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BoschCS3800iAW 10 O-S-H

Bosch CS3800iAW 10 O-S-H
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The Bosch CS3800iAW 10 O-S-H is an air-to-water heat pump with a SCOP of 4.78 (35 °C) and a sound power level of 49 dB(A).1

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SCOP (35 °C)
4.781

Seasonal efficiency: how much heat you get per kWh of electricity across a heating season.

Heating capacity (A7/W35)
9.29kW1
Official source
Outdoor unit sound power
49dB(A)1
Official source
Refrigerant
R2901
Official source
Type (source)
Air-to-water1
Official source

Technical specifications

General
Type (source) Air-to-water1
Performance
Heating capacity (A7/W35) 9.29 kW1
Rated output 35 °C 10 kW1
Rated output 55 °C 10 kW1
Min. outdoor temperature -22 °C1
Efficiency
SCOP (35 °C) 4.781
SCOP (55 °C) 3.81
Seasonal efficiency ηs 35 °C 188 %1
Seasonal efficiency ηs 55 °C 149 %1
Energy label 35 °C A, , , 1
Energy label 55 °C A, , 1
COP A7/W35 4.631
Noise
Outdoor unit sound power 49 dB(A)1
Indoor unit sound power 46 dB(A)1
Refrigerant
Refrigerant R2901
Refrigerant GWP 31
Refrigerant charge 1.37 kg1

Variants

This model is registered in 2 combinations (for example with a different indoor unit or cylinder) with exactly the same performance. All figures on this page apply to each of these types. The part of the type number that differs is in bold; small differences (e.g. cylinder volume or anode) are listed after it:

  • CS3800iAW 10 O-S-H
  • CS3800iAW 10 O-S-H CSH5800iG

Manufacturer documentation

  • Brochure / leaflet — Luft-Wasser-Wärmepumpe Compress 3800i AW – Broschüre (bosch-homecomfort.com, PDF)

External links to Bosch's official website. The manufacturer may change or move documents; where they differ, the manufacturer's latest version applies.

Frequently asked questions

Which refrigerant does the Bosch CS3800iAW 10 O-S-H use?

The Bosch CS3800iAW 10 O-S-H uses R290.1

Sources

  1. Heat Pump Keymark certificates — EHPA / DIN CERTCO (Heat Pump KEYMARK) · accessed 29 Sept 2026