Zone Air® Airframe 12,000 BTU 21 SEER2 230V Ceiling Cassette Mini-Split Heat Pump AC with Pre-Charged Lineset - Up to 600 Sq Ft

The Discreet 12K Ceiling Cassette That Cools a Whole Room From Overhead — and Installs DIY

The Zone Air Airframe 12,000 BTU ceiling cassette recesses flush into your ceiling, leaving only a clean, low-profile grille visible from the room below. With even 4-way airflow it blankets the entire space in balanced comfort while keeping every wall free for furniture and decor. It is the architectural way to add a ductless mini-split — and because the line set is pre-charged, it is still a true DIY install that saves you $3,000–$5,000 over hiring a contractor.

Pre-charged line sets come with R-454B refrigerant for easy installation, keeping the refrigerant circuit factory-sealed the entire time. You never handle refrigerant, you never need a vacuum pump, and EPA Section 608 certification requirements don't apply. At 12,000 BTU this cassette heats and cools up to 600 sq ft (a great match for rooms in the 350–600 sq ft range), making it right for large bedrooms, living rooms, open offices, and finished additions where you want the equipment hidden.

Because the head recesses up into the ceiling, a cassette install is a step beyond a wall unit — you'll need access above the room through a drop-ceiling tile or open joist bay and clearance in the cavity. But the refrigerant work that normally forces a service call is already finished at the factory. With basic tools, a drill, and the quick-connect line set, most homeowners get it done in a day.

Why You'll Love It

• Hidden In the Ceiling — The Airframe recesses overhead so only a slim grille shows. No wall box, no wasted wall space — just a clean, architectural look and a room that feels finished rather than retrofitted.
• Even 4-Way Airflow — Centered in the ceiling, the 12K cassette pushes conditioned air in all four directions for uniform temperatures with no hot or cold corners — ideal for larger rooms a single wall unit struggles to balance.
• Up to 21 SEER2 Efficiency — A higher SEER rating means better efficiency and lower bills. At up to 21 SEER2 with Energy Star certification, this cassette delivers strong year-round performance, and mini-splits can save up to 30% on energy costs versus traditional HVAC.
• Cold Climate Performance — Reliable heating down to -13°F with enhanced vapor injection that holds approximately 85% of rated heating capacity at 5°F. The room stays comfortable through the coldest stretches of winter.
• 5-Year Warranty Protection — Zone Air covers the Airframe with 5-year parts and 7-year compressor protection plus 30-day returns — peace of mind on a system you installed with your own two hands.

What Makes It Different

Ceiling cassettes are usually treated as pro-only equipment because the industry assumes a technician will vacuum and charge the lines. The Airframe breaks that mold by combining a real recessed cassette with a pre-charged, quick-connect line set, so the flush-mount look finally comes without the contractor invoice.

• Pre-Charged Line Set Technology — The line set arrives factory-sealed with R-454B refrigerant. Hand-connect the quick-connect fittings, torque to spec, and the circuit is live. No vacuum pump, no gauges, no HVAC license — pre-charged line sets eliminate the need for HVAC licensing entirely.
• True DIY, Even for a Cassette — The included mounting frame, detailed instructions, and video support make recessing the head into the ceiling a homeowner-friendly job. You will need ceiling-cavity access above the room and basic tools — a drill, wrench set, and level — and all the refrigerant work is already handled.
• Cold Climate Optimization — Where standard cassettes lose output below freezing, Zone Air's Airframe uses enhanced vapor injection to sustain heat to -13°F. This is a purpose-built cold climate heat pump, not an air conditioner with a reversing valve bolted on.

How It Works

1. Frame and Mount — Open access above the room through a drop-ceiling tile or joist bay, secure the cassette into the opening with the included mounting frame, and place the outdoor unit on a pad or bracket. Route the pre-charged line set up through the ceiling and join both units with the quick-connect fittings. Testing connections with soapy water is mandatory to check for leaks before activation, and proper torque and sealing are essential for leak prevention.
2. Power and Configure — Wire the system to a dedicated 208–230V circuit. A licensed electrician is recommended for the electrical disconnect box to ensure code compliance and safety. Once powered, set up WiFi through the smartphone app in minutes and pair it with your voice assistant.
3. Instant Comfort — The cassette begins heating or cooling right away, sending air evenly to all four corners of the room. Ductless, zoned comfort means no duct losses and no expensive ductwork — you condition exactly the space you choose.

Who It's For

Ideal for:

• Homeowners who want a flush, hidden ceiling cassette instead of a wall-mounted box in a larger living space
• Rooms in the 350–600 sq ft range — living rooms, big bedrooms, open offices, and finished additions
• Spaces with a drop-ceiling or accessible joist bay above, where the cassette has room to recess
• DIYers who want to save thousands by avoiding contractor fees while keeping a clean architectural look

If you want even, whole-room comfort that hides in the ceiling and an install you can finish yourself, the Airframe 12,000 BTU cassette delivers. Energy-efficient mini-splits may qualify for state and utility rebates (the federal 25C tax credit ended for systems placed in service after December 31, 2025) — so the upgrade keeps paying off across years of use.