Toshiba’s RAS R32 Multi-Split Inverter range is one of the most adaptable multi room air to air heat pump air conditioning platforms available today. With a broad spread of capacities, 2 to 5 multi-room capabilities, long pipe runs, outstanding efficiency and compatibility with several indoor unit types, the Toshiba RAS system is suitable for homes, apartments, offices, studios, retail units and more.
Modern homes and light commercial environments demand far more than simple heating and cooling, they require flexible zoning, silent operation, premium energy efficiency and the ability to blend climate control into multiple interior designs. Toshiba’s RAS R32 Multi-Split inverter outdoor unit range is engineered precisely for this purpose. Serving anywhere from two to five indoor rooms from a single outdoor system, this multi-split line provides outstanding versatility, quality designs, low running costs and a wide choice of indoor models suitable for bedrooms, lounges, open-plan spaces, loft rooms, offices and retail settings.
Where the traditional single-split system is limited to one indoor and one outdoor pairing, the Toshiba R32 multi-split inverter outdoor units drastically reduces outdoor unit count and space while increasing design flexibility. This makes them ideal for properties where outdoor wall space is limited, aesthetic restrictions apply, or planning rules prevent multiple external condensers. Also, Toshiba’s engineering approach goes a step further, each outdoor unit intelligently modulates power output capacity based on actual room demand, improving seasonal efficiency, reducing unnecessary electrical power draws, reducing noise levels as well as reducing strain on components.
Because these outdoor units support multiple indoor styles, system designers and homeowners can mix and match according to each room’s architecture. High-wall units remain the most popular option due to their efficiency and ease of installation, available in SEIYA, SHORAI Edge Black, cassette, ducted and floor mounted variants. For more discreet installations, Toshiba's cassette units (both 4-way S4 and 2-way U2 formats) deliver balanced airflow across larger rooms and open-plan areas. Floor consoles are a preferred choice for converted lofts, low-wall spaces or rooms without suitable high-wall locations. Meanwhile, slim ducted units provide the most seamless result, hiding the equipment within ceiling voids for a fully concealed finish.
Where the Toshiba range excels is in balancing these technical requirements with genuine real-world usability. All systems operate at impressively low noise levels, with outdoor sound pressure ratings typically between 45–53 dB(A). This makes them suitable for a wide range of properties including flat, semi-detached homes, terraced streets, light commercial applications and balconies. Running costs remain low thanks to Toshiba’s DC Hybrid Inverter heat pump technology, which combines twin-rotary compressor design to achieve precise load matching even at low compressor speeds. This significantly reduces vibration, improves stability and ensures exceptionally quiet performance. As a result, the multi-split outdoor units maintain class-leading SEER and SCOP ratings even under partial-load conditions, a crucial advantage in multi-room installations where not every room is used simultaneously.
Below is a consolidated table combining all key technical information for the entire multi-split outdoor unit range. This includes capacity ratings, efficiency, airflow, noise, pipe length allowances and refrigerant Information.
