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Bosch Climate 4000i 5.3kW Smart Inverter Split System Air Conditioner Heat Pump

In StockEnergy A++

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

£1,388.060

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

2-4 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 Bosch Climate 4000i 5.3kW split system air conditioner and heat pump is built to provide rapid, quiet thermal comfort in larger open-plan living areas, conservatories, and commercial studios. Offering 18,000 BTU cooling and 19,500 BTU heating capacity, this high-performance system delivers reliable climate control even when exterior UK weather drops down to -15°C. Full compatibility with the Bosch HomeCom Easy mobile app enables seamless voice assistant integration with Amazon Alexa and Google Assistant for effortless everyday use. The precision DC inverter compressor adjusts motor speed in real time to optimise energy efficiency, keeping operational costs low while maintaining an A++ seasonal cooling rating. An integrated self-cleaning coil programme and multi-stage carbon air filtration strip airborne particulates, pollen, and bacteria out of circulating air, keeping indoor environments fresh and pristine.

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.

Smart guide

Bosch HomeCom EasyAmazon AlexaGoogle Assistant

Free UK mainland delivery on in-stock units
Manufacturer warranty included
14-day returns

Cooling Capacity

18,000 BTU

Energy Rating

A++

Recommended Room

40-60 m²

Technical documents & videos

Official Bosch manual

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

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

Full Specifications

Cooling Capacity18,000 BTU

Recommended Room Size40-60 m²

Energy RatingA++

Smart HomeBosch HomeCom Easy, Amazon Alexa, Google Assistant

Noise Level—

CategorySplit System AC

SKUBOS-CL4000I-SET-53

Physical dimensions

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

Description

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Cooling Capacity

18,000 BTU

Room Size

40-60 m²

—

Energy Rating

A++

Heating Capable

Yes (heat pump)

Smart Home

Bosch HomeCom Easy, Amazon Alexa, Google Assistant

Yes

Stock

In Stock

Price inc VAT

£1,388.06

£659.97

£548.90

£933.90

Common questions about the Bosch Climate 4000i 5.3kW Smart Inverter Split System Air Conditioner Heat Pump

How many BTU is the Bosch Climate 4000i 5.3kW Smart Inverter Split System Air Conditioner Heat Pump?

The Bosch Climate 4000i 5.3kW Smart Inverter Split System Air Conditioner Heat Pump has a cooling capacity of 18,000 BTU, suitable for 40-60 m².

What room size is the Bosch Climate 4000i 5.3kW Smart Inverter Split System Air Conditioner Heat Pump suitable for?

The Bosch Climate 4000i 5.3kW Smart Inverter Split System Air Conditioner Heat Pump is recommended for rooms 40-60 m².

Can I install the Bosch Climate 4000i 5.3kW Smart Inverter Split System Air Conditioner Heat Pump 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 Bosch Climate 4000i 5.3kW Smart Inverter Split System Air Conditioner Heat Pump smart-home compatible?

Yes — the Bosch Climate 4000i 5.3kW Smart Inverter Split System Air Conditioner Heat Pump supports Bosch HomeCom Easy, Amazon Alexa, Google Assistant for app and voice control.

How long does delivery of the Bosch Climate 4000i 5.3kW Smart Inverter Split System Air Conditioner Heat Pump take?

This unit is 2-4 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.

Electricity tariff (£/kWh)Hours per dayCooling months/year

This unit

146 kWh/yr

EER 13

Standard model

237 kWh/yr

EER 8

Est. saving

£24.65

91 kWh/yr less

Estimate based on the unit's energy-rating efficiency factor and cooling capacity (18,000 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 6 kW heat output used 5 hrs/day over a 150-day UK heating season at £0.27/kWh.

Electric heater / season

£1157

This AC / season

£386

You save / season

£772

~67% less electricity

Heating method	Electricity / season	Cost / season	Efficiency
This heat-pump AC	1429 kWh	£386	Up to 300%
Plug-in electric heater	4286 kWh	£1157	100%
Electric storage heater	4286 kWh	£1157	100%

Heat output estimated from this unit's 19,500 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 £386/season to heat a room vs £1157 for an electric heater - that's £772 saved. https://stockool.store/products/bosch-climate-4000i-5-3kw-smart-inverter-split-system-heat-pump

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