LG Multi Split 4-Port Outdoor Condenser MU4R25.U40 (7.0 kW)
Available to order — dispatched on the lead time shown below.
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Retail prices include VAT.
The LG MU4R25.U40 is a high-performance 4-zone multi split outdoor heat pump condenser, engineered to manage cooling and heating across up to four individual rooms simultaneously. Delivering 7.0 kW (24,000 BTU) cooling output and 7.8 kW of high-efficiency heating, this unit operates with R32 refrigerant to satisfy modern UK eco-design building standards. Its electrostatically coated steel body offers robust corrosion protection against harsh weather, while integrated anti-vibration damping ensures ultra-quiet suburban performance. With independent multi-circuit control, homeowners can independently condition bedrooms, lounge areas, and home workspaces. When paired with smart LG indoor units, the system unlocks smart home convenience with full LG ThinQ app monitoring and voice commands through Alexa and Google Home.
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.
- Free UK mainland delivery on in-stock units
- Manufacturer warranty included
- 14-day returns
Technical documents & videos
More from LG →Official LG manual
The manufacturer's PDF for this model is being sourced and will be downloadable here.
Full Specifications
Physical dimensions
Exact dimensions for this model are being confirmed with LG — ask us and we will send the cut sheet with mounting and clearance figures.
Description
The LG MU4R25.U40 is a high-performance 4-zone multi split outdoor heat pump condenser, engineered to manage cooling and heating across up to four individual rooms simultaneously. Delivering 7.0 kW (24,000 BTU) cooling output and 7.8 kW of high-efficiency heating, this unit operates with R32 refrigerant to satisfy modern UK eco-design building standards. Its electrostatically coated steel body offers robust corrosion protection against harsh weather, while integrated anti-vibration damping ensures ultra-quiet suburban performance. With independent multi-circuit control, homeowners can independently condition bedrooms, lounge areas, and home workspaces. When paired with smart LG indoor units, the system unlocks smart home convenience with full LG ThinQ app monitoring and voice commands through Alexa and Google Home.
Compare similar units
Side-by-side specs for other multi-split system ac in a similar BTU range.
Common questions about the LG Multi Split 4-Port Outdoor Condenser MU4R25.U40 (7.0 kW)
How many BTU is the LG Multi Split 4-Port Outdoor Condenser MU4R25.U40 (7.0 kW)?
The LG Multi Split 4-Port Outdoor Condenser MU4R25.U40 (7.0 kW) has a cooling capacity of 24,000 BTU, suitable for Up to 75m² (total across 4 zones).
What room size is the LG Multi Split 4-Port Outdoor Condenser MU4R25.U40 (7.0 kW) suitable for?
The LG Multi Split 4-Port Outdoor Condenser MU4R25.U40 (7.0 kW) is recommended for rooms Up to 75m² (total across 4 zones).
Can I install the LG Multi Split 4-Port Outdoor Condenser MU4R25.U40 (7.0 kW) 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 LG Multi Split 4-Port Outdoor Condenser MU4R25.U40 (7.0 kW) smart-home compatible?
Yes — the LG Multi Split 4-Port Outdoor Condenser MU4R25.U40 (7.0 kW) supports Amazon Alexa, Google Home for app and voice control.
How long does delivery of the LG Multi Split 4-Port Outdoor Condenser MU4R25.U40 (7.0 kW) take?
This unit is dispatched in 2-4 working days. Delivery is then 1–2 working days to most UK mainland addresses, and 3–6 working days into the EU.
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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
195 kWh/yr
EER 13
Standard model
317 kWh/yr
EER 8
Est. saving
£32.87
122 kWh/yr less
Estimate based on the unit's energy-rating efficiency factor and cooling capacity (24,000 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
£1579
This AC / season
£526
You save / season
£1052
~67% less electricity
| Heating method | Electricity / season | Cost / season | Efficiency | Summer cooling |
|---|---|---|---|---|
| This heat-pump AC | 1949 kWh | £526 | Up to 300% | |
| Plug-in electric heater | 5847 kWh | £1579 | 100% | |
| Electric storage heater | 5847 kWh | £1579 | 100% |
Heat output estimated from this unit's 26,600 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 £526/season to heat a room vs £1579 for an electric heater - that's £1052 saved. https://stockool.store/products/lg-mu4r25-u40-four-zone-outdoor-unit
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