AIRTHERMIA EU-RSJ-09/100RDN7-B1 vs Comfortzone RX20-160
Water heating efficiency ηwh: AIRTHERMIA EU-RSJ-09/100RDN7-B1 111 %, Comfortzone RX20-160 118 %. The AIRTHERMIA EU-RSJ-09/100RDN7-B1 is better on 4 of 7 comparable points.
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Both models in detail
Who wins where
- AIRTHERMIA EU-RSJ-09/100RDN7-B1
- Comfortzone RX20-160
Biggest differences
| Fact | EU-RSJ-09/100RDN7-B1 | RX20-160 |
|---|---|---|
| Annual electricity use, colder climate | 558 kWh | 1,121 kWh |
| Annual electricity use, warmer climate | 451 kWh | 791 kWh |
| ηwh, warmer climate | 114 % | 129 % |
| Water heating efficiency ηwh | 111 % | 118 % |
Score per area = position (0–100) relative to all 450 models in this category; higher is better.
| Technical specifications | AIRTHERMIAEU-RSJ-09/100RDN7-B1 | ComfortzoneRX20-160 |
|---|---|---|
| General | ||
| Load profile | M1 | M2 |
| Efficiency | ||
| Water heating efficiency ηwh | 111 %1 | 118 %✓2 |
| ηwh, colder climate | 92 %✓1 | 91 %2 |
| ηwh, warmer climate | 114 %1 | 129 %✓2 |
| Energy label | A+1 | A+2 |
| Annual electricity use, colder climate | 558 kWh✓1 | 1,121 kWh2 |
| Annual electricity use, warmer climate | 451 kWh✓1 | 791 kWh2 |
| Noise | ||
| Indoor sound power | 54 dB(A)✓1 | 55 dB(A)2 |
| Connectivity & smart | ||
| Smart control | Yes1 | Yes2 |
Frequently asked questions
Which is better: the AIRTHERMIA EU-RSJ-09/100RDN7-B1 or the Comfortzone RX20-160?
Water heating efficiency ηwh: AIRTHERMIA EU-RSJ-09/100RDN7-B1 111 %, Comfortzone RX20-160 118 %. The AIRTHERMIA EU-RSJ-09/100RDN7-B1 is better on 4 of 7 comparable points.
What is the water heating efficiency ηwh of the AIRTHERMIA EU-RSJ-09/100RDN7-B1 and the Comfortzone RX20-160?
AIRTHERMIA EU-RSJ-09/100RDN7-B1: 111 %. Comfortzone RX20-160: 118 %.
Which is better on annual electricity use, colder climate: the AIRTHERMIA EU-RSJ-09/100RDN7-B1 or the Comfortzone RX20-160?
AIRTHERMIA EU-RSJ-09/100RDN7-B1: 558 kWh. Comfortzone RX20-160: 1,121 kWh.
Which is better on annual electricity use, warmer climate: the AIRTHERMIA EU-RSJ-09/100RDN7-B1 or the Comfortzone RX20-160?
AIRTHERMIA EU-RSJ-09/100RDN7-B1: 451 kWh. Comfortzone RX20-160: 791 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