Hisense X3 Series 3.5kW Wall Split System
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Retail prices include VAT.
The Hisense X3 Series 3.5kW wall-mounted split system is a versatile and efficient choice for medium-sized bedrooms or home offices. Engineered with Hi-Nano technology, this unit actively improves indoor air quality by neutralising airborne particles. The system features built-in Wi-Fi, allowing for smart home integration and geofencing capabilities, so your room is perfectly conditioned before you arrive. Its high-efficiency PCB design and self-cleaning functionality ensure long-term reliability and reduced maintenance. The X3 series is designed for the UK climate, offering a robust reverse-cycle heat pump that provides consistent warmth in winter and rapid cooling in summer. With its sleek, modern profile and quiet operation, it integrates discreetly into any interior decor while providing superior climate control and energy savings.
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 Hisense →Official Hisense 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 Hisense — ask us and we will send the cut sheet with mounting and clearance figures.
Description
The Hisense X3 Series 3.5kW wall-mounted split system is a versatile and efficient choice for medium-sized bedrooms or home offices. Engineered with Hi-Nano technology, this unit actively improves indoor air quality by neutralising airborne particles. The system features built-in Wi-Fi, allowing for smart home integration and geofencing capabilities, so your room is perfectly conditioned before you arrive. Its high-efficiency PCB design and self-cleaning functionality ensure long-term reliability and reduced maintenance. The X3 series is designed for the UK climate, offering a robust reverse-cycle heat pump that provides consistent warmth in winter and rapid cooling in summer. With its sleek, modern profile and quiet operation, it integrates discreetly into any interior decor while providing superior climate control and energy savings.
Compare similar units
Side-by-side specs for other split system ac in a similar BTU range.
Common questions about the Hisense X3 Series 3.5kW Wall Split System
How many BTU is the Hisense X3 Series 3.5kW Wall Split System?
The Hisense X3 Series 3.5kW Wall Split System has a cooling capacity of 12,000 BTU, suitable for Up to 35m².
What room size is the Hisense X3 Series 3.5kW Wall Split System suitable for?
The Hisense X3 Series 3.5kW Wall Split System is recommended for rooms Up to 35m².
Can I install the Hisense X3 Series 3.5kW Wall 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 Hisense X3 Series 3.5kW Wall Split System smart-home compatible?
Yes — the Hisense X3 Series 3.5kW Wall Split System supports Amazon Alexa, Google Home for app and voice control.
How long does delivery of the Hisense X3 Series 3.5kW Wall Split System take?
This unit is dispatched in 2-3 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
115 kWh/yr
EER 11
Standard model
158 kWh/yr
EER 8
Est. saving
£11.65
43 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/hisense-x3-series-3-5kw-split-system
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