Viessmann Vitoclima 300-S 3.5kW Flagship Wall-Mounted Split System
Available to order — dispatched on the lead time shown below.
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Retail prices include VAT.
The Viessmann Vitoclima 300-S 3.5kW is Viessmann's flagship premium split air conditioning and heat pump system, delivering optimal luxury, efficiency, and indoor environmental wellness. Achieving top-tier A+++ energy efficiency in both cooling and heating, this system incorporates integrated intelligent Eco Sensors that detect occupant movement and sunlight levels to automatically optimise energy consumption. Its sophisticated IFD high-performance micro-filter and specialised steri-hygiene cycle neutralise 99.9% of bacteria, allergens, and fine particulate matter. In night mode, noise levels drop down to an ultra-silent 15 dB(A), making it the ultimate selection for master bedrooms and luxury apartments. Featuring integrated Wi-Fi connectivity with seamless app management and voice compatibility through Amazon Alexa and Google Assistant, the Vitoclima 300-S unites striking architectural aesthetics with pinnacle German engineering for unmatched everyday comfort in rooms up to 35m².
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 Viessmann →Official Viessmann manual
The manufacturer's PDF for this model is being sourced and will be downloadable here.
Full Specifications
Physical dimensions
Exact dimensions for this model are being confirmed with Viessmann — ask us and we will send the cut sheet with mounting and clearance figures.
Description
The Viessmann Vitoclima 300-S 3.5kW is Viessmann's flagship premium split air conditioning and heat pump system, delivering optimal luxury, efficiency, and indoor environmental wellness. Achieving top-tier A+++ energy efficiency in both cooling and heating, this system incorporates integrated intelligent Eco Sensors that detect occupant movement and sunlight levels to automatically optimise energy consumption. Its sophisticated IFD high-performance micro-filter and specialised steri-hygiene cycle neutralise 99.9% of bacteria, allergens, and fine particulate matter. In night mode, noise levels drop down to an ultra-silent 15 dB(A), making it the ultimate selection for master bedrooms and luxury apartments. Featuring integrated Wi-Fi connectivity with seamless app management and voice compatibility through Amazon Alexa and Google Assistant, the Vitoclima 300-S unites striking architectural aesthetics with pinnacle German engineering for unmatched everyday comfort in rooms up to 35m².
Compare similar units
Side-by-side specs for other split system ac in a similar BTU range.
Common questions about the Viessmann Vitoclima 300-S 3.5kW Flagship Wall-Mounted Split System
How many BTU is the Viessmann Vitoclima 300-S 3.5kW Flagship Wall-Mounted Split System?
The Viessmann Vitoclima 300-S 3.5kW Flagship Wall-Mounted Split System has a cooling capacity of 12,000 BTU, suitable for Up to 35m².
What room size is the Viessmann Vitoclima 300-S 3.5kW Flagship Wall-Mounted Split System suitable for?
The Viessmann Vitoclima 300-S 3.5kW Flagship Wall-Mounted Split System is recommended for rooms Up to 35m².
Can I install the Viessmann Vitoclima 300-S 3.5kW Flagship Wall-Mounted 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 Viessmann Vitoclima 300-S 3.5kW Flagship Wall-Mounted Split System smart-home compatible?
Yes — the Viessmann Vitoclima 300-S 3.5kW Flagship Wall-Mounted Split System supports Amazon Alexa, Google Home for app and voice control.
How long does delivery of the Viessmann Vitoclima 300-S 3.5kW Flagship Wall-Mounted Split System take?
This unit is dispatched in 2-3 working days. Delivery is then 1–2 working days to most UK mainland addresses, and 3–6 working days into the EU.
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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
£831
This AC / season
£277
You save / season
£554
~67% less electricity
| Heating method | Electricity / season | Cost / season | Efficiency | Summer cooling |
|---|---|---|---|---|
| This heat-pump AC | 1026 kWh | £277 | Up to 300% | |
| Plug-in electric heater | 3077 kWh | £831 | 100% | |
| Electric storage heater | 3077 kWh | £831 | 100% |
Heat output estimated from this unit's 14,000 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 £277/season to heat a room vs £831 for an electric heater - that's £554 saved. https://stockool.store/products/viessmann-vitoclima-300-s-3-5kw-flagship-wall-mounted-split-system
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