Zone Air® DIY DUAL ZONE 27,000 BTU (9K+18K) 24 SEER2 230V Wall Mount Ductless Mini-Split Heat Pump System with 2x Pre-Charged Linesets - Up to 1,350 Sq Ft

One 18K Zone, One 9K Zone — a DIY Dual Zone System Sized for Unequal Rooms

Most homes don't have two rooms the same size. This dual zone system pairs an 18,000 BTU head for a great room, open living area, or finished basement with a 9,000 BTU head for a bedroom, office, or nursery — up to 1,350 square feet across the two zones, from one outdoor condenser. Each head runs independently with its own thermostat, remote, and WiFi app control, so the main space can hold 70°F while the bedroom sits at 66°F or shuts off entirely.

Two 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. The 27,000 BTU/h inverter condenser is matched almost exactly to the 27,000 BTU/h of connected indoor capacity, so it rarely has to stretch — and it throttles down to sip power when only one zone is calling. Rated 24 SEER2 with heating output down to -13°F.

Why You'll Love It

• Sized for Rooms That Aren’t Equal — An 18,000 BTU head covers up to 900 sq ft while the 9,000 BTU head handles up to 450 sq ft — so you are not overpaying to oversize a bedroom or underpowering a living room to match it.
• True DIY Installation — Both linesets arrive factory-sealed with refrigerant already inside. Connect by hand, torque to spec, and check the joints — no refrigerant handling, no vacuum pump, no HVAC license.
• Near 1:1 Capacity Match — Two heads totalling 27,000 BTU/h connect to a condenser rated 27,000 BTU/h, so the system stays comfortable even when both rooms call for cooling at the same time.
• Cold Climate Heating — Rated heating operation down to -13°F, so both the large room and the small one stay warm through real winters.
• 5-Year Warranty Protection — Zone Air backs both 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

Buying two separate single-zone systems for a large room and a small one means two condensers on the pad, two sets of wall penetrations, and two electrical circuits. This bundle does it with one of each.

• Two Pre-Charged Linesets — Each line run arrives sealed with R454B inside — one sized for the 9K head, one for the 18K head. The refrigerant circuit never opens during install.
• One Condenser, Two Very Different Zones — The inverter compressor shifts output to whichever zone is calling, so an 18K living room and a 9K bedroom can share hardware without fighting each other.
• One Circuit, Not Two — A single 230V circuit on a 30A double-pole breaker powers both zones, instead of two separate circuits for two standalone systems.

How It Works

1. Mount Both Heads — Install the 18K head in the larger space and the 9K head in the smaller room, then run each pre-charged lineset through a small wall penetration to the outdoor unit location.
2. Connect and Check — Hand-thread the quick-connect couplings on both 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 + 18K dual zone system is for:

• A large main room — living room, great room, open kitchen, finished basement — plus one smaller adjacent room
• Homeowners who found that two equal-size heads either oversize the bedroom or undersize the living space
• DIYers comfortable with a weekend project who want to skip a multi-zone installation bill
• Cold climate homes that need dependable heat in both a big room and a small one down to -13°F

Rooms closer in size? The dual zone 24K (12K+12K) splits capacity evenly across two 600 sq ft spaces.