Winter is coming — your air conditioner heats too. Cut heating bills by up to 67% vs electric heaters.

🇬🇧 Delivering air conditioning across the UK — free UK mainland delivery on in-stock units
Bosch Climate 4000i 3.5kW Smart Inverter Split System Air Conditioner Heat Pump
Bosch

Bosch Climate 4000i 3.5kW Smart Inverter Split System Air Conditioner Heat Pump

In StockEnergy A++
£1,215.000

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

Retail prices include VAT.

Combining premium design aesthetics with advanced energy management, the Bosch Climate 4000i 3.5kW split air conditioner provides 12,000 BTU of cooling and 13,000 BTU of reverse-cycle heating. Engineered for living rooms, modern apartments, and open-plan dining spaces, this system ensures constant comfort while earning an exceptional A++ seasonal cooling efficiency rating. With integrated smart capabilities, users can manage target room temperatures, set weekly operating schedules, and monitor power usage remotely via the Bosch HomeCom Easy smartphone app. The unit's multidirectional 3D swing system guarantees smooth air diffusion throughout the space, while the silent fan profile keeps running sound levels under 21 dB(A). Built-in ionisation and cold-catalyst air filtration eliminate indoor dust, allergens, and common pet odours. The anti-corrosion condenser casing ensures dependable year-round operation in damp UK coastal and suburban climates.

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.

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

Full Specifications

Cooling Capacity12,000 BTU
Recommended Room Size25-38 m²
Energy RatingA++
Smart HomeBosch HomeCom Easy, Amazon Alexa, Google Assistant
Noise Level
CategorySplit System AC
SKUBOS-CL4000I-SET-35

Description

Combining premium design aesthetics with advanced energy management, the Bosch Climate 4000i 3.5kW split air conditioner provides 12,000 BTU of cooling and 13,000 BTU of reverse-cycle heating. Engineered for living rooms, modern apartments, and open-plan dining spaces, this system ensures constant comfort while earning an exceptional A++ seasonal cooling efficiency rating. With integrated smart capabilities, users can manage target room temperatures, set weekly operating schedules, and monitor power usage remotely via the Bosch HomeCom Easy smartphone app. The unit's multidirectional 3D swing system guarantees smooth air diffusion throughout the space, while the silent fan profile keeps running sound levels under 21 dB(A). Built-in ionisation and cold-catalyst air filtration eliminate indoor dust, allergens, and common pet odours. The anti-corrosion condenser casing ensures dependable year-round operation in damp UK coastal and suburban climates.

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

£772

This AC / season

£257

You save / season

£514

~67% less electricity

Heating methodElectricity / seasonCost / seasonEfficiencySummer cooling
This heat-pump AC953 kWh£257Up to 300%
Plug-in electric heater2858 kWh£772100%
Electric storage heater2858 kWh£772100%

Heat output estimated from this unit's 13,000 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 →