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Licensed tech included free 10-yr parts & compressor Ships to 48 states

GWIN™ Assisted DIY™ systems

DIY mini splits, done right.

Choose your single-zone or multi-zone system. Install it yourself Then a licensed HVAC tech (included free) comes to deliver and leak-test the refrigerant and commission your startup. Every system is backed by a first-year bumper-to-bumper warranty plus 10-year parts and compressor coverage — even on a homeowner self-install.

Shop the systemsHow Assisted DIY™ works

Central Ducted Systems

Max home comfort, central and ducted.

Get max home comfort with the GWIN™ Max 22 central ducted heat pump system. Tight spaces, multiple mounting positions, extreme conditions — no match for the Max. One central system ducts conditioned air to every room, sized 18k–60k BTU, with a licensed tech included on every install.

Build my central ducted systemHow Assisted DIY™ works
Licensed Tech Included Free In your included visit your tech delivers and leak-tests your refrigerant and commissions startup. We guarantee a tech visit in the lower 48. If we can't place a tech within 30 days, your whole system is free.
Iron-Clad DIY Warranty You get bumper-to-bumper coverage for the first year plus 10-year parts and compressor coverage, including the sourcing and shipping of parts. Even your self-install is covered. Warranties transfer with the equipment if you sell the house.
Manufacturer-Direct Financing Apply right through GWIN™ — no guessing or third-party financing checkouts. See your monthly payment update as you build your system, right in our online builder.
Last reviewed June 2026 · Written by GWIN HVAC Technical Team · Reviewed by George Cervino (TN License #73776) and James Brown (EPA Section 608 Certified)
Single-Zone Systems

One room, done right

One condenser, one air handler. Pick a series, then choose the BTU size that fits the room — every system ships with a licensed tech included.

Multi-Zone Systems

One condenser, many rooms

Size a single outdoor unit, then build the combination of air handlers that matches your home. Start with the calculator, then pick your zone count.

Central Ducted Systems

Whole-home comfort, completely concealed

The built-in feel of central air with ductless efficiency — one hidden air handler ducts conditioned air to every room, nothing on the wall. Size your whole-home load below; every GWIN™ Max 22 ships with a licensed tech included and the same iron-clad warranty.