AIRTHERMIA EU-RSJ-09/150RDN7-B1 vs RHOSS TWCTZ-B 200
Water heating efficiency ηwh: AIRTHERMIA EU-RSJ-09/150RDN7-B1 122 %, RHOSS TWCTZ-B 200 132 %. The RHOSS TWCTZ-B 200 is better on 5 of 7 comparable points.
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Both models in detail
Who wins where
- AIRTHERMIA EU-RSJ-09/150RDN7-B1
- RHOSS TWCTZ-B 200
Biggest differences
| Fact | EU-RSJ-09/150RDN7-B1 | TWCTZ-B 200 |
|---|---|---|
| Annual electricity use, colder climate | 997 kWh | 832 kWh |
| ηwh, colder climate | 103 % | 123 % |
| Water heating efficiency ηwh | 122 % | 132 % |
| Indoor sound power | 56 dB(A) | 58 dB(A) |
| ηwh, warmer climate | 137 % | 141 % |
| Annual electricity use, warmer climate | 746 kWh | 725 kWh |
Score per area = position (0–100) relative to all 450 models in this category; higher is better.
| Technical specifications | AIRTHERMIAEU-RSJ-09/150RDN7-B1 | RHOSSTWCTZ-B 200 |
|---|---|---|
| General | ||
| Load profile | L1 | L2 |
| Efficiency | ||
| Water heating efficiency ηwh | 122 %1 | 132 %✓2 |
| ηwh, colder climate | 103 %1 | 123 %✓2 |
| ηwh, warmer climate | 137 %1 | 141 %✓2 |
| Energy label | A+1 | A+2 |
| Annual electricity use, colder climate | 997 kWh1 | 832 kWh✓2 |
| Annual electricity use, warmer climate | 746 kWh1 | 725 kWh✓2 |
| Noise | ||
| Indoor sound power | 56 dB(A)✓1 | 58 dB(A)2 |
| Connectivity & smart | ||
| Smart control | Yes1 | Yes2 |
Frequently asked questions
Which is better: the AIRTHERMIA EU-RSJ-09/150RDN7-B1 or the RHOSS TWCTZ-B 200?
Water heating efficiency ηwh: AIRTHERMIA EU-RSJ-09/150RDN7-B1 122 %, RHOSS TWCTZ-B 200 132 %. The RHOSS TWCTZ-B 200 is better on 5 of 7 comparable points.
What is the water heating efficiency ηwh of the AIRTHERMIA EU-RSJ-09/150RDN7-B1 and the RHOSS TWCTZ-B 200?
AIRTHERMIA EU-RSJ-09/150RDN7-B1: 122 %. RHOSS TWCTZ-B 200: 132 %.
Which is better on annual electricity use, colder climate: the AIRTHERMIA EU-RSJ-09/150RDN7-B1 or the RHOSS TWCTZ-B 200?
RHOSS TWCTZ-B 200: 832 kWh. AIRTHERMIA EU-RSJ-09/150RDN7-B1: 997 kWh.
Which is better on ηwh, colder climate: the AIRTHERMIA EU-RSJ-09/150RDN7-B1 or the RHOSS TWCTZ-B 200?
RHOSS TWCTZ-B 200: 123 %. AIRTHERMIA EU-RSJ-09/150RDN7-B1: 103 %.
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How we collect and check this data →
Sources
- European Product Registry for Energy Labelling (EPREL) – water heaters — Europese Commissie · accessed 13 Oct 2026
- European Product Registry for Energy Labelling (EPREL) – water heaters — Europese Commissie · accessed 13 Oct 2026