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Heat pumps · UK

RotensoAQS40X1o/AQS60X13i

Rotenso AQS40X1o/AQS60X13i
Image: Rotensorequest removal

The Rotenso AQS40X1o/AQS60X13i is an air-to-water heat pump with a SCOP of 4.85 (35 °C) and a sound power level of 56 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 3.6 m; against a wall 5.0 m.1,2

Last updated: Technical specifications Rules in the UK ⇄ Compare this model
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SCOP (35 °C)
4.852

Seasonal efficiency: how much heat you get per kWh of electricity across a heating season.

Heating capacity (A7/W35)
4.25kW2
Official source
Outdoor unit sound power
56dB(A)2
Official source
Refrigerant
R322
Official source
Type (source)
Air-to-water2
Official source
UK

Rules in the UK

Minimum distance to your neighbour

MCS 020(a) (England, permitted development since 29 May 2025)3 · 1 m in front of the centre of a neighbour’s habitable-room door or window

Permitted development (MCS 020(a)) ≤ 37 dB(A) · LAeq,5min
Free-standing 3.6 m
Against wall 5 m
In corner 7.1 m

Indicative calculation (hemispherical, no barriers). Not a substitute for an MCS 020 assessment.

Boiler Upgrade Scheme

Check conditions

£7,500 – £9,0004Fixed 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.5,6

  • Must be MCS-certified (product and installer). Check the Ofgem product eligibility list.
  • Rated output 5.52 kW; the scheme covers systems up to 45 kW.
  • SCOP at 55 °C: 3.31. 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) Air-to-water2
Performance
Heating capacity (A7/W35) 4.25 kW2
Rated output 35 °C 5.52 kW2
Rated output 55 °C 4.4 kW2
Min. outdoor temperature -22 °C2
Efficiency
SCOP (35 °C) 4.852
SCOP (55 °C) 3.312
Seasonal efficiency ηs 35 °C 191 %2
Seasonal efficiency ηs 55 °C 130 %2
Energy label 35 °C A, , , 2
Energy label 55 °C A, , 2
COP A7/W35 5.22
Noise
Outdoor unit sound power 56 dB(A)2
Indoor unit sound power 38 dB(A)2
Refrigerant
Refrigerant R322
Refrigerant GWP 6752
Refrigerant charge 1.5 kg2
Grants & market
ISDE grant (NL) 2,350 €1

Manufacturer documentation

External links to Rotenso's official website. The manufacturer may change or move documents; where they differ, the manufacturer's latest version applies.

Frequently asked questions

Can I install the Rotenso AQS40X1o/AQS60X13i 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 56 dB(A) that indicatively means 3.6 m free-standing, 5.0 m against a wall or 7.1 m in a corner. Your MCS installer must confirm this.1,2

How much Boiler Upgrade Scheme grant can you get for the Rotenso AQS40X1o/AQS60X13i?

£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

Which refrigerant does the Rotenso AQS40X1o/AQS60X13i use?

The Rotenso AQS40X1o/AQS60X13i uses R32.1,2

Sources

  1. ISDE heat pump notification code list — Rijksdienst voor Ondernemend Nederland (RVO) · accessed 28 Sept 2026
  2. Heat Pump Keymark certificates — EHPA / DIN CERTCO (Heat Pump KEYMARK) · accessed 29 Sept 2026
  3. MCS 020(a) (England, permitted development since 29 May 2025)
  4. Boiler Upgrade Scheme: what you can get — GOV.UK · accessed 27 Sept 2026
  5. Boiler Upgrade Scheme: guidance for installers (V5) — Ofgem · accessed 27 Sept 2026
  6. Boiler Upgrade Scheme product eligibility — Ofgem · accessed 27 Sept 2026