Hisense J Series 3.5kW Reverse Cycle Split
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The Hisense J Series 3.5kW split system is a versatile, all-season climate control solution designed to handle the unpredictable nature of UK weather. This unit is perfectly sized for medium-sized living rooms or master bedrooms, offering robust cooling and heating capabilities. The J Series is renowned for its energy efficiency and quiet operation, making it a favourite for residential installations. With its integrated Wi-Fi module, users can take full control via the ConnectLife app, allowing for scheduling, mode selection, and temperature adjustments from anywhere. The reverse-cycle heat pump technology is highly effective, extracting heat from the outside air to warm your home efficiently during colder months. The unit also features an Eco Mode to further reduce power consumption, helping you manage energy bills effectively. Its durable construction and R32 refrigerant make it an environmentally conscious choice. Whether you need to cool down during a summer heatwave or add warmth to a chilly evening, the J Series provides consistent, reliable comfort with smart, modern convenience.
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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
Watch & install
Official Hisense product and installation video — see exactly how this unit is set up and fitted.
Manufacturer instructions
Installation of the Hisense J Series split system must be performed by a licensed professional in accordance with local electrical and F-gas regulations. The process involves mounting the indoor unit on a secure, level wall surface using the provided mounting plate, ensuring adequate clearance for airflow. The outdoor unit must be placed in a well-ventilated area, clear of obstructions. Refrigerant piping and electrical interconnecting cables must be routed through a wall penetration, with flare connections tightened to specified torque settings. The system requires a vacuum pump to evacuate the lines before opening the service valves to release refrigerant. After installation, perform a leak test on all joints. First power-on should only occur after verifying all electrical connections and ensuring the system is properly grounded. Refer to the specific technical manual for your region for precise wiring diagrams and pressure requirements.
Fixed units must be installed by a qualified F-gas engineer. Find an installer — we'll match you with a local HVAC professional.
Full Specifications
Description
The Hisense J Series 3.5kW split system is a versatile, all-season climate control solution designed to handle the unpredictable nature of UK weather. This unit is perfectly sized for medium-sized living rooms or master bedrooms, offering robust cooling and heating capabilities. The J Series is renowned for its energy efficiency and quiet operation, making it a favourite for residential installations. With its integrated Wi-Fi module, users can take full control via the ConnectLife app, allowing for scheduling, mode selection, and temperature adjustments from anywhere. The reverse-cycle heat pump technology is highly effective, extracting heat from the outside air to warm your home efficiently during colder months. The unit also features an Eco Mode to further reduce power consumption, helping you manage energy bills effectively. Its durable construction and R32 refrigerant make it an environmentally conscious choice. Whether you need to cool down during a summer heatwave or add warmth to a chilly evening, the J Series provides consistent, reliable comfort with smart, modern convenience.
Compare similar units
Side-by-side specs for other split system ac in a similar BTU range.
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 →
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