Carrier Performance 12,000 BTU 1-Way Ceiling Cassette Split System
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Retail prices include VAT.
The Carrier Performance 12,000 BTU 1-Way Ceiling Cassette Split System is an ultra-discreet climate control option specifically engineered for spaces where wall mounting is impractical. Fitting neatly between standard ceiling joists, this low-profile cassette features a flush-mount decorative ceiling panel that discharges conditioned air smoothly across living rooms, open hallways, or home studies. Driven by an advanced variable-speed inverter compressor, the heat pump provides both rapid chilling on hot summer afternoons and gentle, energy-efficient warmth throughout the cold UK winter. It incorporates an integrated high-lift condensate drain pump to prevent water accumulation and ensure seamless installation routing. With full smart compatibility via Carrier's mobile interface, homeowners can effortlessly govern temperatures and time slots directly from their smartphones, making it an architectural favourite for premium residential refurbishments.
Need it installed?
We'll match you with a local HVAC engineer.
Smart-home ready
Connects natively with the systems below — control by app or voice.
- Free UK mainland delivery on in-stock units
- Manufacturer warranty included
- 14-day returns
In stock now — closest alternatives
This unit is on pre-order. These ship now, matched on cooling capacity and price.
Vaillant climaVAIR plus VAI8-035WN 3.5kW Premium Wall Inverter Split System
Toshiba SHORAI Edge 3.5kW Wall Split System
LG Artcool Mirror 3.5kW Wall Mounted Split System
Gree U-Crown 3.5kW Premium Split System
Technical documents & videos
More from Carrier →Official Carrier manual
The manufacturer's PDF for this model is being sourced and will be downloadable here.
Full Specifications
Physical dimensions
Exact dimensions for this model are being confirmed with Carrier — ask us and we will send the cut sheet with mounting and clearance figures.
Description
The Carrier Performance 12,000 BTU 1-Way Ceiling Cassette Split System is an ultra-discreet climate control option specifically engineered for spaces where wall mounting is impractical. Fitting neatly between standard ceiling joists, this low-profile cassette features a flush-mount decorative ceiling panel that discharges conditioned air smoothly across living rooms, open hallways, or home studies. Driven by an advanced variable-speed inverter compressor, the heat pump provides both rapid chilling on hot summer afternoons and gentle, energy-efficient warmth throughout the cold UK winter. It incorporates an integrated high-lift condensate drain pump to prevent water accumulation and ensure seamless installation routing. With full smart compatibility via Carrier's mobile interface, homeowners can effortlessly govern temperatures and time slots directly from their smartphones, making it an architectural favourite for premium residential refurbishments.
Compare similar units
Side-by-side specs for other split system ac in a similar BTU range.
Common questions about the Carrier Performance 12,000 BTU 1-Way Ceiling Cassette Split System
How many BTU is the Carrier Performance 12,000 BTU 1-Way Ceiling Cassette Split System?
The Carrier Performance 12,000 BTU 1-Way Ceiling Cassette Split System has a cooling capacity of 12,000 BTU, suitable for Up to 35m².
What room size is the Carrier Performance 12,000 BTU 1-Way Ceiling Cassette Split System suitable for?
The Carrier Performance 12,000 BTU 1-Way Ceiling Cassette Split System is recommended for rooms Up to 35m².
Can I install the Carrier Performance 12,000 BTU 1-Way Ceiling Cassette Split System myself?
No — this unit requires professional installation by a qualified F-gas engineer. Use our Find an Installer service to get matched with a local HVAC professional.
Is the Carrier Performance 12,000 BTU 1-Way Ceiling Cassette Split System smart-home compatible?
Yes — the Carrier Performance 12,000 BTU 1-Way Ceiling Cassette Split System supports Carrier Home App, Amazon Alexa, Google Assistant for app and voice control.
How long does delivery of the Carrier Performance 12,000 BTU 1-Way Ceiling Cassette Split System take?
This unit is 3-5 working days. Delivery is then 1–2 working days to most UK mainland addresses, and 3–6 working days into the EU.
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Mitsubishi ElectricAnnual energy savings estimate
How much this A++-rated unit could save versus a standard C-rated model, based on your usage.
This unit
97 kWh/yr
EER 13
Standard model
158 kWh/yr
EER 8
Est. saving
£16.44
61 kWh/yr less
Estimate based on the unit's energy-rating efficiency factor and cooling capacity (12,000 BTU). Actual savings vary with room size, climate and usage patterns.
Winter heating cost: this AC vs electric heaters
This unit reverses to heat your room in winter. Based on its 4 kW heat output used 5 hrs/day over a 150-day UK heating season at £0.27/kWh.
Electric heater / season
£772
This AC / season
£257
You save / season
£514
~67% less electricity
| Heating method | Electricity / season | Cost / season | Efficiency | Summer cooling |
|---|---|---|---|---|
| This heat-pump AC | 953 kWh | £257 | Up to 300% | |
| Plug-in electric heater | 2858 kWh | £772 | 100% | |
| Electric storage heater | 2858 kWh | £772 | 100% |
Heat output estimated from this unit's 13,000 BTU/hr rating. A heat pump moves heat (COP ≈ 3), so it uses about a third of the electricity of a direct-electric heater for the same warmth. Actual savings vary with room size, insulation, tariff and usage. See the full comparison →
Share your savings
This heat-pump AC costs only £257/season to heat a room vs £772 for an electric heater - that's £514 saved. https://stockool.store/products/carrier-performance-12000-btu-1-way-ceiling-cassette-split-system
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