STIEBEL ELTRON WPE-I 15 HW 230 Premium
The STIEBEL ELTRON WPE-I 15 HW 230 Premium is a heat pump with SCOP (35 °C) 5.33 and refrigerant R454C.1,2
Key figures
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 14 kW; the scheme covers systems up to 45 kW.
- SCOP at 55 °C: 4.28. The installed system needs a SCOP of at least 2.8 (MCS calculation).
Technical specifications
| General | |
|---|---|
| Type (source) | Ground source1 |
| Compressors | 11 |
| Capacity control | drehzahlregelung1 |
| Performance | |
| Rated output 35 °C | 14 kW2 |
| Rated output 55 °C | 14 kW2 |
| Efficiency | |
| SCOP (35 °C) | 5.332 |
| SCOP (55 °C) | 4.282 |
| Seasonal efficiency ηs 35 °C | 210 %2 |
| Seasonal efficiency ηs 55 °C | 168 %2 |
| Energy label 35 °C | A+++2 |
| Energy label 55 °C | A+++2 |
| Noise | |
| Indoor unit sound power | 45 dB(A)2 |
| Refrigerant | |
| Refrigerant | R454C1 |
| Refrigerant charge | 3.1 kg1 |
| Electrical | |
| Max. power input | 5.63 kW1 |
| Connectivity & smart | |
| SG Ready | Yes1 |
How it ranks
SCOP (35 °C): better than 67% of comparable models in our database (Heat pumps · Ground source · ≥ 14 kW; n = 123).
Rank 37 of 124
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:
- WPE-I 15 HW 230 Premium
- WPE-I 15 HKW 230 Premium
Similar models
Other brands, same type and a comparable size.
More from STIEBEL ELTRON
- STIEBEL ELTRON WPE-I 13 H 400 Plus SCOP (35 °C): 3.65
- STIEBEL ELTRON WPL-A 13.2 Trend HK 400 SCOP (35 °C): 4.65
- STIEBEL ELTRON WPL-A 13 HK 400 Premium SCOP (35 °C): 4.35
- STIEBEL ELTRON WPW-I 12 H 400 Premium SCOP (35 °C): 6.3
- STIEBEL ELTRON HPG-I 15 (D)(C)S Premium SCOP (35 °C): 5.44
- STIEBEL ELTRON WPE-I 15 H 230 Premium SCOP (35 °C): 5.33
Guides on heat pumps
- SCOP, COP and ηs: what a heat pump’s efficiency figures mean
- Hybrid or full heat pump? The main types compared
- Heat pump noise: MCS 020(a), permitted development and where to put the unit
- Sizing a heat pump: heat loss, flow temperature and rated output
- Heat pump refrigerants: R290, R32 and R410A compared
How we collect and check this data →
Frequently asked questions
What is the SCOP (35 °C) of the STIEBEL ELTRON WPE-I 15 HW 230 Premium?
The SCOP (35 °C) of the STIEBEL ELTRON WPE-I 15 HW 230 Premium is 5.33.1,2
Which refrigerant does the STIEBEL ELTRON WPE-I 15 HW 230 Premium use?
The refrigerant of the STIEBEL ELTRON WPE-I 15 HW 230 Premium is R454C.1,2
How much Boiler Upgrade Scheme grant can you get for the STIEBEL ELTRON WPE-I 15 HW 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