
Haier 4U85S2SR5FA 8.5kW Multi-Split Outdoor Unit
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The Haier 4U85S2SR5FA is a high-performance 8.5kW multi-split outdoor unit designed to power up to four indoor units simultaneously. This robust system is perfect for larger UK homes or light commercial spaces where individual climate control is required across multiple rooms. By utilising a single outdoor condenser, you significantly reduce the external footprint compared to installing multiple individual systems. Featuring advanced DC inverter technology, this unit intelligently modulates its power output to match the specific cooling or heating demand of each connected room, ensuring optimal energy efficiency and whisper-quiet operation. The system is fully compatible with a variety of Haier indoor units, including wall-mounted, ducted, and cassette styles, offering complete design flexibility. Whether you are looking to maintain a comfortable temperature in a large open-plan living area or need independent control for several bedrooms, this unit provides a reliable, future-proof solution. Its R32 refrigerant compatibility ensures it meets modern environmental standards, making it a smart, long-term investment for any property owner seeking premium, multi-zone climate management.
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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 Haier →Official Haier manual
The manufacturer's PDF for this model is being sourced and will be downloadable here.
Full Specifications
Description
The Haier 4U85S2SR5FA is a high-performance 8.5kW multi-split outdoor unit designed to power up to four indoor units simultaneously. This robust system is perfect for larger UK homes or light commercial spaces where individual climate control is required across multiple rooms. By utilising a single outdoor condenser, you significantly reduce the external footprint compared to installing multiple individual systems. Featuring advanced DC inverter technology, this unit intelligently modulates its power output to match the specific cooling or heating demand of each connected room, ensuring optimal energy efficiency and whisper-quiet operation. The system is fully compatible with a variety of Haier indoor units, including wall-mounted, ducted, and cassette styles, offering complete design flexibility. Whether you are looking to maintain a comfortable temperature in a large open-plan living area or need independent control for several bedrooms, this unit provides a reliable, future-proof solution. Its R32 refrigerant compatibility ensures it meets modern environmental standards, making it a smart, long-term investment for any property owner seeking premium, multi-zone climate management.
Compare similar units
Side-by-side specs for other multi-split system ac in a similar BTU range.
Common questions about the Haier 4U85S2SR5FA 8.5kW Multi-Split Outdoor Unit
How many BTU is the Haier 4U85S2SR5FA 8.5kW Multi-Split Outdoor Unit?
The Haier 4U85S2SR5FA 8.5kW Multi-Split Outdoor Unit has a cooling capacity of 29,000 BTU, suitable for Up to 85m².
What room size is the Haier 4U85S2SR5FA 8.5kW Multi-Split Outdoor Unit suitable for?
The Haier 4U85S2SR5FA 8.5kW Multi-Split Outdoor Unit is recommended for rooms Up to 85m².
Can I install the Haier 4U85S2SR5FA 8.5kW Multi-Split Outdoor Unit 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 Haier 4U85S2SR5FA 8.5kW Multi-Split Outdoor Unit smart-home compatible?
Yes — the Haier 4U85S2SR5FA 8.5kW Multi-Split Outdoor Unit supports Google Home, Amazon Alexa for app and voice control.
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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
235 kWh/yr
EER 13
Standard model
382 kWh/yr
EER 8
Est. saving
£39.72
147 kWh/yr less
Estimate based on the unit's energy-rating efficiency factor and cooling capacity (29,000 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 9 kW heat output used 5 hrs/day over a 150-day UK heating season at £0.27/kWh.
Electric heater / season
£1899
This AC / season
£633
You save / season
£1266
~67% less electricity
| Heating method | Electricity / season | Cost / season | Efficiency | Summer cooling |
|---|---|---|---|---|
| This heat-pump AC | 2345 kWh | £633 | Up to 300% | |
| Plug-in electric heater | 7034 kWh | £1899 | 100% | |
| Electric storage heater | 7034 kWh | £1899 | 100% |
Heat output estimated from this unit's 32,000 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 £633/season to heat a room vs £1899 for an electric heater - that's £1266 saved. https://stockool.store/products/haier-4u85s2sr5fa-8-5kw-multi-split-outdoor-unit
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