UK portable AC stock crisis: Meaco & Midea portable units face industry-wide dispatch delays of several weeks to months. Split, multi-split, window, cassette & accessory lines are unaffected. Read our dispatch & fulfilment update

Winter is coming — your air conditioner heats too. Cut heating bills by up to 67% vs electric heaters.

🇬🇧 Delivering air conditioning across the UK — free UK mainland delivery on in-stock units
Stockool
Mitsubishi Heavy Industries SRK25ZSX-WF / SRC25ZSX-W Diamond Plus 2.5kW Inverter Split System
Mitsubishi Heavy Industries

Mitsubishi Heavy Industries SRK25ZSX-WF / SRC25ZSX-W Diamond Plus 2.5kW Inverter Split System

In StockEnergy A+++

Available to order — dispatched on the lead time shown below.

£1,165.22£1,189.00Save £23.78

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 Diamond Plus SRK25ZSX-WF represents the flagship tier of Mitsubishi Heavy Industries residential engineering, combining award-winning European aesthetics with world-class SEER 9.6 efficiency. Rated at 2.5kW (9,000 BTU) cooling and 3.2kW (10,920 BTU) heating, it suits executive bedrooms and premium studies up to 25m². This system incorporates human motion sensors to detect room occupancy and automatically adjust thermal output, reducing unnecessary power consumption. Integrated Wi-Fi connects smoothly to the Smart M-Air ecosystem, supporting Amazon Alexa and Google Home routines. Advanced filtration with photocatalytic and allergen-deactivating elements maintains hospital-grade indoor air purity while operating as quietly as 19 dB(A). Must be fitted by an F-Gas certified technician.

1

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.

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

Cooling Capacity

9,000 BTU

Energy Rating

A+++

Recommended Room

Up to 25m²

Technical documents & videos

More from Mitsubishi Heavy Industries →

Official Mitsubishi Heavy Industries manual

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

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

Full Specifications

Cooling Capacity9,000 BTU
Recommended Room SizeUp to 25m²
Energy RatingA+++
Smart HomeAmazon Alexa, Google Home
Noise Level—
CategorySplit System AC
SKUSRK25ZSX-WF/SRC25ZSX-W

Physical dimensions

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

Description

The Diamond Plus SRK25ZSX-WF represents the flagship tier of Mitsubishi Heavy Industries residential engineering, combining award-winning European aesthetics with world-class SEER 9.6 efficiency. Rated at 2.5kW (9,000 BTU) cooling and 3.2kW (10,920 BTU) heating, it suits executive bedrooms and premium studies up to 25m². This system incorporates human motion sensors to detect room occupancy and automatically adjust thermal output, reducing unnecessary power consumption. Integrated Wi-Fi connects smoothly to the Smart M-Air ecosystem, supporting Amazon Alexa and Google Home routines. Advanced filtration with photocatalytic and allergen-deactivating elements maintains hospital-grade indoor air purity while operating as quietly as 19 dB(A). Must be fitted by an F-Gas certified technician.

Compare similar units

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

This Unit
Mitsubishi Heavy Industries SRK25ZSX-WF / SRC25ZSX-W Diamond Plus 2.5kW Inverter Split System

Mitsubishi Heavy Industries

Mitsubishi Heavy Industries SRK25ZSX-WF / SRC25ZSX-W Diamond Plus 2.5kW Inverter Split System

Midea Comfee 9000 BTU Smart A++ Wall Mounted Split Air Conditioner with Heat Pump

Midea

Midea Comfee 9000 BTU Smart A++ Wall Mounted Split Air Conditioner with Heat Pump

Samsung A++ 9000 BTU Wall Mounted Air Conditioner with Heat Pump

Samsung

Samsung A++ 9000 BTU Wall Mounted Air Conditioner with Heat Pump

Toshiba RAS9 9000 BTU A++ Wall Mounted Split Air Conditioner with Heat Pump

Toshiba

Toshiba RAS9 9000 BTU A++ Wall Mounted Split Air Conditioner with Heat Pump

Cooling Capacity
9,000 BTU
9,000 BTU
9,000 BTU
9,000 BTU
Room Size
Up to 25m²
—
—
—
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
Yes
Not built-in
Not built-in
Stock
In Stock
In Stock
In Stock
In Stock
Price inc VAT
£1,165.22
£384.97
£493.90
£659.97

Common questions about the Mitsubishi Heavy Industries SRK25ZSX-WF / SRC25ZSX-W Diamond Plus 2.5kW Inverter Split System

How many BTU is the Mitsubishi Heavy Industries SRK25ZSX-WF / SRC25ZSX-W Diamond Plus 2.5kW Inverter Split System?

The Mitsubishi Heavy Industries SRK25ZSX-WF / SRC25ZSX-W Diamond Plus 2.5kW Inverter Split System has a cooling capacity of 9,000 BTU, suitable for Up to 25m².

