Heat pump water heaters · UK

Itho Daalderop WPU 6G 18-E M + 150L

The Itho Daalderop WPU 6G 18-E M + 150L is a heat pump water heater with water heating efficiency ηwh 154 %, load profile L and energy label A+.¹

Last updated: 13 October 2026Technical specifications ⇄ Compare this model

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Water heating efficiency ηwh: 154%¹
Load profile: L¹
Official source
Energy label: A+¹
Official source
Indoor sound power: 37dB(A)¹
Official source
ηwh, colder climate: 154%¹
Official source

Technical specifications

General
Load profile	L¹
Registered in EPREL	2026-07¹
Efficiency
Water heating efficiency ηwh	154 %¹
ηwh, colder climate	154 %¹
ηwh, warmer climate	154 %¹
Energy label	A+¹
Annual electricity use, colder climate	665 kWh¹
Annual electricity use, warmer climate	665 kWh¹
Noise
Indoor sound power	37 dB(A)¹
Connectivity & smart
Off-peak hours only	No¹

How it ranks

Water heating efficiency ηwh: better than 82% of comparable models in our database (Heat pump water heaters · Load profile L; n = 175).

Rank 31 of 176

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 42 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 140–155 %. After each type number you can see what differs:

WPU 6G 18-E M + 150L
WPU 18E-5G + WPV 90L 3G — Water heating efficiency ηwh: 155 %; Annual electricity use, colder climate: 662 kWh; Annual electricity use, warmer climate: 662 kWh; ηwh, colder climate: 155 %
WPU 18KC-5G + WPV 90L 3G — Water heating efficiency ηwh: 155 %; Annual electricity use, colder climate: 662 kWh; Annual electricity use, warmer climate: 662 kWh; ηwh, colder climate: 155 %
WPU 6G 18-CE M + 150L
WPU 6G 18-COE M + 150L
WPU 6G 25-CE M + 150L — Indoor sound power: 40 dB(A)
WPU 6G 25-COE M + 150L — Indoor sound power: 40 dB(A)
WPU 6G 25-E M + 150L — Indoor sound power: 40 dB(A)
WPU 6G 35-CE M + 150L — Annual electricity use, colder climate: 664 kWh; Annual electricity use, warmer climate: 664 kWh; Indoor sound power: 45 dB(A)
WPU 6G 35-COE M + 150L — Annual electricity use, colder climate: 664 kWh; Annual electricity use, warmer climate: 664 kWh; Indoor sound power: 45 dB(A)
WPU 6G 35-E M + 150L — Annual electricity use, colder climate: 664 kWh; Annual electricity use, warmer climate: 664 kWh; Indoor sound power: 45 dB(A)
WPU 6G 45-CE M + 150L — Annual electricity use, colder climate: 667 kWh; Annual electricity use, warmer climate: 667 kWh; Indoor sound power: 49 dB(A)
WPU 6G 45-COE M + 150L — Annual electricity use, colder climate: 667 kWh; Annual electricity use, warmer climate: 667 kWh; Indoor sound power: 49 dB(A)
WPU 6G 45-E M + 150L — Annual electricity use, colder climate: 667 kWh; Annual electricity use, warmer climate: 667 kWh; Indoor sound power: 49 dB(A)
WPU 6G 55-CE M + 150L — Water heating efficiency ηwh: 150 %; Annual electricity use, colder climate: 683 kWh; Annual electricity use, warmer climate: 683 kWh; ηwh, colder climate: 150 %
WPU 6G 55-COE M + 150L — Water heating efficiency ηwh: 150 %; Annual electricity use, colder climate: 683 kWh; Annual electricity use, warmer climate: 683 kWh; ηwh, colder climate: 150 %
WPU 6G 55-E M + 150L — Water heating efficiency ηwh: 150 %; Annual electricity use, colder climate: 683 kWh; Annual electricity use, warmer climate: 683 kWh; ηwh, colder climate: 150 %
WPU 6G 65-CE M + 150L — Water heating efficiency ηwh: 145 %; Annual electricity use, colder climate: 704 kWh; Annual electricity use, warmer climate: 704 kWh; ηwh, colder climate: 145 %
WPU 6G 65-COE M + 150L — Water heating efficiency ηwh: 145 %; Annual electricity use, colder climate: 704 kWh; Annual electricity use, warmer climate: 704 kWh; ηwh, colder climate: 145 %
WPU 6G 65-E M + 150L — Water heating efficiency ηwh: 145 %; Annual electricity use, colder climate: 704 kWh; Annual electricity use, warmer climate: 704 kWh; ηwh, colder climate: 145 %
WPU 6G 75-CE M + 150L — Water heating efficiency ηwh: 149 %; Annual electricity use, colder climate: 688 kWh; Annual electricity use, warmer climate: 688 kWh; ηwh, colder climate: 149 %
WPU 6G 75-COE M + 150L — Water heating efficiency ηwh: 149 %; Annual electricity use, colder climate: 688 kWh; Annual electricity use, warmer climate: 688 kWh; ηwh, colder climate: 149 %
WPU 6G 75-E M + 150L — Water heating efficiency ηwh: 149 %; Annual electricity use, colder climate: 688 kWh; Annual electricity use, warmer climate: 688 kWh; ηwh, colder climate: 149 %
