Haier 4U75S2SR3FA 7.5kW Multi-Split Outdoor Unit
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The Haier 4U75S2SR3FA is a versatile 7.5kW multi-split outdoor unit, engineered to support up to four indoor units simultaneously. This system is the perfect solution for medium-sized homes or offices where individual temperature control in multiple rooms is required. By consolidating your air conditioning needs into one outdoor unit, you significantly reduce exterior clutter and installation complexity. The unit utilizes eco-friendly R32 refrigerant, aligning with modern environmental standards while providing powerful cooling and heating performance. Its inverter technology ensures that the system adjusts its output based on real-time demand, leading to significant energy savings and a more stable indoor climate. Whether you are installing wall-mounted units in bedrooms or cassettes in a living area, this outdoor unit provides the reliable, quiet, and efficient backbone required for a premium HVAC setup. It is a robust, long-term investment for any property owner seeking comfort and efficiency.
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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 Haier →Manufacturer instructions
The Haier 4U75S2SR3FA multi-split outdoor unit must be installed exclusively by an F-Gas certified professional to ensure safety, validate the manufacturer's warranty, and comply with legal regulations. The unit should be mounted on a stable, level surface or wall bracket capable of supporting its weight, ensuring adequate clearance for airflow and maintenance. Refrigerant piping must be connected by a qualified technician, followed by a mandatory vacuum process to remove moisture and air from the lines before opening the service valves. Electrical connections must be performed according to the provided wiring diagrams, ensuring proper grounding and circuit protection. Once installed, the system requires a thorough leak test and pressure check. First power-on should only occur after all connections are verified and the system is fully commissioned by the certified installer.
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 Haier 4U75S2SR3FA is a versatile 7.5kW multi-split outdoor unit, engineered to support up to four indoor units simultaneously. This system is the perfect solution for medium-sized homes or offices where individual temperature control in multiple rooms is required. By consolidating your air conditioning needs into one outdoor unit, you significantly reduce exterior clutter and installation complexity. The unit utilizes eco-friendly R32 refrigerant, aligning with modern environmental standards while providing powerful cooling and heating performance. Its inverter technology ensures that the system adjusts its output based on real-time demand, leading to significant energy savings and a more stable indoor climate. Whether you are installing wall-mounted units in bedrooms or cassettes in a living area, this outdoor unit provides the reliable, quiet, and efficient backbone required for a premium HVAC setup. It is a robust, long-term investment for any property owner seeking comfort and efficiency.
Compare similar units
Side-by-side specs for other multi-split system ac in a similar BTU range.
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BroughtonReznor
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ClarkeBeldrayVYtronIXCostwaySuntec
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AUX
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NIBE
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Fral
Whirlpool
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Bosch
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Olimpia Splendid
Carrier
Toshiba
Mitsubishi Heavy Industries
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AEGDevola
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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
203 kWh/yr
EER 13
Standard model
330 kWh/yr
EER 8
Est. saving
£34.24
127 kWh/yr less
Estimate based on the unit's energy-rating efficiency factor and cooling capacity (25,000 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 8 kW heat output used 5 hrs/day over a 150-day UK heating season at £0.27/kWh.
Electric heater / season
£1602
This AC / season
£534
You save / season
£1068
~67% less electricity
| Heating method | Electricity / season | Cost / season | Efficiency | Summer cooling |
|---|---|---|---|---|
| This heat-pump AC | 1978 kWh | £534 | Up to 300% | |
| Plug-in electric heater | 5935 kWh | £1602 | 100% | |
| Electric storage heater | 5935 kWh | £1602 | 100% |
Heat output estimated from this unit's 27,000 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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