Toshiba has one of the clearest residential ranges on the UK market. There are four current wall-mounted families on Toshiba’s UK website: Seiya, Shorai Curve, Haori and Daiseikai 10. Each has a distinct job, and the right choice depends on the room more than the price.
If you’re reading Toshiba Seiya reviews, comparing the Shorai Curve or wondering whether the Haori is worth it, this assessment pulls the manufacturer’s published figures into one place and adds the practical points we look at when we install. We fit Toshiba alongside other leading brands, so this isn’t a brand pitch.
The current Toshiba range at a glance
| Range | Energy class (cool / heat) | Quietest stated | Wi-Fi | Stand-out feature |
|---|---|---|---|---|
| Seiya (S4) | A++ / A++ | 19 dB(A), silent mode | Optional adapter | Value, slim flat panel |
| Shorai Curve | A+++ / A+++ | Not stated on the page | Built in | Matt black or white, Ultra Pure filter |
| Haori | A+++ / A+++ | Less than 19 dB(A) | Built in | Changeable textile cover |
| Daiseikai 10 | A+++ / A+++ | Not stated on the page | Built in | Heating performance to −30°C (stated) |
All four use R32 refrigerant. Toshiba’s pages give energy classes rather than exact SEER and SCOP numbers, which sit in the product data sheets, so we check the figures for your exact size when we quote.
Toshiba Seiya review
The Seiya is Toshiba’s entry point and the model most people ask us about. It is rated A++ for both cooling and heating, and Toshiba quotes 19 dB(A) in silent mode, which is as quiet as many premium units on paper. Model codes run from RAS-B05S4KVG-E to RAS-B24S4KVG-E, so there’s a size for most rooms.
Features include 2D airflow with motorised louvres, a self-cleaning function that helps keep mould off the heat exchanger, a dustless coil coating, a 7-day timer and Comfort Sleep. Toshiba also says its ECO Logic button reduces energy use by 25%; that’s the manufacturer’s claim, and real savings depend on how you use it.
The main compromise is connectivity. Wi-Fi isn’t built in: Toshiba says a Wi-Fi adapter fits inside or outside all models. Our verdict: a well-specified value unit for bedrooms, studies and rooms used mainly in summer. Add the adapter if you want app control.
Toshiba Shorai Curve review
The Shorai Curve steps up to A+++ in both modes, with built-in Wi-Fi and energy monitoring in the app, voice control and a premium remote. It comes in matt black or matt white, which is a genuine advantage in modern interiors where a gloss-white box would stand out.
Air quality gets attention too. The Ultra Pure filter is rated by Toshiba at 94% for PM2.5, and the HADA Care Flow function is designed to keep the air stream off people. The indoor units work with single-split and Toshiba multi-system outdoor units, which helps if you plan to add rooms later. For anyone searching “Toshiba Shorai Curve review”: it’s the model we’d point most homeowners to in this range, balancing top-class efficiency with a sensible footprint. You may still see the older Shorai Edge on sale or already installed; the current UK page lists the Shorai Curve.
Toshiba Haori review
The Haori is the design piece. Its front is a changeable textile cover that peels and sticks into place, in standard and optional colours, so the unit can blend in with a room or be refreshed later. Underneath, it is A+++ for cooling and heating, with factory-integrated Wi-Fi, energy monitoring, Google Home and Alexa control, and indoor operation that Toshiba quotes at less than 19 dB(A). The outdoor unit is listed at down to 39 dB(A).
Filtration is the same strong package: Ultra Pure filter (94% of PM2.5), a plasma ioniser and Toshiba’s Magic Coil, designed to stay clean. The question with the Haori isn’t performance; it’s whether you value the look. In a living room or main bedroom where the unit is on show, many people do.
Daiseikai 10: the cold-weather specialist
The Daiseikai 10 is the one to consider if you plan to use air-to-air heating through the winter. Toshiba states performance down to −30°C, with intelligent defrost and a strong defrost feature, built-in Wi-Fi and a wood or white front cover option. The sizes are 10, 13 and 18 (RAS-B10S4KVPG, B13 and B18). If you’re replacing fossil-fuel heating, read our /air-to-air-heat-pumps/ page and the /boiler-upgrade-scheme-air-to-air-heat-pump-grant/ guide, because the grant has strict conditions.
