Mini-Split Systems

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HVAC SYSTEMS — MINI-SPLITS

Mini-Split & Ductless HVAC Systems

We help contractors, facility managers, and procurement teams source ductless mini-split systems, multi-zone systems, and replacement components. Availability may vary by supplier, stock status, manufacturer policy, and product type.

What This Category Includes

ⓘ We do not claim authorized dealer or factory-direct status. For system sizing, zone compatibility, or OEM part lookup, submit your model number, serial number, or equipment label photo.

Single-Zone Mini-Splits

One outdoor unit + one indoor air handler. Ideal for single rooms, additions, server rooms, and zone-specific comfort control.

Multi-Zone Systems

One outdoor unit + 2–8 indoor air handlers. Each zone independently controlled. Requires matched outdoor unit rated for total BTU load.

DIY Mini-Split Systems

Pre-charged line set systems designed for simplified installation. Verify local permit and licensing requirements before purchase.

Ceiling Cassette Units

Recessed ceiling-mount indoor units for commercial and light commercial applications. 360° or 2-way airflow patterns available.

Floor Console Units

Floor-mounted indoor units for perimeter heating/cooling. Suitable for spaces with limited wall area.

Concealed Duct Units

Low-static ducted indoor units for mini-split systems requiring air distribution through short duct runs.

System Sizing Reference

Zone Size (Approx.)	Recommended Capacity	Notes
Up to 350 sq ft	9,000 BTU	Small bedroom, office, server room
350–550 sq ft	12,000 BTU (1 ton)	Standard bedroom, small living area
550–850 sq ft	18,000 BTU (1.5 ton)	Large bedroom, open living area
850–1,200 sq ft	24,000 BTU (2 ton)	Large open space, small commercial
1,200–1,600 sq ft	30,000 BTU (2.5 ton)	Large commercial zone
1,600–2,000 sq ft	36,000 BTU (3 ton)	Large open commercial space

ⓘ Sizing estimates are approximate. Manual J load calculation is required for accurate system sizing. Factors include insulation, window area, climate zone, occupancy, and internal heat loads.

Frequently Asked Questions

Q: What is a mini-split system?

A mini-split (ductless) system consists of an outdoor condensing unit connected to one or more indoor air handlers via refrigerant line sets. No ductwork is required. Mini-splits are used for zone-by-zone heating and cooling in residential, commercial, and retrofit applications.

Q: What is the difference between a single-zone and multi-zone mini-split?

A single-zone system connects one outdoor unit to one indoor air handler. A multi-zone system connects one outdoor unit to two or more indoor air handlers, each independently controlled. Multi-zone systems require an outdoor unit rated for the number of zones and total BTU load.

Q: What BTU size mini-split do I need?

BTU sizing is based on the room or zone cooling/heating load, calculated using Manual J methodology. As a rough guide: 9,000 BTU for up to 350 sq ft; 12,000 BTU for up to 550 sq ft; 18,000 BTU for up to 850 sq ft; 24,000 BTU for up to 1,200 sq ft. Contact us with your zone dimensions and insulation details for sourcing guidance.

Q: Can mini-splits be installed without a licensed HVAC contractor?

DIY-friendly mini-split systems (such as MRCOOL DIY series) are available with pre-charged line sets and simplified installation. However, local codes may require licensed contractor installation and permits. Verify local requirements before purchasing.

Q: What refrigerant do mini-split systems use?

Most current mini-split systems use R-410A. Newer systems are transitioning to R-32 and R-454B. Verify the refrigerant type before ordering replacement parts or refrigerant.