AIRTHERMIA EU-RSJ-09/150RDN7-B1 vs RHOSS TWCZ-B 200
Water heating efficiency ηwh: AIRTHERMIA EU-RSJ-09/150RDN7-B1 122 %, RHOSS TWCZ-B 200 101 %. The AIRTHERMIA EU-RSJ-09/150RDN7-B1 is better on 6 of 7 comparable points.
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Both models in detail
Who wins where
- AIRTHERMIA EU-RSJ-09/150RDN7-B1
- RHOSS TWCZ-B 200
Biggest differences
| Fact | EU-RSJ-09/150RDN7-B1 | TWCZ-B 200 |
|---|---|---|
| ηwh, warmer climate | 137 % | 107 % |
| Annual electricity use, warmer climate | 746 kWh | 955 kWh |
| Water heating efficiency ηwh | 122 % | 101 % |
| ηwh, colder climate | 103 % | 95 % |
| Annual electricity use, colder climate | 997 kWh | 1,076 kWh |
| Indoor sound power | 56 dB(A) | 58 dB(A) |
Score per area = position (0–100) relative to all 450 models in this category; higher is better.
| Technical specifications | AIRTHERMIAEU-RSJ-09/150RDN7-B1 | RHOSSTWCZ-B 200 |
|---|---|---|
| General | ||
| Load profile | L1 | L2 |
| Efficiency | ||
| Water heating efficiency ηwh | 122 %✓1 | 101 %2 |
| ηwh, colder climate | 103 %✓1 | 95 %2 |
| ηwh, warmer climate | 137 %✓1 | 107 %2 |
| Energy label | A+1 | A2 |
| Annual electricity use, colder climate | 997 kWh✓1 | 1,076 kWh2 |
| Annual electricity use, warmer climate | 746 kWh✓1 | 955 kWh2 |
| 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 TWCZ-B 200?
Water heating efficiency ηwh: AIRTHERMIA EU-RSJ-09/150RDN7-B1 122 %, RHOSS TWCZ-B 200 101 %. The AIRTHERMIA EU-RSJ-09/150RDN7-B1 is better on 6 of 7 comparable points.
What is the water heating efficiency ηwh of the AIRTHERMIA EU-RSJ-09/150RDN7-B1 and the RHOSS TWCZ-B 200?
AIRTHERMIA EU-RSJ-09/150RDN7-B1: 122 %. RHOSS TWCZ-B 200: 101 %.
Which is better on ηwh, warmer climate: the AIRTHERMIA EU-RSJ-09/150RDN7-B1 or the RHOSS TWCZ-B 200?
AIRTHERMIA EU-RSJ-09/150RDN7-B1: 137 %. RHOSS TWCZ-B 200: 107 %.
Which is better on annual electricity use, warmer climate: the AIRTHERMIA EU-RSJ-09/150RDN7-B1 or the RHOSS TWCZ-B 200?
AIRTHERMIA EU-RSJ-09/150RDN7-B1: 746 kWh. RHOSS TWCZ-B 200: 955 kWh.
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How we collect and check this data →
Sources
- European Product Registry for Energy Labelling (EPREL) – water heaters — Europese Commissie · accessed Oct 13, 2026
- European Product Registry for Energy Labelling (EPREL) – water heaters — Europese Commissie · accessed Oct 13, 2026