Samsung FJM AJ040TXJ2KG/EU 4.0kW Dual-Zone Outdoor Unit
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The Samsung FJM AJ040TXJ2KG/EU is a high-efficiency dual-zone outdoor unit designed for residential and light commercial applications. This powerful inverter system allows you to connect up to two indoor units, providing independent climate control for different rooms. Engineered for the UK climate, it features advanced heat pump technology capable of cooling in temperatures up to 46°C and heating in conditions as low as -15°C. Its compact design makes it an ideal solution for properties with limited outdoor space, such as apartments or townhouses with small balconies. With Samsung's smart inverter technology, the unit adjusts its output to maintain your desired temperature precisely, significantly reducing energy consumption compared to traditional systems. It is fully compatible with the SmartThings app, allowing for seamless remote control and monitoring via your smartphone. This unit is a reliable, quiet, and energy-efficient choice for homeowners looking to upgrade their comfort levels across multiple zones.
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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
Downloads & specs
More from Samsung →Manufacturer instructions
The Samsung AJ040TXJ2KG/EU must be installed by a qualified professional in accordance with local regulations. The unit uses R32 refrigerant, which is a fluorinated greenhouse gas; technicians must ensure proper handling and leak testing. Mounting requires a stable, level surface with adequate clearance for airflow. Electrical connections involve a dedicated power supply and communication cables between the outdoor and indoor units. Refrigerant piping must be correctly sized (1/4" liquid and 3/8" gas lines) and vacuum-tested to remove moisture before opening the service valves. After installation, the system requires an auto-addressing procedure to synchronize the indoor units with the outdoor controller. Always refer to the official installation manual for specific torque settings, wiring diagrams, and safety protocols regarding F-gas compliance and system commissioning.
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 Samsung FJM AJ040TXJ2KG/EU is a high-efficiency dual-zone outdoor unit designed for residential and light commercial applications. This powerful inverter system allows you to connect up to two indoor units, providing independent climate control for different rooms. Engineered for the UK climate, it features advanced heat pump technology capable of cooling in temperatures up to 46°C and heating in conditions as low as -15°C. Its compact design makes it an ideal solution for properties with limited outdoor space, such as apartments or townhouses with small balconies. With Samsung's smart inverter technology, the unit adjusts its output to maintain your desired temperature precisely, significantly reducing energy consumption compared to traditional systems. It is fully compatible with the SmartThings app, allowing for seamless remote control and monitoring via your smartphone. This unit is a reliable, quiet, and energy-efficient choice for homeowners looking to upgrade their comfort levels across multiple zones.
Compare similar units
Side-by-side specs for other multi-split system ac in a similar BTU range.
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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
103 kWh/yr
EER 14
Standard model
180 kWh/yr
EER 8
Est. saving
£20.83
77 kWh/yr less
Estimate based on the unit's energy-rating efficiency factor and cooling capacity (13,650 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
£850
This AC / season
£283
You save / season
£567
~67% less electricity
| Heating method | Electricity / season | Cost / season | Efficiency | Summer cooling |
|---|---|---|---|---|
| This heat-pump AC | 1050 kWh | £283 | Up to 300% | |
| Plug-in electric heater | 3150 kWh | £850 | 100% | |
| Electric storage heater | 3150 kWh | £850 | 100% |
Heat output estimated from this unit's 14,330 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 £283/season to heat a room vs £850 for an electric heater - that's £567 saved. https://stockool.store/products/samsung-fjm-aj040txj2kg-eu-4-0kw-dual-zone-outdoor-unit
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