Bosch Compress CS3800iAW 13 OE-T (CS3800iAW 13 O-T + AWEi) vs Panasonic Aquarea [WH-SXC09K9E8 + WH-UQZ09KE8]
SCOP (35 °C): Bosch Compress CS3800iAW 13 OE-T (CS3800iAW 13 O-T + AWEi) 5.04, Panasonic Aquarea [WH-SXC09K9E8 + WH-UQZ09KE8] 4.44. The Bosch Compress CS3800iAW 13 OE-T (CS3800iAW 13 O-T + AWEi) is better on 8 of 14 comparable points.
Both models in detail
Who wins where
- Bosch Compress CS3800iAW 13 OE-T (CS3800iAW 13 O-T + AWEi)
- Panasonic Aquarea [WH-SXC09K9E8 + WH-UQZ09KE8]
Biggest differences
| Fact | Compress CS3800iAW 13 OE-T (CS3800iAW 13 O-T + AWEi) | Aquarea [WH-SXC09K9E8 + WH-UQZ09KE8] |
|---|---|---|
| Indoor unit sound power | 34 dB(A) | 46 dB(A) |
| COP A2/W35 | 3.77 | 4.8 |
| Seasonal efficiency ηs 55 °C | 152 % | 125 % |
| SCOP (55 °C) | 3.88 | 3.2 |
| Refrigerant charge | 1.37 kg | 1.6 kg |
| Outdoor unit sound power | 51 dB(A) | 58 dB(A) |
Score per area = position (0–100) relative to all 1350 models in this category; higher is better.
| Technical specifications | BoschCompress CS3800iAW 13 OE-T (CS3800iAW 13 O-T + AWEi) | PanasonicAquarea [WH-SXC09K9E8 + WH-UQZ09KE8] |
|---|---|---|
| Grants & market | ||
| Boiler Upgrade Scheme | £7,500 – £9,000 | £7,500 – £9,000 |
| General | ||
| Type (source) | Air-to-water1 | Air-to-water1 |
| Performance | ||
| Rated output 35 °C | 12.5 kW1 | 13 kW✓1 |
| Rated output 55 °C | 12.5 kW1 | 13 kW✓1 |
| Efficiency | ||
| SCOP (35 °C) | 5.04✓1 | 4.441 |
| SCOP (55 °C) | 3.88✓1 | 3.21 |
| Seasonal efficiency ηs 35 °C | 199 %✓1 | 175 %1 |
| Seasonal efficiency ηs 55 °C | 152 %✓1 | 125 %1 |
| COP A7/W35 | 4.461 | 5.03✓1 |
| COP A2/W35 | 3.771 | 4.8✓1 |
| COP A-7/W35 | 2.991 | 3.25✓1 |
| SEER (cooling) | 4.41✓1 | 4.121 |
| Noise | ||
| Outdoor unit sound power | 51 dB(A)✓1 | 58 dB(A)1 |
| Indoor unit sound power | 34 dB(A)✓1 | 46 dB(A)1 |
| Refrigerant | ||
| Refrigerant | R2901 | R321 |
| Refrigerant charge | 1.37 kg✓1 | 1.6 kg1 |
| Electrical | ||
| Max. power input | 6.2 kW1 | 6.6 kW1 |
| Connectivity & smart | ||
| SG Ready | Yes1 | Yes1 |
Frequently asked questions
Which is better: the Bosch Compress CS3800iAW 13 OE-T (CS3800iAW 13 O-T + AWEi) or the Panasonic Aquarea [WH-SXC09K9E8 + WH-UQZ09KE8]?
SCOP (35 °C): Bosch Compress CS3800iAW 13 OE-T (CS3800iAW 13 O-T + AWEi) 5.04, Panasonic Aquarea [WH-SXC09K9E8 + WH-UQZ09KE8] 4.44. The Bosch Compress CS3800iAW 13 OE-T (CS3800iAW 13 O-T + AWEi) is better on 8 of 14 comparable points.
What is the SCOP (35 °C) of the Bosch Compress CS3800iAW 13 OE-T (CS3800iAW 13 O-T + AWEi) and the Panasonic Aquarea [WH-SXC09K9E8 + WH-UQZ09KE8]?
Bosch Compress CS3800iAW 13 OE-T (CS3800iAW 13 O-T + AWEi): 5.04. Panasonic Aquarea [WH-SXC09K9E8 + WH-UQZ09KE8]: 4.44.
Which is better on indoor unit sound power: the Bosch Compress CS3800iAW 13 OE-T (CS3800iAW 13 O-T + AWEi) or the Panasonic Aquarea [WH-SXC09K9E8 + WH-UQZ09KE8]?
Bosch Compress CS3800iAW 13 OE-T (CS3800iAW 13 O-T + AWEi): 34 dB(A). Panasonic Aquarea [WH-SXC09K9E8 + WH-UQZ09KE8]: 46 dB(A).
Which is better on COP A2/W35: the Bosch Compress CS3800iAW 13 OE-T (CS3800iAW 13 O-T + AWEi) or the Panasonic Aquarea [WH-SXC09K9E8 + WH-UQZ09KE8]?
Panasonic Aquarea [WH-SXC09K9E8 + WH-UQZ09KE8]: 4.8. Bosch Compress CS3800iAW 13 OE-T (CS3800iAW 13 O-T + AWEi): 3.77.
Related comparisons
- BoschCompress CS3800iAW 13 OE-T (CS3800iAW 13 O-T + AWEi)vsPanasonicAquarea [WH-SDC16K9E8 / WH-UDZ16KE8]
- BoschCompress CS3800iAW 13 OE-T (CS3800iAW 13 O-T + AWEi)vsPanasonicAquarea [WH-SXC12K9E8 + WH-UQZ12KE8]
- BoschCompress CS3800iAW 13 OE-T (CS3800iAW 13 O-T + AWEi)vsPanasonicAQUAREA [WH-UXZ16KE8 + WH-SXC16K9E8]
- BoschCompress CS3800iAW 13 OE-T (CS3800iAW 13 O-T + AWEi)vsPanasonicAquarea [WH-ADC16K9E8AN3 / WH-UDZ16KE8]
- BoschCompress CS3800iAW 13 OE-T (CS3800iAW 13 O-T + AWEi)vsPanasonicAQUAREA [WH-WXG16ME8 + WH-CME8]
- BoschCompress CS3800iAW 13 OE-T (CS3800iAW 13 O-T + AWEi)vsBuderusLogaplus M WLW176i-12 AR E (Logatherm WLW-12 MB AR + WLW176i-12 E)
How we collect and check this data →
Sources
- List of eligible heat pumps (BEG) — Bundesamt für Wirtschaft und Ausfuhrkontrolle (BAFA) · accessed 27 Sept 2026