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Zone Air HVAC Mini Split - Professional HVAC, DIY Prices
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Zone Air® Thin-Air 3 ZONE 28,500 BTU (9.5K+9.5K+9.5K) 22 SEER2 230V Concealed Mini-Split Heat Pump System - Up to 1,425 Sq Ft

$5,499.99$6,699.99
Save $1200 (18% OFF)
Or as low as $458/mo with Affirm
Zone Air customers saved over $3,000 on average with our DIY units in 2025, compared to contractor installation.
USA based testing, inspection, and final assembly

At a Glance

Power: 208-230V / 30A, dedicated circuit, electrician recommended
Room size: Up to 1,425 sq ft in mild climates
Install: DIY install, pre-charged quick connect systems mean no vacuum pump or contractor needed — ductwork may require a professional
Lineset: 3x 16 ft pre-charged included, each can be extended up to 50 ft (custom lengths available)
Room size varies by climate, insulation, and window exposure. Use our calculator for an exact recommendation. Do not use an extension cord.
Free shipping · Estimated delivery: Thursday, Aug 6

Choose your lineset lengths

One pre-charged lineset per zone — 3 included at 16 ft. Pick a longer run for any zone that needs it.

Zone 1

Zone 2

Zone 3

Frequently Purchased Together

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Lineset Cover Kit
16 ft. Decorative Lineset Cover
Hide exposed lines — paintable PVC · up to 3
$99.99
Mounting Bracket
Wall Mount Bracket
Heavy-duty, holds up to 550 lbs
+$109.99
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Zone Air Guarantee

5 year parts, 7 year compressor warranty — 30 day returns — Live US support 9–5 MST

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System Overview

28,500 BTU
Capacity
208-230V / 30A
Power
22 SEER2
Efficiency
Independent zone control
Cold climate performance
39 dB per unit
Sound
Up to 1,425 sq ft
Max room size

Your Purchase Includes

Everything you need for a complete installation

Indoor Unit
3x Indoor Air Handlers
Outdoor Condenser
Outdoor Condenser
Pre-Charged Lineset
Pre-Charged Linesets
Installation Kit
Installation Kit
Remote Control
3x Wired Controllers

Summary

  • Voltage: 208-230V
  • Environmentally friendly R454B (pre-charged)
  • Low ambient range operation: heating down to Independent zone control
  • Variable-speed DC inverter driven performance
  • Pre-charged lineset included for DIY installation
  • Energy Star certified

Technical Information & Performance

SYSTEM KIT

Connected Indoor Capacity28,500 BTU/h (3× 9,500)
Per Zone Capacity9,500 BTU/h each
Outdoor Unit Rated Cooling Capacity27,000 BTU/h (4,500-31,000 range)
Outdoor Unit Rated Heating Capacity28,000 BTU/h (4,500-33,000 range)
SEER2 Rating (Ducted)22
HSPF2 Ducted (Region IV/V)9.0 / 7.8
Voltage208-230V / 60Hz
Breaker Needed30A (double-pole)
Number of Zones3
Refrigerant TypeR454B (pre-charged)
Indoor Units3× concealed units
Indoor Unit Dimensions36" W × 9" H × 20" D each
Linesets Included3× 16 ft pre-charged
Operating Temperature-13°F to 131°F
Sound Level (per unit)26–40 dB
Outdoor Sound Level62 dB(A)
Outdoor Unit Dimensions (WxDxH)38-1/2" x 16-1/2" x 31-5/8"
Outdoor Unit Weight119 lbs
External Static Pressure0.1-0.4" WG
Maximum Duct Length15 ft per supply
Condensate PumpsIntegrated in each unit

INDOOR UNIT

Part Numberzdiy-cd-9I
Net Dimensions (WxDxH)27-1/2" x 19-1/4" x 7-7/8"
Carton Dimensions (WxDxH)Coming soon
Net / Gross WeightComing soon

OUTDOOR UNIT

Part Numberzdiy-cd-27O
Breaker Needed30A (double-pole)
Net Dimensions (WxDxH)38-1/2" x 16-1/2" x 31-5/8"
Sound Level62 dB(A)
Carton Dimensions (WxDxH)Coming soon
Net / Gross Weight119 lbs
Zone Air® Product Series

Thin-Air Concealed Series

Zone Air® concealed ducted systems hide completely above ceilings or in closets with only supply and return grilles visible. Ultra-slim design with built-in condensate pump and high static pressure for flexible duct routing.

Quick-connect lineset installation

0:00 / 0:00

Product Warranty

Coverage applies to the original purchaser with proof of purchase. See our Warranty Policy.

  • 5 years warranty on parts
  • 7 years warranty on compressor

Manuals & Documents

Hidden Installation

Completely Invisible HVAC

Hidden Installation

Installs above ceilings or in closets with only discreet supply and return grilles visible.

Fits Almost Anywhere

Ultra-Slim Profile

At just under 8 inches tall, fits in tight spaces like closet ceilings, soffits, and shallow attics.

Ultra-Slim Profile
Built-In Condensate Pump

Flexible Drainage

Built-In Condensate Pump

Integrated condensate pump lifts water up to 30 inches for flexible unit placement.

Professional Performance

High Static Pressure

Up to 0.5" WC of static pressure pushes air through longer duct runs to supply multiple rooms from a single unit.

