Multi Split
One outdoor unit serves two to five rooms, with wall, cassette, console and ducted indoor units mixed on one system.
- 8 units
- 4.5 – 12 kW
Multi-split systems connect two to five indoor units to a single outdoor unit. Single split systems cover individual rooms, a light commercial range serves shops, offices and classrooms, and VRF handles whole buildings.
Four ranges
Start with the size of the job: one room, several rooms, one large space, or a whole building.
One outdoor unit serves two to five rooms, with wall, cassette, console and ducted indoor units mixed on one system.
Matched CA‑Smart and CM‑Smart Premium Voice indoor and outdoor units for a single room, office or small shop.
R32 outdoor units from 12,000 to 60,000 Btu/h with cassette, ducted, ceiling-floor and console indoor units.
Mini VRF, modular Mini VRF and the ARV7 full DC inverter platform, with every room controlled on its own.
Compare
| System | Best for | Capacity | Indoor units |
|---|---|---|---|
| Multi split | Two to five rooms from one outdoor unit | 4.5 – 12.0 kW | 2 – 5 per outdoor unit |
| Single split | One room, office or small shop | 2.75 – 7.2 kW | 1 wall unit per outdoor unit |
| Light commercial | Shops, restaurants, classrooms, surgeries and open-plan offices | 12,000 – 60,000 Btu/h | 1 cassette, duct, ceiling-floor or console unit per outdoor unit |
| Mini VRF | Homes, shops and small offices | 8.0 – 18.0 kW cooling | Many, each room controlled on its own |
| ARV7 modular VRF | Offices, hotels, schools, healthcare and retail | 25.2 – 101 kW per module, systems to 144 HP | Up to 61 on a single 36 HP module |
Shared features
Cooling from −15 °C to 52 °C and heating from −22 °C to 24 °C outside, so the same system heats in winter and cools in summer.
Defrost runs only when the coil needs it rather than on a fixed cycle, improving efficiency by around 5% and heating efficiency by up to 20% at low outdoor temperatures.
DC inverter compressors and fan motors with advanced control logic, and a protective multi-layer coating on the outdoor casing.
C‑Series indoor units are tested to EN 14825:2018, with A++ / A+ energy classes across the CA and CC ranges.
FAQs
Quick answers to help you choose between the AUX air conditioning ranges.
A single split pairs one indoor unit with its own outdoor unit, for one room. A multi split connects two to five indoor units to one outdoor unit. VRF serves many indoor units from one outdoor unit, or a bank of modular outdoor units, on a single refrigerant circuit, with every room controlled on its own. Light commercial systems pair one larger indoor unit with an outdoor unit for shops, offices and classrooms.
Start with the size of the job: one room (single split), several rooms (multi split), one large space (light commercial) or a whole building (VRF). Where no installation is possible, portable air conditioners just plug in. Send us the room list and loads and our technical team will size the system.
Yes. The same system heats in winter and cools in summer: cooling works from −15 °C to 52 °C outside and heating from −22 °C to 24 °C. Defrost runs only when the coil needs it, which improves heating efficiency at low outdoor temperatures.
The split range – single split, multi split and light commercial – uses R32. Portable air conditioners and dehumidifiers use the natural refrigerant R290. Mini VRF comes in R410A and R32 versions.
A qualified, certified professional, who commissions the system and signs a commissioning record. After that, air conditioning is serviced every year by an F‑Gas certified engineer.
Yes. AUX air conditioners supplied by AUX UK and installed in UK homes have a 10‑year product warranty from the date of commissioning. To keep the full term, register the system within 90 days of commissioning and have it serviced every year by an F‑Gas certified engineer. The steps are on the warranty page.
Send us the room list and loads and our technical team will size the system and confirm the indoor unit combination.