WPU45 COE-5G + WPV 150L 3G — Water heating efficiency ηwh: 149 %; Annual electricity use, colder climate: 687 kWh; Annual electricity use, warmer climate: 687 kWh; ηwh, colder climate: 149 %
WPU45 E-5G + WPV 150L 3G — Water heating efficiency ηwh: 152 %; Annual electricity use, colder climate: 672 kWh; Annual electricity use, warmer climate: 672 kWh; ηwh, colder climate: 152 %
WPU45 I-5G + WPV 150L 3G — Water heating efficiency ηwh: 152 %; Annual electricity use, colder climate: 672 kWh; Annual electricity use, warmer climate: 672 kWh; ηwh, colder climate: 152 %
WPU45 KC-5G + WPV 150L 3G — Water heating efficiency ηwh: 152 %; Annual electricity use, colder climate: 672 kWh; Annual electricity use, warmer climate: 672 kWh; ηwh, colder climate: 152 %
WPU55 C-5G + WPV 150L 3G — Annual electricity use, colder climate: 666 kWh; Annual electricity use, warmer climate: 666 kWh; Indoor sound power: 46 dB(A)
WPU55 COE-5G + WPV 150L 3G — Annual electricity use, colder climate: 666 kWh; Annual electricity use, warmer climate: 666 kWh; Indoor sound power: 46 dB(A)
WPU55 E-5G + WPV 150L 3G — Water heating efficiency ηwh: 155 %; Annual electricity use, colder climate: 660 kWh; Annual electricity use, warmer climate: 660 kWh; ηwh, colder climate: 155 %
WPU55 I-5G + WPV 150L 3G — Water heating efficiency ηwh: 155 %; Annual electricity use, colder climate: 660 kWh; Annual electricity use, warmer climate: 660 kWh; ηwh, colder climate: 155 %
WPU55 KC-5G + WPV 150L 3G — Water heating efficiency ηwh: 155 %; Annual electricity use, colder climate: 660 kWh; Annual electricity use, warmer climate: 660 kWh; ηwh, colder climate: 155 %
WPU65 C-5G + WPV 150L 3G — Water heating efficiency ηwh: 146 %; Annual electricity use, colder climate: 700 kWh; Annual electricity use, warmer climate: 700 kWh; ηwh, colder climate: 146 %
WPU65 COE-5G + WPV 150L 3G — Water heating efficiency ηwh: 146 %; Annual electricity use, colder climate: 700 kWh; Annual electricity use, warmer climate: 700 kWh; ηwh, colder climate: 146 %
WPU65 E-5G + WPV 150L 3G — Water heating efficiency ηwh: 148 %; Annual electricity use, colder climate: 691 kWh; Annual electricity use, warmer climate: 691 kWh; ηwh, colder climate: 148 %
WPU65 I-5G + WPV 150L 3G — Water heating efficiency ηwh: 148 %; Annual electricity use, colder climate: 691 kWh; Annual electricity use, warmer climate: 691 kWh; ηwh, colder climate: 148 %
WPU65 KC-5G + WPV 150L 3G — Water heating efficiency ηwh: 148 %; Annual electricity use, colder climate: 691 kWh; Annual electricity use, warmer climate: 691 kWh; ηwh, colder climate: 148 %
WPU75 C-5G + WPV 150L 3G — Water heating efficiency ηwh: 140 %; Annual electricity use, colder climate: 730 kWh; Annual electricity use, warmer climate: 730 kWh; ηwh, colder climate: 140 %
WPU75 COE-5G + WPV 150L 3G — Water heating efficiency ηwh: 140 %; Annual electricity use, colder climate: 730 kWh; Annual electricity use, warmer climate: 730 kWh; ηwh, colder climate: 140 %
WPU75 E-5G + WPV 150L 3G — Water heating efficiency ηwh: 142 %; Annual electricity use, colder climate: 720 kWh; Annual electricity use, warmer climate: 720 kWh; ηwh, colder climate: 142 %
WPU75 I-5G + WPV 150L 3G — Water heating efficiency ηwh: 142 %; Annual electricity use, colder climate: 720 kWh; Annual electricity use, warmer climate: 720 kWh; ηwh, colder climate: 142 %
WPU75 KC-5G + WPV 150L 3G — Water heating efficiency ηwh: 142 %; Annual electricity use, colder climate: 720 kWh; Annual electricity use, warmer climate: 720 kWh; ηwh, colder climate: 142 %

Manufacturer documentation

Product page (ithodaalderop.nl)

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

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Frequently asked questions

What is the water heating efficiency ηwh of the Itho Daalderop WPU 6G 18-E M + 150L?

The water heating efficiency ηwh of the Itho Daalderop WPU 6G 18-E M + 150L is 154 %.¹

Which load profile does the Itho Daalderop WPU 6G 18-E M + 150L have?

The Itho Daalderop WPU 6G 18-E M + 150L has load profile L.¹

Which energy label does the Itho Daalderop WPU 6G 18-E M + 150L have?

The Itho Daalderop WPU 6G 18-E M + 150L has energy label A+.¹

What is the indoor sound power of the Itho Daalderop WPU 6G 18-E M + 150L?

The indoor sound power of the Itho Daalderop WPU 6G 18-E M + 150L is 37 dB(A).¹

Sources

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

Key figures