Want it done properly? AirCon Doctor installs, repairs and services air conditioning and heat pumps across London and the South East, from our base in East Grinstead. We’re an F-Gas certified company and NICEIC approved. Get a fixed-price quote.
What we like
- A clear ladder. Each step up adds something you can see: efficiency, Wi-Fi, design or cold-weather heating.
- A+++ in both modes across the Shorai Curve, Haori and Daiseikai 10.
- Quiet bedroom operation, with 19 dB(A) quoted even on the entry Seiya.
- Good filtration on the upper models, with a stated 94% PM2.5 capture.
- Design options few brands match: matt black, textile and wood-effect fronts.
What to weigh up
- Seiya needs an adapter for app control. Budget for it if you want Wi-Fi.
- Fewer numbers on the web pages. Toshiba publishes classes rather than SEER and SCOP on its range pages, so compare like for like using data sheets for the exact model.
- Warranty length depends on the installer. See below.
Toshiba warranty in the UK
Toshiba’s UK warranty page offers “up to 7-year warranties and labour allowances” through F-gas registered installers who meet its guidelines, with claims made through Toshiba’s commissioning and warranty tool. The detailed conditions sit in Toshiba’s warranty guidelines rather than on the page itself. You get Toshiba’s warranty only; we explain the length and conditions that apply to your installation on your quote, including servicing. We don’t claim any Toshiba accreditation. Compare brands in /air-conditioning-warranty-guide/.
Who each Toshiba range suits
- Seiya: bedrooms, studies and summer-led rooms on a budget.
- Shorai Curve: most living rooms and main bedrooms, especially if you want matt black or built-in Wi-Fi.
- Haori: rooms where the unit is on show and the look matters.
- Daiseikai 10: homes using air-to-air heating as a main heat source through winter.
What we’d check at a site survey
- Heating versus cooling. If you’ll heat all winter, we lean towards the A+++ models and size for the heating load, not just summer cooling.
- Where the unit will be seen. It’s worth deciding on the Haori or a matt finish before we fix the bracket position.
- Future rooms. Shorai Curve and Daiseikai B-code units can connect to multi-system outdoor units. See /multi-split-air-conditioning/.
- Outdoor position and noise near bedrooms and neighbours. Our /air-conditioning-noise-levels-guide/ explains the numbers.
- Wi-Fi signal at the indoor unit, and the adapter if you choose Seiya.
A single room split is £1,200 to £2,200 + VAT with us; a 2-room multi-split is £2,800 to £4,500 + VAT. Both include commissioning and F-Gas documentation.
Quick answers
Is the Toshiba Seiya any good?
Yes, for the money. It is rated A++ for cooling and heating, Toshiba quotes 19 dB(A) in silent mode, and it includes self-cleaning and a 7-day timer. Wi-Fi needs an optional adapter.
Toshiba Shorai Curve or Haori?
Both are A+++ for cooling and heating with built-in Wi-Fi and the Ultra Pure filter. Choose the Haori if you want a changeable textile front; choose the Shorai Curve for a matt black or white finish at a lower price.
Is Toshiba a good air conditioning brand?
Yes. Toshiba offers a clear UK range with A+++ models, low stated noise levels, strong filtration and a cold-climate model rated to −30°C, plus warranties of up to 7 years through qualifying installers.
What refrigerant do Toshiba units use?
The current Seiya, Shorai Curve, Haori and Daiseikai 10 wall-mounted units are all R32 split systems.
Related services
- Toshiba air conditioning
- Air conditioning installation
- Wall-mounted air conditioning
- Air-to-air heat pumps
More advice
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- Best Air Conditioning Units for UK Homes 2026: Buyer’s Guide
- All advice
This guide is general information, checked against the sources linked on 30 October 2026. It isn’t legal, tax or financial advice. Rules, grants and product ranges change, so check the current position before you rely on it.