
AUX 12,000 BTU High-Efficiency Inverter Smart Window Unit
Available to order — dispatched on the lead time shown below.
Trade pricing available — apply or sign in for your trade rate
Retail prices include VAT.
Boasting an impressive 12,000 BTU output, the AUX High-Efficiency Inverter Smart Window Unit represents the pinnacle of self-installable monobloc air conditioning for substantial living areas, commercial cabins, and open-plan studios. Utilising eco-friendly low-GWP R32 refrigerant coupled with an advanced DC inverter compressor, it smoothly regulates capacity to maintain precision temperature stability while delivering superior A+ seasonal efficiency. Integrated Wi-Fi capability provides seamless connectivity with the AUX Home app as well as full compatibility with voice assistants such as Amazon Alexa and Google Home. Its heavy-duty mounting hardware and sealing curtains ensure a robust, thermal-efficient fit inside external window sills or dedicated wall cut-outs. Additional highlights include a high-capacity dehumidification cycle, auto-restart protection following power disruptions, washable dual-layer air filters, and quiet evening operation, ensuring exceptional cooling performance without invasive external refrigeration pipe runs.
Self-install friendly
ModerateThis unit is designed for confident DIYers. Guides & video below.
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 AUX →Official AUX 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 AUX — ask us and we will send the cut sheet with mounting and clearance figures.
Description
Boasting an impressive 12,000 BTU output, the AUX High-Efficiency Inverter Smart Window Unit represents the pinnacle of self-installable monobloc air conditioning for substantial living areas, commercial cabins, and open-plan studios. Utilising eco-friendly low-GWP R32 refrigerant coupled with an advanced DC inverter compressor, it smoothly regulates capacity to maintain precision temperature stability while delivering superior A+ seasonal efficiency. Integrated Wi-Fi capability provides seamless connectivity with the AUX Home app as well as full compatibility with voice assistants such as Amazon Alexa and Google Home. Its heavy-duty mounting hardware and sealing curtains ensure a robust, thermal-efficient fit inside external window sills or dedicated wall cut-outs. Additional highlights include a high-capacity dehumidification cycle, auto-restart protection following power disruptions, washable dual-layer air filters, and quiet evening operation, ensuring exceptional cooling performance without invasive external refrigeration pipe runs.
Compare similar units
Side-by-side specs for other window units in a similar BTU range.
Common questions about the AUX 12,000 BTU High-Efficiency Inverter Smart Window Unit
How many BTU is the AUX 12,000 BTU High-Efficiency Inverter Smart Window Unit?
The AUX 12,000 BTU High-Efficiency Inverter Smart Window Unit has a cooling capacity of 12,000 BTU, suitable for Up to 35m².
What room size is the AUX 12,000 BTU High-Efficiency Inverter Smart Window Unit suitable for?
The AUX 12,000 BTU High-Efficiency Inverter Smart Window Unit is recommended for rooms Up to 35m².
Can I install the AUX 12,000 BTU High-Efficiency Inverter Smart Window Unit myself?
Yes — the AUX 12,000 BTU High-Efficiency Inverter Smart Window Unit is rated as Moderate for self-installation. Guides and video tutorials are available on the product page.
Is the AUX 12,000 BTU High-Efficiency Inverter Smart Window Unit smart-home compatible?
Yes — the AUX 12,000 BTU High-Efficiency Inverter Smart Window Unit supports Amazon Alexa, Google Home for app and voice control.
How long does delivery of the AUX 12,000 BTU High-Efficiency Inverter Smart Window 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.
Filter by brand
Belaco
Stiebel Eltron
Broughton
Reznor
CIAT
Powrmatic
FlaktGroup
Swegon
Suntec
Costway
VYtronIX
Beldray
Clarke
Omega Altalfa
Dantherm
Amcor
Rhoss
Kelvinator
Westinghouse
York
Trane
Lennox
Black + Decker
Honeywell
Senville
AUX
Comfee
Whynter
Viessmann
Rinnai
Aermec
NIBE
Sinclair
Blyss
Fral
Whirlpool
Electrolux
Sharp
Cooper & Hunter
Daitsu
Dimplex
Bosch
Vaillant
Olimpia Splendid
Carrier
Toshiba
Mitsubishi Heavy Industries
DeLonghi
Hitachi
Pro Breeze
Meaco
AEG
Devola
Fujitsu
electriQ
Samsung
Woods
Midea
Haier
TCL
Hisense
LG
Gree
EcoAir
Panasonic
Sealey
Daikin
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
115 kWh/yr
EER 11
Standard model
158 kWh/yr
EER 8
Est. saving
£11.65
43 kWh/yr less
Estimate based on the unit's energy-rating efficiency factor and cooling capacity (12,000 BTU). Actual savings vary with room size, climate and usage patterns.
You may also need

Sealey Air Cooler, Purifier & Humidifier with Remote Control 13L SAC13
Drop-ship available
Sealey Air Cooler, Purifier & Humidifier SAC04
Drop-ship available
Sealey Air Cooler, Heater, Purifier & Humidifier SAC41





















































