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Vaillant climaVAIR pro VAI5-025WN 2.5kW Wall-Mounted Inverter Split System
Vaillant

Vaillant climaVAIR pro VAI5-025WN 2.5kW Wall-Mounted Inverter Split System

In StockEnergy A+++

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

£813.430

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

2-4 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 Vaillant climaVAIR pro VAI5-025WN is an ultra-efficient 2.5kW (9,000 BTU) wall-mounted inverter split air conditioning system engineered by the renowned German heating and climate specialist. Designed specifically for domestic bedrooms, studies, and compact modern living spaces, this system delivers dependable, whisper-quiet climate control throughout the year. Featuring advanced DC inverter technology and low-GWP R32 refrigerant, it provides precise room temperature management with exceptional A+++ cooling and A+ heating performance. The unit incorporates Vaillant's intuitive 'I Feel' function, utilising a sensor within the infrared remote control to regulate ambient room temperatures exactly where occupants sit. Built-in smart Wi-Fi connectivity enables seamless remote scheduling via the dedicated smartphone application, while multiple sleep modes prevent unnecessary overnight energy waste. Installation must be conducted by an F-Gas certified HVAC engineer.

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 HomeiOS / Android App
  • Free UK mainland delivery on in-stock units
  • Manufacturer warranty included
  • 14-day returns

Cooling Capacity

9,000 BTU

Energy Rating

A+++

Recommended Room

15-25 m²

Technical documents & videos

More from Vaillant →

Official Vaillant manual

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

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

Full Specifications

Cooling Capacity9,000 BTU
Recommended Room Size15-25 m²
Energy RatingA+++
Smart HomeAmazon Alexa, Google Home, iOS / Android App
Noise Level—
CategorySplit System AC
SKUVAI5-025WNO-KIT

Physical dimensions

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

Description

The Vaillant climaVAIR pro VAI5-025WN is an ultra-efficient 2.5kW (9,000 BTU) wall-mounted inverter split air conditioning system engineered by the renowned German heating and climate specialist. Designed specifically for domestic bedrooms, studies, and compact modern living spaces, this system delivers dependable, whisper-quiet climate control throughout the year. Featuring advanced DC inverter technology and low-GWP R32 refrigerant, it provides precise room temperature management with exceptional A+++ cooling and A+ heating performance. The unit incorporates Vaillant's intuitive 'I Feel' function, utilising a sensor within the infrared remote control to regulate ambient room temperatures exactly where occupants sit. Built-in smart Wi-Fi connectivity enables seamless remote scheduling via the dedicated smartphone application, while multiple sleep modes prevent unnecessary overnight energy waste. Installation must be conducted by an F-Gas certified HVAC engineer.

Compare similar units

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

This Unit
Vaillant climaVAIR pro VAI5-025WN 2.5kW Wall-Mounted Inverter Split System

Vaillant

Vaillant climaVAIR pro VAI5-025WN 2.5kW Wall-Mounted 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
15-25 m²
—
—
—
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, iOS / Android App
Yes
Not built-in
Not built-in
Stock
In Stock
In Stock
In Stock
In Stock
Price inc VAT
£813.43
£384.97
£493.90
£659.97

Common questions about the Vaillant climaVAIR pro VAI5-025WN 2.5kW Wall-Mounted Inverter Split System

How many BTU is the Vaillant climaVAIR pro VAI5-025WN 2.5kW Wall-Mounted Inverter Split System?

The Vaillant climaVAIR pro VAI5-025WN 2.5kW Wall-Mounted Inverter Split System has a cooling capacity of 9,000 BTU, suitable for 15-25 m².

What room size is the Vaillant climaVAIR pro VAI5-025WN 2.5kW Wall-Mounted Inverter Split System suitable for?

The Vaillant climaVAIR pro VAI5-025WN 2.5kW Wall-Mounted Inverter Split System is recommended for rooms 15-25 m².

Can I install the Vaillant climaVAIR pro VAI5-025WN 2.5kW Wall-Mounted 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 Vaillant climaVAIR pro VAI5-025WN 2.5kW Wall-Mounted Inverter Split System smart-home compatible?

Yes — the Vaillant climaVAIR pro VAI5-025WN 2.5kW Wall-Mounted Inverter Split System supports Amazon Alexa, Google Home, iOS / Android App for app and voice control.

How long does delivery of the Vaillant climaVAIR pro VAI5-025WN 2.5kW Wall-Mounted Inverter Split System take?

This unit is 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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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

£567

This AC / season

£189

You save / season

£378

~67% less electricity

Heating methodElectricity / seasonCost / seasonEfficiencySummer cooling
This heat-pump AC700 kWh£189Up to 300%
Plug-in electric heater2099 kWh£567100%
Electric storage heater2099 kWh£567100%

Heat output estimated from this unit's 9,550 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 £189/season to heat a room vs £567 for an electric heater - that's £378 saved. https://stockool.store/products/vaillant-climavair-pro-vai5-025wn-2-5kw-wall-mounted-inverter-split-system

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