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Heat pump water heaters · INT

THERMOR 251140

The THERMOR 251140 is a heat pump water heater with water heating efficiency ηwh 116 %, load profile M and energy label A+.1

Last updated: Technical specifications⇄ Compare this model
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Water heating efficiency ηwh
116%1
Load profile
M1
Official source
Energy label
A+1
Official source
Indoor sound power
42dB(A)1
Official source
ηwh, warmer climate
130%1
Official source

Technical specifications

General
Load profileM1
Registered in EPREL2025-031
Efficiency
Water heating efficiency ηwh116 %1
ηwh, warmer climate130 %1
Energy labelA+1
Annual electricity use, warmer climate396 kWh1
Noise
Indoor sound power42 dB(A)1
Outdoor sound power44 dB(A)1
Connectivity & smart
Smart controlYes1
Off-peak hours onlyNo1

How it ranks

Water heating efficiency ηwh: better than 48% of comparable models in our database (Heat pump water heaters · Load profile M; n = 98).

Rank 49 of 99

Compared with every model on VersusIndex in the same group with a known value; equal values do not count as better. This says nothing about price, installation or reliability.

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Frequently asked questions

What is the water heating efficiency ηwh of the THERMOR 251140?

The water heating efficiency ηwh of the THERMOR 251140 is 116 %.1

Which load profile does the THERMOR 251140 have?

The THERMOR 251140 has load profile M.1

Which energy label does the THERMOR 251140 have?

The THERMOR 251140 has energy label A+.1

What is the indoor sound power of the THERMOR 251140?

The indoor sound power of the THERMOR 251140 is 42 dB(A).1

Sources

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