AIRTHERMIA RSJ-15/270RDB10N7-L1 vs DAITSU AIHD 300L V4.1
Water heating efficiency ηwh: AIRTHERMIA RSJ-15/270RDB10N7-L1 128 %, DAITSU AIHD 300L V4.1 142 %. The DAITSU AIHD 300L V4.1 is better on 6 of 7 comparable points.
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Both models in detail
Who wins where
- AIRTHERMIA RSJ-15/270RDB10N7-L1
- DAITSU AIHD 300L V4.1
Biggest differences
| Fact | RSJ-15/270RDB10N7-L1 | AIHD 300L V4.1 |
|---|---|---|
| ηwh, colder climate | 104 % | 142 % |
| ηwh, warmer climate | 144 % | 115 % |
| Annual electricity use, warmer climate | 1,167 kWh | 1,030 kWh |
| Annual electricity use, colder climate | 1,614 kWh | 1,450 kWh |
| Water heating efficiency ηwh | 128 % | 142 % |
| Outdoor sound power | 54 dB(A) | 50 dB(A) |
Score per area = position (0–100) relative to all 450 models in this category; higher is better.
| Technical specifications | AIRTHERMIARSJ-15/270RDB10N7-L1 | DAITSUAIHD 300L V4.1 |
|---|---|---|
| General | ||
| Load profile | XL1 | XL2 |
| Efficiency | ||
| Water heating efficiency ηwh | 128 %1 | 142 %✓2 |
| ηwh, colder climate | 104 %1 | 142 %✓2 |
| ηwh, warmer climate | 144 %✓1 | 115 %2 |
| Energy label | A+1 | A+2 |
| Annual electricity use, colder climate | 1,614 kWh1 | 1,450 kWh✓2 |
| Annual electricity use, warmer climate | 1,167 kWh1 | 1,030 kWh✓2 |
| Noise | ||
| Indoor sound power | 51 dB(A)1 | 50 dB(A)✓2 |
| Outdoor sound power | 54 dB(A)1 | 50 dB(A)✓2 |
Frequently asked questions
Which is better: the AIRTHERMIA RSJ-15/270RDB10N7-L1 or the DAITSU AIHD 300L V4.1?
Water heating efficiency ηwh: AIRTHERMIA RSJ-15/270RDB10N7-L1 128 %, DAITSU AIHD 300L V4.1 142 %. The DAITSU AIHD 300L V4.1 is better on 6 of 7 comparable points.
What is the water heating efficiency ηwh of the AIRTHERMIA RSJ-15/270RDB10N7-L1 and the DAITSU AIHD 300L V4.1?
AIRTHERMIA RSJ-15/270RDB10N7-L1: 128 %. DAITSU AIHD 300L V4.1: 142 %.
Which is better on ηwh, colder climate: the AIRTHERMIA RSJ-15/270RDB10N7-L1 or the DAITSU AIHD 300L V4.1?
DAITSU AIHD 300L V4.1: 142 %. AIRTHERMIA RSJ-15/270RDB10N7-L1: 104 %.
Which is better on ηwh, warmer climate: the AIRTHERMIA RSJ-15/270RDB10N7-L1 or the DAITSU AIHD 300L V4.1?
AIRTHERMIA RSJ-15/270RDB10N7-L1: 144 %. DAITSU AIHD 300L V4.1: 115 %.
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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