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DELLA
Della Optima Series 35000 BTU Dual Zone Mini Split AC with R-454B (18K+24K) – Up to 2500 Sq.Ft.
PVP: $4,312.96$3,749.96 -
DELLA
Della Optima Series 35000 BTU Dual Zone Mini Split AC with R-454B (18K+24K) – Up to 2500 Sq.Ft.
PVP: $4,312.96$3,749.96 -
DELLA
Della Optima Series 35000 BTU Dual Zone Mini Split AC with R-454B (18K+18K) – Up to 2000 Sq.Ft.
PVP: $4,139.96$3,599.96 -
DELLA
Della Optima Series 35000 BTU Dual Zone Mini Split AC with R-454B (12K+24K) – Up to 2050 Sq.Ft.
PVP: $4,139.96$3,599.96 -
DELLA
Della Optima Series 35000 BTU Dual Zone Mini Split AC with R-454B (12K+18K) – Up to 1550 Sq.Ft.
PVP: $3,967.96$3,449.96 -
DELLA
Della Optima Series 27000 BTU Dual Zone Mini Split AC with R-454B (9K+18K) – Up to 1400 Sq.Ft.
PVP: $3,334.96$2,899.96 -
DELLA
Della Optima Series 27000 BTU Dual Zone Mini Split AC with R-454B (9K+12K) – Up to 950 Sq.Ft.
PVP: $3,162.96$2,749.96 -
DELLA
Della Optima Series 27000 BTU Dual Zone Mini Split AC with R-454B (18K+18K) – Up to 2000 Sq.Ft.
PVP: $3,564.96$3,099.96 -
DELLA
Della Optima Series 27000 BTU Dual Zone Mini Split AC with R-454B (12K+18K) – Up to 1550 Sq.Ft.
PVP: $3,392.96$2,949.96 -
DELLA
Della Optima Series 27000 BTU Dual Zone Mini Split AC with R-454B (12K+12K) – Up to 1100 Sq.Ft.
PVP: $3,219.96$2,799.96 -
DELLA
Della Optima Series 18000 BTU Dual Zone Mini Split AC with R-454B (9K+9K) – Up to 800 Sq.Ft.
PVP: $2,759.96$2,399.96 -
DELLA
Della Optima Series 18000 BTU Dual Zone Mini Split AC with R-454B (9K+12K) – Up to 950 Sq.Ft.
PVP: $2,817.96$2,449.96
2 Zone Mini Split Systems
Explore high-efficiency ductless mini split systems engineered for single-zone and multi-zone climate control. Featuring inverter compressor technology, ultra-quiet operation, and 2026 low-GWP refrigerant compliance.
System Sizing & Selection Guide
| Capacity / Tonnage | Square Footage Coverage | Electrical Voltage | Recommended Application |
|---|---|---|---|
| 9,000 BTU (0.75 Ton) | Up to 400 sq ft | 115V / 230V | Bedrooms, Home Offices, Sunrooms |
| 12,000 BTU (1.0 Ton) | 400 - 550 sq ft | 115V / 230V | Master Bedrooms, Living Rooms, Garages |
| 18,000 BTU (1.5 Ton) | 550 - 1,000 sq ft | 208/230V | Open Concept Living Areas, Workshops |
| 24,000 BTU (2.0 Ton) | 1,000 - 1,500 sq ft | 208/230V | Large Basements, Commercial Spaces |
| 36,000 BTU (3.0 Ton) | 1,500 - 2,000 sq ft | 208/230V | Whole House / Multi-Room Floor Plans |
Frequently Asked Questions & Expert Guidance
A: As a general guideline: 9,000 BTU covers up to 400 sq ft; 12,000 BTU covers up to 550 sq ft; 18,000 BTU covers up to 1,000 sq ft; 24,000 BTU covers up to 1,500 sq ft; and 36,000 BTU covers up to 2,000 sq ft. For spaces with high ceilings or sun exposure, step up one capacity level.
A: Single-zone 9,000 and 12,000 BTU systems are available in 115V or 208/230V options. All 18,000 BTU and larger units (and multi-zone condensers) require dedicated 208/230V single-phase circuits.
A: Yes, all active systems on Mini Split Systems Direct comply with current EPA low-GWP refrigerant transition standards (R-454B / R-32).
| Application Tier | Recommended Brand | Max Efficiency (SEER2) | Low-Ambient Heating | Refrigerant Status (2026) | Primary Advantage |
|---|---|---|---|---|---|
| Best Overall / Premium | Daikin / Mitsubishi | Up to 28.0 SEER2 | 100% Capacity at -5°F | R-32 / R-454B Compliant | Variable-speed inverter precision; unmatched component lifespan. |
| Best High-Value Wholesale | Goodman / ACiQ | Up to 22.5 SEER2 | Effective down to -13°F | R-454B Low-GWP Transitioned | Shared Daikin global compressor platforms at wholesale pricing tiers. |
| Best DIY / Easy Install | MRCOOL 4th Gen | Up to 22.0 SEER2 | Effective down to -4°F | R-410A / R-32 Mix (Check SKU) | Pre-charged Quick-Connect line sets; eliminates need for a vacuum pump. |