High Static Pressure

Advanced Features

Smart Climate Control

  • Independent zone control
  • Ducted multi-room distribution
  • 24-hour programmable timer
  • Turbo mode for rapid cooling/heating
  • Auto mode with intelligent temperature control
  • ECO mode for energy savings

Premium Components

  • High-efficiency rotary compressor
  • Premium indoor blower motors
  • Variable speed fan control
  • R454B eco-friendly refrigerant
  • Fire-proof electrical enclosure
  • High-efficiency heat exchanger

Convenience & Safety

  • Auto-restart after power loss
  • Self-diagnostic system
  • Refrigerant leakage detection
  • Adjustable static pressure
  • Wired or wireless control
  • Temperature display toggle (°C/°F)

Easy Maintenance

  • Front-access filter design
  • Washable air filters
  • Built-in condensate pumps
  • Self-cleaning function
  • Large service access panels
  • Filter change indicator

Operating Temperature Range

Indoor Temperature (Cooling)
62-89°F (17-31°C)
Indoor Temperature (Heating)
32-86°F
Outdoor Temperature (Cooling)
5-131°F (-15 to 55°C)
Outdoor Temperature (Heating)
-13 to 86°F (-25 to 30°C)

Three Hidden 9.5K Air Handlers, One Outdoor Unit — Completely Concealed 3 Zone Comfort

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 9,500 BTU Thin-Air ducted units condition up to 1,425 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 closet.

Three pre-charged R454B linesets ship in the box, so the refrigerant circuit never opens — no vacuum pump, no gauges, and no EPA Section 608 license. The 27,000 BTU multi-zone condenser is rated 22 SEER2 with heating down to -13°F, and one outdoor unit serves all three hidden air handlers from a single circuit and a single set of penetrations.

Why You'll Love It

  • Completely InvisibleAll three air handlers hide above the ceiling or in soffits — only a discreet grille shows in each room, for climate control that looks fully built-in.
  • Multi-Room Per ZoneEach 9,500 BTU ducted unit can feed short runs to two or three registers, so one zone can quietly cover a bedroom plus a bathroom and closet.
  • Right-Sized 9.5K ZonesEach unit covers up to 475 sq ft — ideal for smaller suites and finished rooms where hidden equipment and a modest load make sense.
  • True DIY Refrigerant SideThree pre-charged, quick-connect linesets mean no vacuum pump, no gauges, and no HVAC license — you handle the mounting and short duct runs, the refrigerant work is done.
  • 5-Year Warranty ProtectionZone Air backs all three concealed units and the condenser with 5-year parts and 7-year compressor coverage, plus 30-day returns on uninstalled systems.

What Makes It Different

Concealed ducted systems are almost always sold as full pro installs because they assume a technician will charge three line runs and design the ducting. The Thin-Air keeps the refrigerant side DIY with pre-charged, quick-connect linesets while you handle the mounting and short duct runs.

  • Three Pre-Charged LinesetsEvery line run arrives factory-sealed with R454B inside. Hand-connect the quick-connect fittings on each unit, torque to spec, and the circuit is ready — no vacuum pump, no gauges, no HVAC license.
  • Closely Matched CapacityThree 9,500 BTU units connect 28,500 BTU/h of indoor capacity to a 27,000 BTU/h rated condenser — a standard multi-zone ratio that works because three zones rarely peak together. Both numbers are in the spec table below.
  • One Circuit, Not ThreeA single 230V circuit on a 30A double-pole breaker powers all three hidden air handlers, instead of three separate circuits for three single-zone units.

How It Works

  1. Mount and DuctSecure each concealed air handler above its room — in the ceiling cavity, a soffit, or a closet — and connect short supply runs to the discreet grilles. Set the outdoor unit on a pad or bracket and route the three pre-charged linesets.
  2. Connect and CheckHand-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 PairWire the condenser to a dedicated 208–230V circuit (a licensed electrician is recommended for the disconnect box), then set up each zone on its wired controller or the WiFi app.

Who It's For

This 3 zone concealed system is for:

  • Luxury homes, historic renovations, and finished spaces where all equipment must stay out of sight
  • DIYers comfortable mounting hidden handlers and running short duct runs, who want to skip the refrigerant work
  • Three smaller suites or rooms around 350–475 sq ft each, some feeding more than one register
  • Cold climate homeowners who need dependable heat in every zone down to -13°F

Need more capacity? The 3 zone 33K (11K×3) concealed system steps each zone up to 550 sq ft.

Frequently Asked Questions

Where do the three air handlers go if nothing shows in the rooms?

Each slim concealed handler hides above the ceiling, inside a soffit, or in a closet, and short duct runs carry air to discreet supply grilles. Only the grille shows in each room, so all three zones look completely built-in.

How much area does each 9,500 BTU zone cover?

Each Thin-Air ducted unit conditions up to 475 sq ft and can feed short runs to two or three registers, so three zones cover up to 1,425 sq ft total.

How can a 27,000 BTU condenser support three 9,500 BTU units?

The outdoor unit is rated 27,000 BTU/h while 28,500 BTU/h of indoor capacity is connected — a standard multi-zone ratio, since three zones rarely peak together. The inverter compressor shifts output to whichever zones are calling.

Do I need an HVAC license to install a concealed 3 zone system?

No. All three pre-charged R454B linesets use hand-tight quick-connect fittings, so the refrigerant circuit stays sealed — no vacuum pump, gauges, or EPA 608 certification. You mount the hidden handlers and short duct runs; a licensed electrician is recommended for the 230V disconnect.
View all FAQs

Three Invisible Zones. One Weekend. Zero Contractors.

Completely hidden comfort in three rooms with one condenser, three pre-charged linesets, and a refrigerant-free DIY install.

Free shipping. 30-day returns on uninstalled systems.