Clivet WiSAN-PMP 1 S 3.1
The Clivet WiSAN-PMP 1 S 3.1 is an air-to-water heat pump with a SCOP of 5.05 (35 °C) and a sound power level of 46 dB(A). Under permitted development the limit is 37 dB(A) measured 1 m in front of the centre of a neighbour’s habitable-room door or window. Free-standing, the indicative minimum distance is 1.1 m; against a wall 1.6 m.1,2,3
Key figures
Rules in the UK
Minimum distance to your neighbour
MCS 020(a) (England, permitted development since 29 May 2025)4 · 1 m in front of the centre of a neighbour’s habitable-room door or window
Indicative calculation (hemispherical, no barriers). Not a substitute for an MCS 020 assessment.
Boiler Upgrade Scheme
Check conditions£7,500 – £9,0005Fixed 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.6,7
- Must be MCS-certified (product and installer). Check the Ofgem product eligibility list.
- Rated output 6 kW; the scheme covers systems up to 45 kW.
- SCOP at 55 °C: 3.98. The installed system needs a SCOP of at least 2.8 (MCS calculation).
Technical specifications
| General | |
|---|---|
| Type (source) | Air-to-water2 |
| Performance | |
| Heating capacity (A7/W35) | 6.1 kW2 |
| Rated output 35 °C | 6 kW3 |
| Rated output 55 °C | 6 kW3 |
| Efficiency | |
| SCOP (35 °C) | 5.053 |
| SCOP (55 °C) | 3.983 |
| Seasonal efficiency ηs 35 °C | 199 %3 |
| Seasonal efficiency ηs 55 °C | 156 %3 |
| Energy label 35 °C | A+++3 |
| Energy label 55 °C | A+++3 |
| COP A7/W35 | 5.032 |
| Noise | |
| Outdoor unit sound power | 46 dB(A)3 |
| Refrigerant | |
| Refrigerant | R2902 |
| Refrigerant GWP | 32 |
| Refrigerant charge | 1.05 kg2 |
| Grants & market | |
| ISDE grant (NL) | 2,575 €1 |
How it ranks
SCOP (35 °C): better than 85% of comparable models in our database (Heat pumps · Air-to-water · 6–8 kW; n = 182).
Rank 23 of 183
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.
Similar models
Other brands, same type and a comparable size.
More from Clivet
- Clivet WiSAN-PME 1 S 3.1 SCOP (35 °C): 4.93
- Clivet WiSAN-YME 1 S 2.1 SCOP (35 °C): 4.85
- Clivet WiSAN-YME 1 S 3.1 SCOP (35 °C): 4.95
- Clivet WiSAN-PME 1 S 2.1 SCOP (35 °C): 5.1
- Clivet WiSAN-PMP 1 S 2.1 SCOP (35 °C): 5.23
- Clivet WiSAN-PME 1 S 4.1 SCOP (35 °C): 5.2
Featured in these lists
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
Can I install the Clivet WiSAN-PMP 1 S 3.1 without planning permission?
Under MCS 020(a) (England, permitted development since 29 May 2025) the unit must not exceed 37 dB(A) 1 m in front of the centre of a neighbour’s habitable-room door or window. With a sound power of 46 dB(A) that indicatively means 1.1 m free-standing, 1.6 m against a wall or 2.2 m in a corner. Your MCS installer must confirm this.1,2,3
How much Boiler Upgrade Scheme grant can you get for the Clivet WiSAN-PMP 1 S 3.1?
£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.1,2,3
Sources
- ISDE heat pump notification code list — Rijksdienst voor Ondernemend Nederland (RVO) · accessed 27 Sept 2026
- Heat Pump Keymark certificates — EHPA / DIN CERTCO (Heat Pump KEYMARK) · accessed 29 Sept 2026
- European Product Registry for Energy Labelling (EPREL) – heat pumps — Europese Commissie · accessed 15 Oct 2026
- MCS 020(a) (England, permitted development since 29 May 2025)
- 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