Zone Air® DIY 3 ZONE 33,000 BTU (9K+12K+12K) 24 SEER2 230V Wall Mount Ductless Mini-Split Heat Pump System with 3x Pre-Charged Linesets - Up to 1,650 Sq Ft

Two 12K Zones Plus a 9K Zone — a DIY 3 Zone System for Larger Layouts

This 3 zone mini split covers two larger rooms with 12,000 BTU heads and one smaller room with a 9,000 BTU head — up to 1,650 square feet total (450 + 600 + 600) from a single outdoor condenser. It suits homes where two living spaces or primary bedrooms carry most of the load and a third room, office, or nursery needs less. Each head runs independently with its own thermostat, remote, and WiFi app control.

Three pre-charged R454B linesets ship in the box with hand-tight quick-connect fittings, so there's no vacuum pump, no manifold gauges, and no EPA Section 608 license required. Rated 24 SEER2 with heating output down to -13°F. The inverter condenser is rated 27,000 BTU/h with 33,000 BTU/h of indoor capacity connected — a standard multi-zone connection ratio, because three rooms rarely peak at the same moment.

Why You'll Love It

• Capacity Where the Rooms Are Bigger — Two 600 sq ft zones plus one 450 sq ft zone — the most indoor capacity of any Zone Air wall-mount 3 zone bundle without stepping up to an 18K head.
• True DIY Installation — Three pre-charged linesets with hand-tight quick-connect fittings. No refrigerant handling, no vacuum pump, no HVAC license.
• 24 SEER2 Efficiency — The inverter-driven condenser is rated 24 SEER2 and 10.5 HSPF2, shifting output to whichever zones are calling instead of cycling on and off.
• Cold Climate Heating — Rated heating operation down to -13°F, so all three zones stay warm through real winters.
• 5-Year Warranty Protection — Zone Air backs all three heads and the condenser with a 5-year parts and 7-year compressor warranty, plus 30-day returns on uninstalled systems.

What Makes It Different

Most multi-zone mini splits still require a technician to flare fittings, pull a vacuum on three line runs, and weigh in refrigerant. That multiplies install cost by the zone count.

• Three Pre-Charged Linesets — Every line run arrives factory-sealed with R454B already inside. Connect each head with hand tools, torque to spec, and check the joints with soapy water — the refrigerant circuit never opens.
• Understood Connection Ratio — A condenser rated 27,000 BTU/h carries 33,000 BTU/h of connected indoor capacity. Three zones seldom demand full output together, so the inverter compressor redirects capacity to the rooms calling for it. Both figures are printed in the spec table below.
• One Circuit, Not Three — A single 230V circuit on a 30A double-pole breaker powers the whole system, instead of three separate circuits for three single-zone units.

How It Works

1. Mount Three Heads — Install the two 12K heads in the larger rooms and the 9K head in the smaller one, then run the three pre-charged linesets through small wall penetrations to the outdoor unit location.
2. Connect and Check — Hand-thread the quick-connect couplings on each of the three circuits, torque to spec, and test every joint with soapy water before startup.
3. Power and Pair — Wire the outdoor unit to a dedicated 230V circuit (a licensed electrician is recommended for the disconnect box), then pair each head to the WiFi app for room-by-room control.

Who It's For

This 9K + 12K + 12K system is for:

• Homes with two larger rooms around 600 sq ft each plus one smaller room around 450 sq ft
• Open living areas or two primary bedrooms paired with an office, nursery, or guest room
• DIYers comfortable with a weekend project who want to skip a multi-zone installation bill
• Cold climate homeowners who need dependable heat in every zone down to -13°F

Only one large room to cover? The 3 zone 30K (9K+9K+12K) puts capacity in one 600 sq ft zone and two 450 sq ft zones.