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AIRTHERMIA RSJ-15/270RDB10N7-L1 vs Inventum Sunsmart Heat 260L

Water heating efficiency ηwh: AIRTHERMIA RSJ-15/270RDB10N7-L1 128 %, Inventum Sunsmart Heat 260L 133 %. The Inventum Sunsmart Heat 260L is better on 6 of 7 comparable points.

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Both models in detail

Who wins where

  • AIRTHERMIA RSJ-15/270RDB10N7-L1
  • Inventum Sunsmart Heat 260L

Biggest differences

FactRSJ-15/270RDB10N7-L1Sunsmart Heat 260L
Indoor sound power51 dB(A)55 dB(A)
Water heating efficiency ηwh128 %133 %
Annual electricity use, colder climate1,614 kWh1,576 kWh
Annual electricity use, warmer climate1,167 kWh1,143 kWh
ηwh, warmer climate144 %147 %
All specifications ↓

Score per area = position (0–100) relative to all 450 models in this category; higher is better.

Technical specificationsAIRTHERMIARSJ-15/270RDB10N7-L1InventumSunsmart Heat 260L
General
Load profileXL1XL2
Efficiency
Water heating efficiency ηwh128 %1133 %✓2
ηwh, colder climate104 %1106 %✓2
ηwh, warmer climate144 %1147 %✓2
Energy labelA+1A+2
Annual electricity use, colder climate1,614 kWh11,576 kWh✓2
Annual electricity use, warmer climate1,167 kWh11,143 kWh✓2
Noise
Indoor sound power51 dB(A)✓155 dB(A)2
Outdoor sound power54 dB(A)153 dB(A)✓2

Frequently asked questions

Which is better: the AIRTHERMIA RSJ-15/270RDB10N7-L1 or the Inventum Sunsmart Heat 260L?

Water heating efficiency ηwh: AIRTHERMIA RSJ-15/270RDB10N7-L1 128 %, Inventum Sunsmart Heat 260L 133 %. The Inventum Sunsmart Heat 260L is better on 6 of 7 comparable points.

What is the water heating efficiency ηwh of the AIRTHERMIA RSJ-15/270RDB10N7-L1 and the Inventum Sunsmart Heat 260L?

AIRTHERMIA RSJ-15/270RDB10N7-L1: 128 %. Inventum Sunsmart Heat 260L: 133 %.

Which is better on indoor sound power: the AIRTHERMIA RSJ-15/270RDB10N7-L1 or the Inventum Sunsmart Heat 260L?

AIRTHERMIA RSJ-15/270RDB10N7-L1: 51 dB(A). Inventum Sunsmart Heat 260L: 55 dB(A).

Which is better on annual electricity use, colder climate: the AIRTHERMIA RSJ-15/270RDB10N7-L1 or the Inventum Sunsmart Heat 260L?

Inventum Sunsmart Heat 260L: 1,576 kWh. AIRTHERMIA RSJ-15/270RDB10N7-L1: 1,614 kWh.

How we collect and check this data →

Sources

  1. European Product Registry for Energy Labelling (EPREL) – water heaters — Europese Commissie · accessed Oct 13, 2026
  2. European Product Registry for Energy Labelling (EPREL) – water heaters — Europese Commissie · accessed Oct 13, 2026