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Haier 3U55S2SR5FA 5.5kW Multi-Split Outdoor Unit

In StockEnergy A++

£1,186.57£1,400.00Save £213.43

Trade pricing available — apply or sign in for your trade rate

Dispatched in 2-3 working days

UK-Wide Delivery

Free UK mainland delivery on in-stock units

🇪🇺 EU Delivery available

Dispatched in 3–7 working days, then 5–10 working days EU transit

Orders under €150 ship VAT-paid at checkout (IOSS, no charges on delivery). Orders of €150 or more ship DDU — import VAT and customs duty are collected by the courier on delivery.

Retail prices include VAT.

The Haier 3U55S2SR5FA multi-split outdoor heat pump condenser provides reliable, energy-efficient heating and cooling for up to three independent indoor rooms from a single exterior unit. Delivering a nominal 5.5kW cooling capacity and 6.8kW heating output, this system utilizes eco-friendly R32 refrigerant alongside advanced DC inverter technology to reduce running costs throughout the UK seasons. It is fully compatible with Haier Expert, Flexis, Revive, and compact cassette indoor units featuring integrated Wi-Fi and hOn smart controls. Ideal for multi-room UK residential homes, small offices, or ground-floor expansions where quiet, discreet outdoor equipment is required without cluttering garden or patio spaces.

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.

Smart guide

Amazon AlexaGoogle Home

Free UK mainland delivery on in-stock units
Manufacturer warranty included
14-day returns

Cooling Capacity

19,000 BTU

Energy Rating

A++

Recommended Room

Up to 55m² total across 3 rooms

Technical documents & videos

Official Haier manual

The manufacturer's PDF for this model is being sourced and will be downloadable here.

All Haier catalogues and rangesMissing a document? Ask our team and we will send it over.

Full Specifications

Cooling Capacity19,000 BTU

Recommended Room SizeUp to 55m² total across 3 rooms

Energy RatingA++

Smart HomeAmazon Alexa, Google Home

Noise Level—

CategoryMulti-Split System AC

SKU3U55S2SR5FA

Physical dimensions

Exact dimensions for this model are being confirmed with Haier — ask us and we will send the cut sheet with mounting and clearance figures.

Description

Compare similar units

Side-by-side specs for other multi-split system ac in a similar BTU range.

This Unit

Haier

Haier 3U55S2SR5FA 5.5kW Multi-Split Outdoor Unit

Mitsubishi Electric

Mitsubishi Electric MXZ-3F54VF Multi-Split Outdoor Unit

Fujitsu

Fujitsu AOYG18KBTA3 18,000 BTU Multi-Split Outdoor Unit

LG Multi F 3-Way Multi Split Outdoor Unit 5.3kW

Cooling Capacity

19,000 BTU

18,400 BTU

18,000 BTU

Room Size

Up to 55m² total across 3 rooms

Up to 75m² total

Up to 60m² total

Up to 65m² total

Energy Rating

A++

A+++

A++

Heating Capable

Yes (heat pump)

Smart Home

Amazon Alexa, Google Home

Google Home, Amazon Alexa

Stock

In Stock

Price inc VAT

£1,186.57

£1,865.67

£1,495.00

£1,470.90

Common questions about the Haier 3U55S2SR5FA 5.5kW Multi-Split Outdoor Unit

How many BTU is the Haier 3U55S2SR5FA 5.5kW Multi-Split Outdoor Unit?

The Haier 3U55S2SR5FA 5.5kW Multi-Split Outdoor Unit has a cooling capacity of 19,000 BTU, suitable for Up to 55m² total across 3 rooms.

What room size is the Haier 3U55S2SR5FA 5.5kW Multi-Split Outdoor Unit suitable for?

The Haier 3U55S2SR5FA 5.5kW Multi-Split Outdoor Unit is recommended for rooms Up to 55m² total across 3 rooms.

Can I install the Haier 3U55S2SR5FA 5.5kW 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 3U55S2SR5FA 5.5kW Multi-Split Outdoor Unit smart-home compatible?

Yes — the Haier 3U55S2SR5FA 5.5kW Multi-Split Outdoor Unit supports Amazon Alexa, Google Home for app and voice control.

How long does delivery of the Haier 3U55S2SR5FA 5.5kW Multi-Split Outdoor Unit 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.

Annual energy savings estimate

How much this A++-rated unit could save versus a standard C-rated model, based on your usage.

Electricity tariff (£/kWh)Hours per dayCooling months/year

This unit

154 kWh/yr

EER 13

Standard model

251 kWh/yr

EER 8

Est. saving

£26.02

96 kWh/yr less

Estimate based on the unit's energy-rating efficiency factor and cooling capacity (19,000 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 7 kW heat output used 5 hrs/day over a 150-day UK heating season at £0.27/kWh.

Electric heater / season

£1377

This AC / season

£459

You save / season

£918

~67% less electricity

Heating method	Electricity / season	Cost / season	Efficiency
This heat-pump AC	1700 kWh	£459	Up to 300%
Plug-in electric heater	5100 kWh	£1377	100%
Electric storage heater	5100 kWh	£1377	100%

Heat output estimated from this unit's 23,200 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 £459/season to heat a room vs £1377 for an electric heater - that's £918 saved. https://stockool.store/products/haier-3u55s2sr5fa-5-5kw-multi-split-outdoor-unit

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