Toshiba Multi-Split Outdoor Unit Range, Technical Table:
| Model | Rooms | Cooling (kW) | Heating (kW) | SEER | SCOP | Dimensions (mm) | Weight (kg) | Airflow (m³/h) | Sound Pressure (dB(A)) | Pipe Length (Total / Per Unit) | Pipe Height Diff. | Refrigerant (Type / Charge) |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| RAS-2M10G3AVG-E | 2 | 3.3 | 4.0 | 8.60–4.70 A+++ / A++ | 4.0 | 550 × 780 × 290 | 33 | 2100–583 | 51 / 46 | 20 m / 10–20 m | 10 m | R32 / 0.80 kg |
| RAS-2M14G3AVG-E | 2 | 4.0 | 4.4 | 8.70–4.80 A+++ / A++ | 4.1 | 550 × 780 × 290 | 35 | 2250–625 | 52 / 46 | 30 m / 10–26 m | 20 m | R32 / 0.95 kg |
| RAS-2M18G3AVG-E | 2 | 5.2 | 5.6 | 8.50–4.80 A++ / A++ | 4.1 | 630 × 800 × 300 | 43 | 2600–722 | 53 / 47 | 30 m / 15–32 m | 20 m | R32 / 1.20 kg |
| RAS-3M18G3AVG-E | 3 | 5.2 | 6.8 | 8.60–4.80 A+++ / A++ | 4.0 | 630 × 800 × 300 | 44 | 2800–778 | 52 / 46 | 50 m (total) | 20 m | R32 / 1.25 kg |
| RAS-3M26G3AVG-E | 3 | 7.5 | 9.0 | 8.50–4.60 A+++/A++ | 4.1 | 890 × 900 × 320 | 67 | 3700–1028 | 53 / 45 | 50 m (total) | 20 m | R32 / 1.90 kg |
| RAS-4M27G3AVG-E | 4 | 8.0 | 9.0 | 8.30–4.50 A+++/A+ | 4.0 | 890 × 900 × 320 | 63 | 3700–1028 | 54 / 45 | 48 m (total) | 20 m | R32 / 2.05 kg |
| RAS-5M34G3AVG-E | 5 | 10.0 | 12.0 | 7.20–3.40 A++/A+ | 3.8 | 890 × 900 × 320 | 78 | 4400–1222 | 55 / 46 | 68 m (total) | 25 m | R32 / 2.39 kg |
Indoor Unit Options for the Toshiba Multi-Split Range:
Toshiba’s multi-split outdoor systems are designed to work with an exceptionally versatile portfolio of indoor units, giving homeowners, installers and designers the flexibility to tailor each room’s comfort level, noise profile and aesthetic style. Whether the project requires discreet ducted units, sleek wall-mounted systems, compact cassettes or high-performance premium ranges such as SHORAI Edge or DAISEIKAI, the G3 multi-split platform supports almost every indoor type. This wide compatibility ensures that mixed environments, such as open-plan living spaces, bedrooms, home offices, loft conversions and commercial rooms, can all be served by one outdoor unit while still selecting the most suitable indoor models for each zone. From ultra-quiet bedroom applications to high-static ducted solutions for concealed installations,
Full Range of Compatible Indoor Units (Multi-Split):
Toshiba provides one of the most comprehensive multi-split indoor ranges on the UK market:
1. SEIYA High-Wall Indoor Units (Standard R32 Range)
RAS-B07S4KVG-E – 2.0 kW
RAS-B10S4KVG-E – 2.5 kW
RAS-B13S4KVG-E – 3.3 kW
RAS-B18S4KVG-E – 5.0 kW
RAS-B24S4KVG-E – 6.5 kW
2. SHORAI Edge Black High-Wall Series
RAS-B10G3KVSGB-E – 2.5 kW
RAS-B13G3KVSGB-E – 3.5 kW
RAS-B16G3KVSGB-E – 4.6 kW
RAS-B18G3KVSGB-E – 5.0 kW
RAS-B22G3KVSGB-E – 6.0 kW
RAS-B24G3KVSGB-E – 6.5 kW
3. SHORAI Edge White High-Wall Series (spec same as Black, different finish)
RAS-B10G3KVSG-E – 2.5 kW
RAS-B13G3KVSG-E – 3.5 kW
RAS-B16G3KVSG-E – 4.6 kW
4. DAISEIKAI High-Wall Premium Range
RAS-B10S4KVDG-E – 2.5 kW
RAS-B13S4KVDG-E – 3.5 kW
RAS-B18S4KVDG-E – 5.0 kW
RAS-B24S4KVDG-E – 6.5 kW
5. Slim Ducted Indoor Units
M07U2DVG-E – 2.0 kW
M10U2DVG-E – 2.7 kW
M13U2DVG-E – 3.7 kW
M16U2DVG-E – 4.5 kW
M22U2DVG-E – 6.0 kW
M24U2DVG-E – 7.1 kW
6. Compact Cassette 600×600 Units
M10S4MUVG-E – 2.5 kW
M13S4MUVG-E – 3.5 kW
M16S4MUVG-E – 4.6 kW
(With fascia panels UM21P-E, plus optional remote controller AXU31UMP-E)
7. Floor-Mounted Console Units (Bi-Flow)
(These are used less frequently but remain compatible with most multi-split outdoor units.)
