Heat pump water heaters · UK

Oekoboiler ZG 02-05 300l

Oekoboiler ZG 02-05 300l
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The Oekoboiler ZG 02-05 300l is a heat pump water heater with water heating efficiency ηwh 206 %, load profile XL and energy label A+.1

Key figures

Water heating efficiency ηwh
206%1
Load profile
XL1
Official source
Energy label
A+1
Official source
Indoor sound power
46dB(A)1
Official source
ηwh, colder climate
189%1
Official source

Technical specifications

General
Load profileXL1
Registered in EPREL2026-071
Efficiency
Water heating efficiency ηwh206 %1
ηwh, colder climate189 %1
ηwh, warmer climate237 %1
Energy labelA+1
Annual electricity use, colder climate885 kWh1
Annual electricity use, warmer climate708 kWh1
Noise
Indoor sound power46 dB(A)1
Connectivity & smart
Smart controlYes1
Off-peak hours onlyNo1

How it ranks

Water heating efficiency ηwh: better than 98% of comparable models in our database (Heat pump water heaters · Load profile XL; n = 159).

Rank 2 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 is registered in 2 combinations (for example with a different indoor unit or cylinder) with exactly the same performance. All figures on this page apply to each of these types. The part of the type number that differs is in bold; small differences (e.g. cylinder volume or anode) are listed after it:

  • ZG 02-05 300l
  • 02-05 300l — Registered in EPREL: 2025-08

Manufacturer documentation

External links to Oekoboiler's official website. The manufacturer may change or move documents; where they differ, the manufacturer's latest version applies.

Compare with

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Frequently asked questions

What is the water heating efficiency ηwh of the Oekoboiler ZG 02-05 300l?

The water heating efficiency ηwh of the Oekoboiler ZG 02-05 300l is 206 %.1

Which load profile does the Oekoboiler ZG 02-05 300l have?

The Oekoboiler ZG 02-05 300l has load profile XL.1

Which energy label does the Oekoboiler ZG 02-05 300l have?

The Oekoboiler ZG 02-05 300l has energy label A+.1

What is the indoor sound power of the Oekoboiler ZG 02-05 300l?

The indoor sound power of the Oekoboiler ZG 02-05 300l is 46 dB(A).1

Sources

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