Bosch Compress CS8800iAW 11 OMBD-T (B) (CS8800iAW 11 O-T (B) + AWMBi D) vs CTA Aeroheat AH CL 11a
SCOP (35 °C): Bosch Compress CS8800iAW 11 OMBD-T (B) (CS8800iAW 11 O-T (B) + AWMBi D) 5.4, CTA Aeroheat AH CL 11a 5. The Bosch Compress CS8800iAW 11 OMBD-T (B) (CS8800iAW 11 O-T (B) + AWMBi D) is better on 9 of 13 comparable points.
Who wins where
- Bosch Compress CS8800iAW 11 OMBD-T (B) (CS8800iAW 11 O-T (B) + AWMBi D)
- CTA Aeroheat AH CL 11a
Biggest differences
| Fact | Compress CS8800iAW 11 OMBD-T (B) (CS8800iAW 11 O-T (B) + AWMBi D) | Aeroheat AH CL 11a |
|---|---|---|
| Outdoor unit sound power | 45 dB(A) | 49 dB(A) |
| Seasonal efficiency ηs 35 °C | 213 % | 197.1 % |
| SCOP (35 °C) | 5.4 | 5 |
| COP A2/W35 | 4.67 | 4.38 |
| Seasonal efficiency ηs 55 °C | 162 % | 152 % |
| Refrigerant charge | 1.7 kg | 1.6 kg |
Score per area = position (0–100) relative to all 1000 models in this category; higher is better.
| Technical specifications | BoschCompress CS8800iAW 11 OMBD-T (B) (CS8800iAW 11 O-T (B) + AWMBi D) | CTAAeroheat AH CL 11a |
|---|---|---|
| Grants & market | ||
| Boiler Upgrade Scheme | £7,500 – £9,000 | £7,500 – £9,000 |
| Performance | ||
| Rated output 35 °C | 11 kW 1 | 11 kW 1 |
| Rated output 55 °C | 11 kW 1 | 11 kW 1 |
| Efficiency | ||
| SCOP (35 °C) | 5.4 ✓ 1 | 5 1 |
| SCOP (55 °C) | 4.12 ✓ 1 | 3.88 1 |
| Seasonal efficiency ηs 35 °C | 213 % ✓ 1 | 197.1 % 1 |
| Seasonal efficiency ηs 55 °C | 162 % ✓ 1 | 152 % 1 |
| COP A7/W35 | 5.35 ✓ 1 | 5.04 1 |
| COP A2/W35 | 4.67 ✓ 1 | 4.38 1 |
| COP A-7/W35 | 3.13 ✓ 1 | 3.04 1 |
| Noise | ||
| Outdoor unit sound power | 45 dB(A) ✓ 1 | 49 dB(A) 1 |
| Indoor unit sound power | 39 dB(A) ✓ 1 | 40 dB(A) 1 |
| Refrigerant | ||
| Refrigerant | R290 1 | R290 1 |
| Refrigerant charge | 1.7 kg 1 | 1.6 kg ✓ 1 |
| Electrical | ||
| Max. power input | 7.8 kW 1 | 2.17 kW 1 |
| Connectivity & smart | ||
| SG Ready | Yes 1 | Yes 1 |
Sources
- List of eligible heat pumps (BEG) — Bundesamt für Wirtschaft und Ausfuhrkontrolle (BAFA) · accessed 27 Sept 2026