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Daikin 3MXM52N9 Multi-Split Outdoor Unit (3 Rooms)
Daikin

Daikin 3MXM52N9 Multi-Split Outdoor Unit (3 Rooms)

In StockEnergy A++
£2,761.190

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

Dispatched in 3-5 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.

Upgrade your home comfort with the Daikin 3MXM52N9, a robust multi-split outdoor unit designed to connect up to three indoor units. This system is ideal for family homes requiring climate control in multiple bedrooms or a combination of living areas and home offices. By centralising your air conditioning needs into one outdoor unit, you maintain a clean, aesthetic exterior while enjoying the luxury of individual temperature control for every room. The unit features Daikin’s industry-leading inverter technology, which adjusts power consumption based on real-time demand, ensuring maximum efficiency and lower running costs. Its quiet operation makes it perfect for densely populated residential areas in the UK. With support for various indoor unit styles, from wall-mounted to concealed ceiling units, this system offers unparalleled design flexibility. Professional installation is mandatory to ensure the system is correctly commissioned and operates at peak efficiency.

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Smart-home ready

Connects natively with the systems below — control by app or voice.

Amazon AlexaGoogle Home
  • Free UK mainland delivery on in-stock units
  • Manufacturer warranty included
  • 14-day returns

Downloads & specs

More from Daikin →

Full Specifications

Cooling Capacity18,000 BTU
Recommended Room SizeUp to 60m² total
Energy RatingA++
Smart HomeAmazon Alexa, Google Home
Noise Level—
CategoryMulti-Split System AC
SKU3MXM52N9

Description

Upgrade your home comfort with the Daikin 3MXM52N9, a robust multi-split outdoor unit designed to connect up to three indoor units. This system is ideal for family homes requiring climate control in multiple bedrooms or a combination of living areas and home offices. By centralising your air conditioning needs into one outdoor unit, you maintain a clean, aesthetic exterior while enjoying the luxury of individual temperature control for every room. The unit features Daikin’s industry-leading inverter technology, which adjusts power consumption based on real-time demand, ensuring maximum efficiency and lower running costs. Its quiet operation makes it perfect for densely populated residential areas in the UK. With support for various indoor unit styles, from wall-mounted to concealed ceiling units, this system offers unparalleled design flexibility. Professional installation is mandatory to ensure the system is correctly commissioned and operates at peak efficiency.

Compare similar units

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

Cooling Capacity
18,000 BTU
18,000 BTU
18,000 BTU
18,000 BTU
Room Size
Up to 60m² total
Up to 65m² total
Up to 60m²
Up to 60m² total
Energy Rating
A++
A++
A++
A++
Heating Capable
Yes (heat pump)
Yes (heat pump)
Yes (heat pump)
Yes (heat pump)
Smart Home
Amazon Alexa, Google Home
Google Home, Amazon Alexa
Google Home, Amazon Alexa
Google Home, Amazon Alexa
Stock
In Stock
In Stock
Out of Stock
In Stock
Price inc VAT
£2,761.19
£1,470.90
£1,722.64
£1,865.67

Annual energy savings estimate

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

This unit

146 kWh/yr

EER 13

Standard model

237 kWh/yr

EER 8

Est. saving

£24.65

91 kWh/yr less

Estimate based on the unit's energy-rating efficiency factor and cooling capacity (18,000 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 6 kW heat output used 5 hrs/day over a 150-day UK heating season at £0.27/kWh.

Electric heater / season

£1187

This AC / season

£396

You save / season

£791

~67% less electricity

Heating methodElectricity / seasonCost / seasonEfficiencySummer cooling
This heat-pump AC1465 kWh£396Up to 300%
Plug-in electric heater4396 kWh£1187100%
Electric storage heater4396 kWh£1187100%

Heat output estimated from this unit's 20,000 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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