructionsSLZ Service ManualSLZ Parts List
