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Heat pump water heaters · IE

RHOSS TWCTZ-B 300

RHOSS TWCTZ-B 300
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The RHOSS TWCTZ-B 300 is a heat pump water heater with water heating efficiency ηwh 131 %, load profile XL and energy label A+.1

Last updated: Technical specifications⇄ Compare this model
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Water heating efficiency ηwh
131%1
Load profile
XL1
Official source
Energy label
A+1
Official source
Indoor sound power
55dB(A)1
Official source
ηwh, colder climate
123%1
Official source

Technical specifications

General
Load profileXL1
Registered in EPREL2023-021
Efficiency
Water heating efficiency ηwh131 %1
ηwh, colder climate123 %1
ηwh, warmer climate148 %1
Energy labelA+1
Annual electricity use, colder climate1,360 kWh1
Annual electricity use, warmer climate1,133 kWh1
Noise
Indoor sound power55 dB(A)1
Connectivity & smart
Smart controlYes1

How it ranks

Water heating efficiency ηwh: better than 28% of comparable models in our database (Heat pump water heaters · Load profile XL; n = 159).

Rank 113 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:

  • TWCTZ-B 300
  • TWCTZ-S 300

Manufacturer documentation

External links to RHOSS'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 RHOSS TWCTZ-B 300?

The water heating efficiency ηwh of the RHOSS TWCTZ-B 300 is 131 %.1

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

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

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

The RHOSS TWCTZ-B 300 has energy label A+.1

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

The indoor sound power of the RHOSS TWCTZ-B 300 is 55 dB(A).1

Sources

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