Heat pumps · UK

STIEBEL ELTRON WPE-I 06 H 230 Premium

The STIEBEL ELTRON WPE-I 06 H 230 Premium is a heat pump with SCOP (35 °C) 5.08 and refrigerant R454C.^1,2

Last updated: 18 October 2026Technical specifications Rules in the UK ⇄ Compare this model

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SCOP (35 °C): 5.08²
Seasonal efficiency: how much heat you get per kWh of electricity across a heating season.
Refrigerant: R454C¹
Official source
Type (source): Ground source¹
Official source
Rated output 35 °C: 7kW²
Official source
Rated output 55 °C: 6kW²
Official source

Rules in the UK

Boiler Upgrade Scheme

Check conditions

£7,500 – £9,000³Fixed grant (England & Wales)

Fixed grant in England and Wales, deducted from your installer’s quote. £9,000 when replacing oil or LPG off the gas grid (until March 2027). Scotland: Home Energy Scotland grant instead.^4,5

Must be MCS-certified (product and installer). Check the Ofgem product eligibility list.
Rated output 7 kW; the scheme covers systems up to 45 kW.
SCOP at 55 °C: 4.05. The installed system needs a SCOP of at least 2.8 (MCS calculation).

Heat pump grants in the UK explained →

Technical specifications

General
Type (source)	Ground source¹
Compressors	1¹
Capacity control	drehzahlregelung¹
Performance
Rated output 35 °C	7 kW²
Rated output 55 °C	6 kW²
Efficiency
SCOP (35 °C)	5.08²
SCOP (55 °C)	4.05²
Seasonal efficiency ηs 35 °C	200 %²
Seasonal efficiency ηs 55 °C	159 %²
Energy label 35 °C	A+++²
Energy label 55 °C	A+++²
Noise
Indoor unit sound power	41 dB(A)²
Refrigerant
Refrigerant	R454C¹
Refrigerant charge	2.2 kg¹
Electrical
Max. power input	2.8 kW¹
Connectivity & smart
SG Ready	Yes¹

How it ranks

SCOP (35 °C): better than 63% of comparable models in our database (Heat pumps · Ground source · 6–8 kW; n = 38).

Rank 12 of 39

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 4 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:

WPE-I 06 H 230 Premium
WPE-I 06 HK 230 Premium
WPE-I 06 HKW 230 Premium — Indoor unit sound power: 48 dB(A)
WPE-I 06 HW 230 Premium — Indoor unit sound power: 43 dB(A)

Similar models

Other brands, same type and a comparable size.

Guides on heat pumps

How we collect and check this data →

Frequently asked questions

What is the SCOP (35 °C) of the STIEBEL ELTRON WPE-I 06 H 230 Premium?

The SCOP (35 °C) of the STIEBEL ELTRON WPE-I 06 H 230 Premium is 5.08.^1,2

Which refrigerant does the STIEBEL ELTRON WPE-I 06 H 230 Premium use?

The refrigerant of the STIEBEL ELTRON WPE-I 06 H 230 Premium is R454C.^1,2

How much Boiler Upgrade Scheme grant can you get for the STIEBEL ELTRON WPE-I 06 H 230 Premium?

£7,500 in England and Wales, provided the product and installer are MCS-certified (£9,000 when replacing oil or LPG off the gas grid, until March 2027). The installer applies and deducts the grant from your quote.^1,2

Sources

List of eligible heat pumps (BEG) — Bundesamt für Wirtschaft und Ausfuhrkontrolle (BAFA) · accessed 18 Oct 2026
European Product Registry for Energy Labelling (EPREL) – heat pumps — Europese Commissie · accessed 15 Oct 2026
Boiler Upgrade Scheme: what you can get — GOV.UK · accessed 27 Sept 2026
Boiler Upgrade Scheme: guidance for installers (V5) — Ofgem · accessed 27 Sept 2026
Boiler Upgrade Scheme product eligibility — Ofgem · accessed 27 Sept 2026

Key figures