Zone Air® Thin-Air 3 ZONE 33,000 BTU (11K+11K+11K) 22 SEER2 230V Concealed Mini-Split Heat Pump System - Up to 1,650 Sq Ft

Three Zones of Completely Invisible Heating and Cooling

This 3 zone concealed ducted mini split hides all three indoor units above the ceiling or inside soffits — the only visible hardware is a discreet supply grille in each zone. Three 11,000 BTU Thin-Air ducted units condition up to 1,650 square feet across three independently controlled zones, and because each unit can feed short duct runs to two or three registers, a single zone can cover a bedroom plus its bathroom and closet.

The 27,000 BTU multi-zone condenser carries a 22 SEER2 ducted rating with heating to -13°F. All three linesets ship pre-charged with R454B and use quick-connect fittings, so the refrigerant side of the install needs no vacuum pump, no gauges, and no EPA license.

Why You'll Love It

• Invisible in Every Room — No wall units, no ceiling cassettes — just grilles. The equipment disappears into attics, soffits, and joist bays, which is why designers specify concealed ducted for luxury renovations and historic homes.
• One Zone Can Serve Multiple Rooms — Each Thin-Air unit supports short duct runs at 0.1-0.4" WG static pressure, so a single 11K zone can supply a primary suite — bedroom, bath, and walk-in — through separate registers.
• Three Independent Zones — Every zone has its own thermostat with wired or wireless control. Upstairs, downstairs, and the studio each hold their own temperature.
• Whisper Quiet — With the blower above the ceiling and air arriving through grilles, in-room sound is as low as 26 dB — quieter than a library.
• Pre-Charged DIY Refrigerant Circuit — Three factory-sealed R454B linesets connect with hand tools. The ductwork takes planning; the refrigerant side does not.

What Makes It Different

Concealed ducted multi-zone is normally the most contractor-dependent mini split configuration there is — every circuit flared, evacuated, and charged on site.

• Pre-Charged, Quick-Connect Circuits — Each lineset arrives sealed with refrigerant inside. Hand-thread, torque to spec, soap-test — the circuit never opens.
• Honest Capacity Numbers — Three 11K units connect 33,000 BTU/h of indoor capacity to a 27,000 BTU/h rated condenser — a standard multi-zone connection ratio, with both numbers printed in the spec table below.
• Serviceable While Hidden — Front-access filters, large service panels, and built-in condensate pumps keep maintenance realistic even with units above the ceiling.

How It Works

1. Set the Units and Ducts — Mount each Thin-Air unit above the ceiling or in a soffit, then run short supply ducts (up to 15 ft per run) to the registers in each zone.
2. Connect the Linesets — Route the three pre-charged linesets to the outdoor unit, hand-thread the quick-connect couplings, torque to spec, and test each joint with soapy water.
3. Power and Control — Wire the condenser to a dedicated 230V circuit (a licensed electrician is recommended for the disconnect), then set up wired or WiFi control per zone.

Who It's For

This 3 zone concealed system is for:

• Luxury renovations and historic homes where visible HVAC equipment is not an option
• Primary-suite-plus layouts where one zone should feed several adjacent rooms through registers
• New additions and ADUs planned with ceiling cavities or soffits for ductwork
• Homeowners comfortable with a more involved install in exchange for completely hidden equipment

Want hidden comfort in just two zones? The Thin-Air dual-zone concealed system covers two.