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Bosch Compress 3400i AWS (9.41 kW)

Specifications and technical data

Air Source (ASHP)ResidentialR329.41 kW

Manufacturer	Bosch
Model	Compress 3400i AWS
Model code	CS3400iAWS 10 OR-S
Heat pump type	Air Source (ASHP) All Air Source heat pumps →
Application	Residential All Residential heat pumps →
Refrigerant	R32 All R32 heat pumps →
Mode	Heating & cooling
Heating capacity	9.41 kW
Max heating output (low temp)	6.2 kW at A-10/W35
COP (heating)	4.43 at A7/W35
Operating range (air)	-20 to 45 °C
Heating flow temperature	20–60 °C
Electrical supply	220-240V (Single Phase)
Cooling capacity	6 kW
Max cooling output (high temp)	6 kW at A35/W7
Cooling flow temperature	5–25 °C
EER (cooling)	3.12 at A35/W7
Dimensions (H×W×D)	864 × 975 × 380 mm
Operational Weight	66 kg
Sound power level	59 dB(A) (Sound Power LW(A))
Data added	2026-09-14
Data source	Manufacturer documentation (Bosch)
Verification	Verified by a human

Free data sheet (PDF) →

Check noise at a neighbour’s window (MCS 020 a) →

Bosch Compress 3400i AWS outdoor unit, 10 kW class. R32 refrigerant, 1.3 kg charge. Inverter-driven, 230 V single-phase. Reversible - heating and cooling. Maximum heating water flow temperature 60 °C at the outdoor unit. Sound power 59 dB(A) to EN 12102, with a night-time silent mode.

Where to buy (UK)

UK Supplier	City Plumbing
UK Supplier	BHL
UK Supplier	Eco Wizard
UK Supplier	Plumbing Superstore
UK Supplier	Mr Central Heating

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Data is compiled from manufacturer sources and may contain errors or gaps. Always confirm specifications with the manufacturer before making decisions.