AIRTHERMIA EU-RSJ-09/150RDN7-B1 vs Comfortzone RX20-200
Water heating efficiency ηwh: AIRTHERMIA EU-RSJ-09/150RDN7-B1 122 %, Comfortzone RX20-200 123 %. The AIRTHERMIA EU-RSJ-09/150RDN7-B1 is better on 4 of 7 comparable points.
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Both models in detail
Who wins where
- AIRTHERMIA EU-RSJ-09/150RDN7-B1
- Comfortzone RX20-200
Biggest differences
| Fact | EU-RSJ-09/150RDN7-B1 | RX20-200 |
|---|---|---|
| Annual electricity use, colder climate | 997 kWh | 1,094 kWh |
| ηwh, colder climate | 103 % | 94 % |
| Annual electricity use, warmer climate | 746 kWh | 772 kWh |
| ηwh, warmer climate | 137 % | 133 % |
Score per area = position (0–100) relative to all 450 models in this category; higher is better.
| Technical specifications | AIRTHERMIAEU-RSJ-09/150RDN7-B1 | ComfortzoneRX20-200 |
|---|---|---|
| General | ||
| Load profile | L1 | L2 |
| Efficiency | ||
| Water heating efficiency ηwh | 122 %1 | 123 %✓2 |
| ηwh, colder climate | 103 %✓1 | 94 %2 |
| ηwh, warmer climate | 137 %✓1 | 133 %2 |
| Energy label | A+1 | A+2 |
| Annual electricity use, colder climate | 997 kWh✓1 | 1,094 kWh2 |
| Annual electricity use, warmer climate | 746 kWh✓1 | 772 kWh2 |
| Noise | ||
| Indoor sound power | 56 dB(A)1 | 55 dB(A)✓2 |
| Connectivity & smart | ||
| Smart control | Yes1 | Yes2 |
Frequently asked questions
Which is better: the AIRTHERMIA EU-RSJ-09/150RDN7-B1 or the Comfortzone RX20-200?
Water heating efficiency ηwh: AIRTHERMIA EU-RSJ-09/150RDN7-B1 122 %, Comfortzone RX20-200 123 %. The AIRTHERMIA EU-RSJ-09/150RDN7-B1 is better on 4 of 7 comparable points.
What is the water heating efficiency ηwh of the AIRTHERMIA EU-RSJ-09/150RDN7-B1 and the Comfortzone RX20-200?
AIRTHERMIA EU-RSJ-09/150RDN7-B1: 122 %. Comfortzone RX20-200: 123 %.
Which is better on annual electricity use, colder climate: the AIRTHERMIA EU-RSJ-09/150RDN7-B1 or the Comfortzone RX20-200?
AIRTHERMIA EU-RSJ-09/150RDN7-B1: 997 kWh. Comfortzone RX20-200: 1,094 kWh.
Which is better on ηwh, colder climate: the AIRTHERMIA EU-RSJ-09/150RDN7-B1 or the Comfortzone RX20-200?
AIRTHERMIA EU-RSJ-09/150RDN7-B1: 103 %. Comfortzone RX20-200: 94 %.
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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