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Sinclair Vision ASH-12BIV 3.5kW Wall Mounted Inverter Split System
Sinclair

Sinclair Vision ASH-12BIV 3.5kW Wall Mounted Inverter Split System

In StockEnergy A++

Available to order — dispatched on the lead time shown below.

£694.030

Trade pricing available — apply or sign in for your trade rate

3-5 business days
UK-Wide Delivery
Free UK mainland delivery on in-stock units
🇪🇺 EU Delivery available
Dispatched in 3–7 working days, then 5–10 working days EU transit
Orders under €150 ship VAT-paid at checkout (IOSS, no charges on delivery). Orders of €150 or more ship DDU — import VAT and customs duty are collected by the courier on delivery.

Retail prices include VAT.

The Sinclair Vision ASH-12BIV is a stylish 3.5kW wall-mounted split system heat pump engineered to combine high thermodynamic efficiency with contemporary interior styling. Rated A++ for cooling and A+ for heating, it delivers efficient climate control for mid-sized bedrooms, garden studios, and open dining rooms. The low-profile indoor unit features an aerodynamic cross-flow turbine fan that moves air smoothly at low revolutions, achieving near-inaudible background sound levels. Advanced DC inverter technology regulates output continuously to prevent energy waste and temperature swings. Remote Wi-Fi functionality enables comprehensive control over running schedules from any smartphone or tablet. The outdoor condenser incorporates anti-corrosion blue-fin protection and works consistently down to -15°C external conditions, offering reliable, low-carbon heat throughout freezing UK winters.

1

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.

Amazon AlexaGoogle Assistant
  • Free UK mainland delivery on in-stock units
  • Manufacturer warranty included
  • 14-day returns

Technical documents & videos

More from Sinclair →

Official Sinclair manual

The manufacturer's PDF for this model is being sourced and will be downloadable here.

All Sinclair catalogues and rangesMissing a document? Ask our team and we will send it over.

Full Specifications

Cooling Capacity12,000 BTU
Recommended Room Size25-35 m²
Energy RatingA++
Smart HomeAmazon Alexa, Google Assistant
Noise Level—
CategorySplit System AC
SKUSIN-ASH12BIV-SET

Physical dimensions

Exact dimensions for this model are being confirmed with Sinclair — ask us and we will send the cut sheet with mounting and clearance figures.

Description

The Sinclair Vision ASH-12BIV is a stylish 3.5kW wall-mounted split system heat pump engineered to combine high thermodynamic efficiency with contemporary interior styling. Rated A++ for cooling and A+ for heating, it delivers efficient climate control for mid-sized bedrooms, garden studios, and open dining rooms. The low-profile indoor unit features an aerodynamic cross-flow turbine fan that moves air smoothly at low revolutions, achieving near-inaudible background sound levels. Advanced DC inverter technology regulates output continuously to prevent energy waste and temperature swings. Remote Wi-Fi functionality enables comprehensive control over running schedules from any smartphone or tablet. The outdoor condenser incorporates anti-corrosion blue-fin protection and works consistently down to -15°C external conditions, offering reliable, low-carbon heat throughout freezing UK winters.

Compare similar units

Side-by-side specs for other split system ac in a similar BTU range.

Cooling Capacity
12,000 BTU
12,000 BTU
12,000 BTU
12,000 BTU
Room Size
25-35 m²
—
—
—
Energy Rating
A++
A++
A++
A++
Heating Capable
Yes (heat pump)
Yes (heat pump)
Yes (heat pump)
Yes (heat pump)
Smart Home
Amazon Alexa, Google Assistant
Yes
Yes
Yes
Stock
In Stock
In Stock
In Stock
In Stock
Price inc VAT
£694.03
£604.97
£417.97
£405.90

Common questions about the Sinclair Vision ASH-12BIV 3.5kW Wall Mounted Inverter Split System

How many BTU is the Sinclair Vision ASH-12BIV 3.5kW Wall Mounted Inverter Split System?

The Sinclair Vision ASH-12BIV 3.5kW Wall Mounted Inverter Split System has a cooling capacity of 12,000 BTU, suitable for 25-35 m².

What room size is the Sinclair Vision ASH-12BIV 3.5kW Wall Mounted Inverter Split System suitable for?

The Sinclair Vision ASH-12BIV 3.5kW Wall Mounted Inverter Split System is recommended for rooms 25-35 m².

Can I install the Sinclair Vision ASH-12BIV 3.5kW Wall Mounted 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 Sinclair Vision ASH-12BIV 3.5kW Wall Mounted Inverter Split System smart-home compatible?

Yes — the Sinclair Vision ASH-12BIV 3.5kW Wall Mounted Inverter Split System supports Amazon Alexa, Google Assistant for app and voice control.

How long does delivery of the Sinclair Vision ASH-12BIV 3.5kW Wall Mounted Inverter Split System take?

This unit is 3-5 business days. Delivery is then 1–2 working days to most UK mainland addresses, and 3–6 working days into the EU.

Annual energy savings estimate

How much this A++-rated unit could save versus a standard C-rated model, based on your usage.

This unit

97 kWh/yr

EER 13

Standard model

158 kWh/yr

EER 8

Est. saving

£16.44

61 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

£742

This AC / season

£247

You save / season

£495

~67% less electricity

Heating methodElectricity / seasonCost / seasonEfficiencySummer cooling
This heat-pump AC916 kWh£247Up to 300%
Plug-in electric heater2748 kWh£742100%
Electric storage heater2748 kWh£742100%

Heat output estimated from this unit's 12,500 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 £247/season to heat a room vs £742 for an electric heater - that's £495 saved. https://stockool.store/products/sinclair-vision-ash-12biv-3-5kw-split-system

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