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Heat pump water heaters · IE

RHOSS TWCZ-B 300

The RHOSS TWCZ-B 300 is a heat pump water heater with water heating efficiency ηwh 117 %, load profile XL and energy label A.1

Last updated: Technical specifications⇄ Compare this model
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Water heating efficiency ηwh
117%1
Load profile
XL1
Official source
Energy label
A1
Official source
Indoor sound power
58dB(A)1
Official source
ηwh, colder climate
105%1
Official source

Technical specifications

General
Load profileXL1
Registered in EPREL2023-021
Efficiency
Water heating efficiency ηwh117 %1
ηwh, colder climate105 %1
ηwh, warmer climate125 %1
Energy labelA1
Annual electricity use, colder climate1,546 kWh1
Annual electricity use, warmer climate1,340 kWh1
Noise
Indoor sound power58 dB(A)1
Connectivity & smart
Smart controlYes1
Off-peak hours onlyYes1

How it ranks

Water heating efficiency ηwh: better than 4% of comparable models in our database (Heat pump water heaters · Load profile XL; n = 159).

Rank 151 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:

  • TWCZ-B 300
  • TWCZ-S 300

Compare with

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Frequently asked questions

What is the water heating efficiency ηwh of the RHOSS TWCZ-B 300?

The water heating efficiency ηwh of the RHOSS TWCZ-B 300 is 117 %.1

Which load profile does the RHOSS TWCZ-B 300 have?

The RHOSS TWCZ-B 300 has load profile XL.1

Which energy label does the RHOSS TWCZ-B 300 have?

The RHOSS TWCZ-B 300 has energy label A.1

What is the indoor sound power of the RHOSS TWCZ-B 300?

The indoor sound power of the RHOSS TWCZ-B 300 is 58 dB(A).1

Sources

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