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Heat pump water heaters · INT

Sunex DROPS D4.2

The Sunex DROPS D4.2 is a heat pump water heater with water heating efficiency ηwh 129 %, load profile XL and energy label A+.1

Last updated: Technical specifications⇄ Compare this model
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Water heating efficiency ηwh
129%1
Load profile
XL1
Official source
Energy label
A+1
Official source
Indoor sound power
57dB(A)1
Official source
ηwh, colder climate
129%1
Official source

Technical specifications

General
Load profileXL1
Registered in EPREL2026-061
Efficiency
Water heating efficiency ηwh129 %1
ηwh, colder climate129 %1
ηwh, warmer climate129 %1
Energy labelA+1
Annual electricity use, colder climate1,302 kWh1
Annual electricity use, warmer climate1,302 kWh1
Noise
Indoor sound power57 dB(A)1
Outdoor sound power57 dB(A)1
Connectivity & smart
Off-peak hours onlyNo1

How it ranks

Water heating efficiency ηwh: better than 24% of comparable models in our database (Heat pump water heaters · Load profile XL; n = 159).

Rank 118 of 160

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.

Variants

This model belongs to a series of 7 variants with the same load profile and energy class. The figures on this page apply to the variant above; other variants differ in: Water heating efficiency ηwh 129–143 %. After each type number you can see what differs:

  • DROPS D4.2
  • DROPS D4.2 C
  • DROPS ECO — Water heating efficiency ηwh: 143 %; Annual electricity use, colder climate: 1,169 kWh; Annual electricity use, warmer climate: 1,169 kWh; ηwh, colder climate: 143 %
  • DROPS M4.2
  • GELBI D4.2
  • GELBI D4.2
  • GELBI M4.2

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Frequently asked questions

What is the water heating efficiency ηwh of the Sunex DROPS D4.2?

The water heating efficiency ηwh of the Sunex DROPS D4.2 is 129 %.1

Which load profile does the Sunex DROPS D4.2 have?

The Sunex DROPS D4.2 has load profile XL.1

Which energy label does the Sunex DROPS D4.2 have?

The Sunex DROPS D4.2 has energy label A+.1

What is the indoor sound power of the Sunex DROPS D4.2?

The indoor sound power of the Sunex DROPS D4.2 is 57 dB(A).1

Sources

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