Zone Air® DIY 3 ZONE 27,000 BTU (9K+9K+9K) 24 SEER2 230V Wall Mount Ductless Mini-Split Heat Pump System with 3x Pre-Charged Linesets - Up to 1,350 Sq Ft

Three 9K Zones, One Outdoor Unit — a Right-Sized DIY 3 Zone System

This 3 zone 9K mini split heats and cools three separate rooms — up to 1,350 square feet total, about 450 sq ft per zone — from a single outdoor condenser. Each 9,000 BTU wall mount head runs independently with its own thermostat, remote, and WiFi app control, so a bedroom can sit at 68°F while the office holds 72°F and the guest room stays off entirely. Three pre-charged R454B linesets ship in the box, so there's no vacuum pump, no manifold gauges, and no EPA Section 608 license — the same DIY install as every Zone Air system, three times over.

Because three 9,000 BTU heads connect to exactly 27,000 BTU/h of outdoor capacity, this is one of the most tightly matched multi-zone systems we sell — the inverter condenser rarely has to stretch, and it throttles down to sip power when only one zone calls for comfort. Rated 24 SEER2 with heating output down to -13°F, one outdoor unit also means one set of penetrations, one electrical circuit, and one condenser on the pad instead of three.

Why You'll Love It

• Right-Sized for Smaller Rooms — Three 9,000 BTU zones cover up to 450 sq ft each — ideal for bedrooms, offices, and nurseries where a 12K head would short-cycle and waste energy.
• True DIY Installation — Three pre-charged linesets with hand-tight quick-connect fittings. No refrigerant handling, no vacuum pump, no HVAC license. Installing three zones yourself saves thousands versus a contracted multi-zone install.
• 24 SEER2 Efficiency — The inverter-driven 27K condenser is rated 24 SEER2 and 10.5 HSPF2, and because it is closely matched to the three 9K heads it modulates smoothly 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 the whole system — 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.
• Tightly Matched Capacity — Three 9,000 BTU heads connect to a 27,000 BTU/h rated condenser — a near 1:1 match, so the system runs comfortably even when all three rooms call for cooling at once. Both numbers 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 each 9K wall mount indoor unit in its room and run the three pre-charged linesets through small wall penetrations back 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 3 zone 9K system is for:

• Homes with three smaller rooms — bedrooms, offices, nurseries — around 300–450 sq ft each
• DIYers comfortable with a weekend project who want to skip a $3,000-plus multi-zone installation bill
• Additions, upstairs floors, and ranch layouts where three modest rooms share one side of the house
• Cold climate homeowners who need dependable heat in every zone down to -13°F

Have larger rooms to cover? The 3 zone 36K (12K×3) system steps each zone up to 600 sq ft.