What room size is the Mitsubishi Heavy Industries SRK25ZSX-WF / SRC25ZSX-W Diamond Plus 2.5kW Inverter Split System suitable for?

The Mitsubishi Heavy Industries SRK25ZSX-WF / SRC25ZSX-W Diamond Plus 2.5kW Inverter Split System is recommended for rooms Up to 25m².

Can I install the Mitsubishi Heavy Industries SRK25ZSX-WF / SRC25ZSX-W Diamond Plus 2.5kW Inverter Split System 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 Mitsubishi Heavy Industries SRK25ZSX-WF / SRC25ZSX-W Diamond Plus 2.5kW Inverter Split System smart-home compatible?

Yes — the Mitsubishi Heavy Industries SRK25ZSX-WF / SRC25ZSX-W Diamond Plus 2.5kW Inverter Split System supports Amazon Alexa, Google Home for app and voice control.

How long does delivery of the Mitsubishi Heavy Industries SRK25ZSX-WF / SRC25ZSX-W Diamond Plus 2.5kW Inverter Split System 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.

Filter by brand

BelacoBelacoStiebel EltronStiebel EltronBroughtonBroughtonReznorReznorCIATCIATPowrmaticPowrmaticFlaktGroupFlaktGroupSwegonSwegonSuntecSuntecCostwayCostwayVYtronIXVYtronIXBeldrayBeldrayClarkeClarkeOmega AltalfaOmega AltalfaDanthermDanthermAmcorAmcorRhossRhossKelvinatorKelvinatorWestinghouseWestinghouseYorkYorkTraneTraneLennoxLennoxBlack + DeckerBlack + DeckerHoneywellHoneywellSenvilleSenvilleAUXAUXComfeeComfeeWhynterWhynterViessmannViessmannRinnaiRinnaiAermecAermecNIBENIBESinclairSinclairBlyssBlyssFralFralWhirlpoolWhirlpoolElectroluxElectroluxSharpSharpCooper & HunterCooper & HunterDaitsuDaitsuDimplexDimplexBoschBoschVaillantVaillantOlimpia SplendidOlimpia SplendidCarrierCarrierToshibaToshibaMitsubishi Heavy IndustriesMitsubishi Heavy IndustriesDeLonghiDeLonghiHitachiHitachiPro BreezePro BreezeMeacoMeacoAEGAEGDevolaDevolaFujitsuFujitsuelectriQelectriQSamsungSamsungWoodsWoodsMideaMideaHaierHaierTCLTCLHisenseHisenseLGLGGreeGreeEcoAirEcoAirPanasonicPanasonicSealeySealeyDaikinDaikinMitsubishi ElectricMitsubishi Electric

Annual energy savings estimate

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

This unit

68 kWh/yr

EER 14

Standard model

119 kWh/yr

EER 8

Est. saving

£13.74

51 kWh/yr less

Estimate based on the unit's energy-rating efficiency factor and cooling capacity (9,000 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 3 kW heat output used 5 hrs/day over a 150-day UK heating season at £0.27/kWh.

Electric heater / season

£648

This AC / season

£216

You save / season

£432

~67% less electricity

Heating methodElectricity / seasonCost / seasonEfficiencySummer cooling
This heat-pump AC800 kWh£216Up to 300%
Plug-in electric heater2400 kWh£648100%
Electric storage heater2400 kWh£648100%

Heat output estimated from this unit's 10,920 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 £216/season to heat a room vs £648 for an electric heater - that's £432 saved. https://stockool.store/products/mhi-srk25zsx-wf-diamond-plus-2-5kw-split

X Post on X WhatsApp

You may also need

Sealey Air Cooler, Purifier & Humidifier with Remote Control 13L SAC13
In Stock
Sealey

Sealey Air Cooler, Purifier & Humidifier with Remote Control 13L SAC13

Drop-ship available
£151.73inc VAT
Dispatched in 1–2 working days
Sealey Air Cooler, Purifier & Humidifier SAC04
In Stock
Sealey

Sealey Air Cooler, Purifier & Humidifier SAC04

Drop-ship available
£92.33inc VAT
Dispatched in 1–2 working days
Sealey Air Cooler, Heater, Purifier & Humidifier SAC41
In Stock
Sealey Heats too

Sealey Air Cooler, Heater, Purifier & Humidifier SAC41

Heats too (heat pump)
Drop-ship available
£237.53inc VAT
Dispatched in 1–2 working days
Sealey Commercial Portable Air Cooler SAC125
In Stock
Sealey

Sealey Commercial Portable Air Cooler SAC125

Drop-ship available
£989.93inc VAT
Dispatched in 1–2 working days

We use cookies to measure how the store is used and to improve it. You can accept all cookies or keep only the essential ones needed to run your cart and checkout. See our privacy policy.