LG 3.5kW 1-Way Ceiling Cassette System
Trade pricing available — apply or sign in for your trade rate
Retail prices include VAT.
The LG 1-Way Ceiling Cassette is the perfect choice for narrow or restricted ceiling spaces where a traditional 4-way unit might not fit. Its slim, elegant profile allows it to blend discreetly into any interior design, making it ideal for boutique shops, small offices, or residential extensions. Despite its compact size, it delivers powerful cooling and heating performance, ensuring year-round comfort. The unit features advanced airflow control to prevent direct drafts, enhancing user comfort in occupied zones. With integrated Wi-Fi and LG ThinQ support, you can easily manage your indoor climate from anywhere using your smartphone or voice commands. This unit is highly energy-efficient, helping to reduce operational costs while maintaining a consistent, comfortable environment. Professional installation is required for this split-system unit to ensure compliance with UK F-Gas regulations and to guarantee the longevity of the system.
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
Description
The LG 1-Way Ceiling Cassette is the perfect choice for narrow or restricted ceiling spaces where a traditional 4-way unit might not fit. Its slim, elegant profile allows it to blend discreetly into any interior design, making it ideal for boutique shops, small offices, or residential extensions. Despite its compact size, it delivers powerful cooling and heating performance, ensuring year-round comfort. The unit features advanced airflow control to prevent direct drafts, enhancing user comfort in occupied zones. With integrated Wi-Fi and LG ThinQ support, you can easily manage your indoor climate from anywhere using your smartphone or voice commands. This unit is highly energy-efficient, helping to reduce operational costs while maintaining a consistent, comfortable environment. Professional installation is required for this split-system unit to ensure compliance with UK F-Gas regulations and to guarantee the longevity of the system.
Compare similar units
Side-by-side specs for other ceiling cassettes in a similar BTU range.
Common questions about the LG 3.5kW 1-Way Ceiling Cassette System
How many BTU is the LG 3.5kW 1-Way Ceiling Cassette System?
The LG 3.5kW 1-Way Ceiling Cassette System has a cooling capacity of 12,000 BTU, suitable for Up to 35m².
What room size is the LG 3.5kW 1-Way Ceiling Cassette System suitable for?
The LG 3.5kW 1-Way Ceiling Cassette System is recommended for rooms Up to 35m².
Can I install the LG 3.5kW 1-Way Ceiling Cassette 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 LG 3.5kW 1-Way Ceiling Cassette System smart-home compatible?
Yes — the LG 3.5kW 1-Way Ceiling Cassette System supports Google Home, Amazon Alexa for app and voice control.
Filter by brand
Stiebel Eltron
BroughtonReznorFlaktGroup
Clarke
Omega Altalfa
SwegonPowrmaticVYtronIXSuntecBeldrayCostwayCIATDanthermRhossTraneAmcor
WestinghouseKelvinatorYorkLennoxBlack + DeckerHoneywell
Senville
Comfee
AUX
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
AEGDevola
FujitsuelectriQSamsung
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.
Winter heating cost: this AC vs electric heaters
This unit reverses to heat your room in winter. Based on its 4 kW heat output used 5 hrs/day over a 150-day UK heating season at £0.27/kWh.
Electric heater / season
£801
This AC / season
£267
You save / season
£534
~67% less electricity
| Heating method | Electricity / season | Cost / season | Efficiency | Summer cooling |
|---|---|---|---|---|
| This heat-pump AC | 989 kWh | £267 | Up to 300% | |
| Plug-in electric heater | 2967 kWh | £801 | 100% | |
| Electric storage heater | 2967 kWh | £801 | 100% |
Heat output estimated from this unit's 13,500 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 £267/season to heat a room vs £801 for an electric heater - that's £534 saved. https://stockool.store/products/lg-cl12f-n20-3-5kw-one-way-cassette
You may also need
Sealey SAC16000 Portable Air Conditioner/Dehumidifier/Heater
Sealey SAC45 Portable Evaporative Air Cooler 45L
Sealey SAC101 Portable Evaporative Air Cooler 100L
