AIRTHERMIA RSJ-15/270RDB10N7-L1 vs Immergas RAPAX 300 V4
Water heating efficiency ηwh: AIRTHERMIA RSJ-15/270RDB10N7-L1 128 %, Immergas RAPAX 300 V4 132 %. Both models win equally often (3 of 7 points).
Last updated: + Add a model
Both models in detail
Who wins where
- AIRTHERMIA RSJ-15/270RDB10N7-L1
- Immergas RAPAX 300 V4
Biggest differences
| Fact | RSJ-15/270RDB10N7-L1 | RAPAX 300 V4 |
|---|---|---|
| Indoor sound power | 51 dB(A) | 54 dB(A) |
| Annual electricity use, colder climate | 1,614 kWh | 1,561 kWh |
| Water heating efficiency ηwh | 128 % | 132 % |
| ηwh, colder climate | 104 % | 107 % |
| ηwh, warmer climate | 144 % | 141 % |
Score per area = position (0–100) relative to all 450 models in this category; higher is better.
| Technical specifications | AIRTHERMIARSJ-15/270RDB10N7-L1 | ImmergasRAPAX 300 V4 |
|---|---|---|
| General | ||
| Load profile | XL1 | XL2 |
| Efficiency | ||
| Water heating efficiency ηwh | 128 %1 | 132 %✓2 |
| ηwh, colder climate | 104 %1 | 107 %✓2 |
| ηwh, warmer climate | 144 %✓1 | 141 %2 |
| Energy label | A+1 | A+2 |
| Annual electricity use, colder climate | 1,614 kWh1 | 1,561 kWh✓2 |
| Annual electricity use, warmer climate | 1,167 kWh✓1 | 1,190 kWh2 |
| Noise | ||
| Indoor sound power | 51 dB(A)✓1 | 54 dB(A)2 |
| Outdoor sound power | 54 dB(A)1 | 54 dB(A)2 |
Frequently asked questions
Which is better: the AIRTHERMIA RSJ-15/270RDB10N7-L1 or the Immergas RAPAX 300 V4?
Water heating efficiency ηwh: AIRTHERMIA RSJ-15/270RDB10N7-L1 128 %, Immergas RAPAX 300 V4 132 %. Both models win equally often (3 of 7 points).
What is the water heating efficiency ηwh of the AIRTHERMIA RSJ-15/270RDB10N7-L1 and the Immergas RAPAX 300 V4?
AIRTHERMIA RSJ-15/270RDB10N7-L1: 128 %. Immergas RAPAX 300 V4: 132 %.
Which is better on indoor sound power: the AIRTHERMIA RSJ-15/270RDB10N7-L1 or the Immergas RAPAX 300 V4?
AIRTHERMIA RSJ-15/270RDB10N7-L1: 51 dB(A). Immergas RAPAX 300 V4: 54 dB(A).
Which is better on annual electricity use, colder climate: the AIRTHERMIA RSJ-15/270RDB10N7-L1 or the Immergas RAPAX 300 V4?
Immergas RAPAX 300 V4: 1,561 kWh. AIRTHERMIA RSJ-15/270RDB10N7-L1: 1,614 kWh.
Related comparisons
- AIRTHERMIARSJ-15/270RDB10N7-L1vsAnselmo ColaDAFNE 260 LT-S
- AIRTHERMIARSJ-15/270RDB10N7-L1vsARISTONNUOS PLUS S2 WI-FI 250 FS 3069791
- AIRTHERMIARSJ-15/270RDB10N7-L1vsATAGENERGION NUOS PLUS S2 WI-FI 250 FS 4057074
- AIRTHERMIARSJ-15/270RDB10N7-L1vsATLANTIC886129
- AIRTHERMIARSJ-15/270RDB10N7-L1vsAUSTRIA EMAIL986153
- AIRTHERMIARSJ-15/270RDB10N7-L1vsBULGAquaHeat Pro 200L
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