Toshiba Daiseikai 9 3.5kW Inverter Split System
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The Toshiba Daiseikai 9 is a high-performance wall-mounted split system renowned for its exceptional energy efficiency and superior air filtration. Engineered for those who demand the best, this unit utilizes a high-efficiency twin-rotary compressor to deliver rapid cooling and heating while maintaining near-silent operation. The integrated active electrostatic plasma filter captures microscopic particles, ensuring the air in your home remains fresh and clean. This model is perfectly suited for medium-sized living rooms or master bedrooms, providing consistent comfort regardless of the external weather conditions. With its sophisticated design and A+++ energy rating, it is a cost-effective solution for long-term climate management. The unit supports smart control, enabling users to adjust settings remotely, ensuring your home is at the perfect temperature before you arrive. Whether you are looking to combat summer heatwaves or supplement your heating during winter, the Daiseikai 9 offers reliable, high-end performance that stands the test of time.
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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 Toshiba →Official Toshiba manual
The manufacturer's PDF for this model is being sourced and will be downloadable here.
Full Specifications
Description
The Toshiba Daiseikai 9 is a high-performance wall-mounted split system renowned for its exceptional energy efficiency and superior air filtration. Engineered for those who demand the best, this unit utilizes a high-efficiency twin-rotary compressor to deliver rapid cooling and heating while maintaining near-silent operation. The integrated active electrostatic plasma filter captures microscopic particles, ensuring the air in your home remains fresh and clean. This model is perfectly suited for medium-sized living rooms or master bedrooms, providing consistent comfort regardless of the external weather conditions. With its sophisticated design and A+++ energy rating, it is a cost-effective solution for long-term climate management. The unit supports smart control, enabling users to adjust settings remotely, ensuring your home is at the perfect temperature before you arrive. Whether you are looking to combat summer heatwaves or supplement your heating during winter, the Daiseikai 9 offers reliable, high-end performance that stands the test of time.
Compare similar units
Side-by-side specs for other split system ac in a similar BTU range.
Common questions about the Toshiba Daiseikai 9 3.5kW Inverter Split System
How many BTU is the Toshiba Daiseikai 9 3.5kW Inverter Split System?
The Toshiba Daiseikai 9 3.5kW Inverter Split System has a cooling capacity of 12,000 BTU, suitable for Up to 35m².
What room size is the Toshiba Daiseikai 9 3.5kW Inverter Split System suitable for?
The Toshiba Daiseikai 9 3.5kW Inverter Split System is recommended for rooms Up to 35m².
Can I install the Toshiba Daiseikai 9 3.5kW Inverter Split 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 Toshiba Daiseikai 9 3.5kW Inverter Split System smart-home compatible?
Yes — the Toshiba Daiseikai 9 3.5kW Inverter Split System supports Amazon Alexa, Google Home for app and voice control.
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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
90 kWh/yr
EER 14
Standard model
158 kWh/yr
EER 8
Est. saving
£18.31
68 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/toshiba-daiseikai-9-3-5kw-inverter-split-system
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