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Heat pumps · UK

QuattHeatPump Duo

Quatt HeatPump Duo
Image: Quattrequest removal

The Quatt HeatPump Duo is an air-to-water heat pump with a SCOP of 4.93 (35 °C) and a sound power level of 61 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 6.3 m; against a wall 8.9 m.1

Last updated: Technical specifications Rules in the UK ⇄ Compare this model
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SCOP (35 °C)
4.931

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

Heating capacity (A7/W35)
10.8kW1
Manufacturer data
Outdoor unit sound power
61dB(A)1
Manufacturer data
Refrigerant
R2901
Manufacturer data
Max. flow temperature
70°C1
Manufacturer data
UK

Rules in the UK

Minimum distance to your neighbour

MCS 020(a) (England, permitted development since 29 May 2025)2 · 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 6.3 m
Against wall 8.9 m
In corner 12.6 m

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

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.
  • SCOP at 55 °C: 3.82. The installed system needs a SCOP of at least 2.8 (MCS calculation).
Heat pump grants in the UK explained →

Technical specifications

Performance
Heating capacity (A7/W35) 10.8 kW1
Max. flow temperature 70 °C1
Min. outdoor temperature -25 °C1
Efficiency
SCOP (35 °C) 4.931
SCOP (55 °C) 3.821
Energy label 35 °C A, , , 1
Energy label 55 °C A, , , 1
COP A7/W35 4.91
COP A2/W35 41
COP A-7/W35 2.71
Noise
Outdoor unit sound power 61 dB(A)1
Refrigerant
Refrigerant R2901
Refrigerant charge 0.48 kg1

Manufacturer documentation

External links to Quatt'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 Quatt HeatPump Duo 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 61 dB(A) that indicatively means 6.3 m free-standing, 8.9 m against a wall or 12.6 m in a corner. Your MCS installer must confirm this.1

How much Boiler Upgrade Scheme grant can you get for the Quatt HeatPump Duo?

£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

Which refrigerant does the Quatt HeatPump Duo use?

The Quatt HeatPump Duo uses R290.1

Sources

  1. Quatt HeatPump – technische specificaties, v1.3 — Quatt B.V. · accessed 27 Sept 2026
  2. MCS 020(a) (England, permitted development since 29 May 2025)
  3. Boiler Upgrade Scheme: what you can get — GOV.UK · accessed 27 Sept 2026
  4. Boiler Upgrade Scheme: guidance for installers (V5) — Ofgem · accessed 27 Sept 2026
  5. Boiler Upgrade Scheme product eligibility — Ofgem · accessed 27 Sept 2026