
Sinclair Keyon SIH-12BIK 3.2kW Inverter Wall Mounted Split System
Available to order — dispatched on the lead time shown below.
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Retail prices include VAT.
The Sinclair Keyon SIH-12BIK provides balanced year-round temperature management with a nominal 3.2kW cooling capacity, matching the requirements of typical master bedrooms and standard British living rooms. Driven by DC inverter technology and low-GWP R32 refrigerant, this wall-mounted split unit guarantees superior energy economy with an A++ seasonal cooling efficiency rating. The heat pump functionality produces 3.4kW of warmth, providing an economical alternative to traditional central heating during transitional autumn and chilly winter days. Its built-in Wi-Fi interface lets users adjust ambient conditions, set scheduled timers, and control fan velocities remotely from iOS or Android handhelds. Features include a silent mode designed to preserve nighttime rest, automated air swing louvres for draught-free coverage, and intelligent pre-heating to prevent cold drafts on startup. Robust outdoor engineering ensures flawless operation in external temperatures down to -15°C.
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
Technical documents & videos
More from Sinclair →Official Sinclair 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 Sinclair — ask us and we will send the cut sheet with mounting and clearance figures.
Description
The Sinclair Keyon SIH-12BIK provides balanced year-round temperature management with a nominal 3.2kW cooling capacity, matching the requirements of typical master bedrooms and standard British living rooms. Driven by DC inverter technology and low-GWP R32 refrigerant, this wall-mounted split unit guarantees superior energy economy with an A++ seasonal cooling efficiency rating. The heat pump functionality produces 3.4kW of warmth, providing an economical alternative to traditional central heating during transitional autumn and chilly winter days. Its built-in Wi-Fi interface lets users adjust ambient conditions, set scheduled timers, and control fan velocities remotely from iOS or Android handhelds. Features include a silent mode designed to preserve nighttime rest, automated air swing louvres for draught-free coverage, and intelligent pre-heating to prevent cold drafts on startup. Robust outdoor engineering ensures flawless operation in external temperatures down to -15°C.
Compare similar units
Side-by-side specs for other split system ac in a similar BTU range.
Common questions about the Sinclair Keyon SIH-12BIK 3.2kW Inverter Wall Mounted Split System
How many BTU is the Sinclair Keyon SIH-12BIK 3.2kW Inverter Wall Mounted Split System?
The Sinclair Keyon SIH-12BIK 3.2kW Inverter Wall Mounted Split System has a cooling capacity of 12,000 BTU, suitable for 20-35 m².
What room size is the Sinclair Keyon SIH-12BIK 3.2kW Inverter Wall Mounted Split System suitable for?
The Sinclair Keyon SIH-12BIK 3.2kW Inverter Wall Mounted Split System is recommended for rooms 20-35 m².
Can I install the Sinclair Keyon SIH-12BIK 3.2kW Inverter Wall Mounted 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 Sinclair Keyon SIH-12BIK 3.2kW Inverter Wall Mounted Split System smart-home compatible?
Yes — the Sinclair Keyon SIH-12BIK 3.2kW Inverter Wall Mounted Split System supports Amazon Alexa, Google Assistant for app and voice control.
How long does delivery of the Sinclair Keyon SIH-12BIK 3.2kW Inverter Wall Mounted Split System take?
This unit is 2-4 business 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
£712
This AC / season
£237
You save / season
£475
~67% less electricity
| Heating method | Electricity / season | Cost / season | Efficiency | Summer cooling |
|---|---|---|---|---|
| This heat-pump AC | 879 kWh | £237 | Up to 300% | |
| Plug-in electric heater | 2638 kWh | £712 | 100% | |
| Electric storage heater | 2638 kWh | £712 | 100% |
Heat output estimated from this unit's 12,000 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 £237/season to heat a room vs £712 for an electric heater - that's £475 saved. https://stockool.store/products/sinclair-keyon-sih-12bik-3-2kw-split-system
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