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Heat pumps · UK

ImmergasMagis M8 Top

Immergas Magis M8 Top
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The Immergas Magis M8 Top is an air-to-water heat pump with a SCOP of 4.85 (35 °C) and a sound power level of 51 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 2.0 m; against a wall 2.8 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)
8kW2
Official source
Outdoor unit sound power
51dB(A)2
Official source
Refrigerant
R2902
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 2 m
Against wall 2.8 m
In corner 4 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 8 kW; the scheme covers systems up to 45 kW.
  • SCOP at 55 °C: 3.55. 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) 8 kW2
Rated output 35 °C 8 kW2
Rated output 55 °C 8 kW2
Efficiency
SCOP (35 °C) 4.852
SCOP (55 °C) 3.552
Seasonal efficiency ηs 35 °C 191 %2
Seasonal efficiency ηs 55 °C 139 %2
Energy label 35 °C A, , , 2
Energy label 55 °C A, , 2
COP A7/W35 4.912
Noise
Outdoor unit sound power 51 dB(A)2
Refrigerant
Refrigerant R2902
Refrigerant GWP 32
Refrigerant charge 0.87 kg2
Grants & market
ISDE grant (NL) 2,800 €1

Manufacturer documentation

External links to Immergas'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 Immergas Magis M8 Top 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 51 dB(A) that indicatively means 2.0 m free-standing, 2.8 m against a wall or 4.0 m in a corner. Your MCS installer must confirm this.1,2

How much Boiler Upgrade Scheme grant can you get for the Immergas Magis M8 Top?

£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 Immergas Magis M8 Top use?

The Immergas Magis M8 Top uses R290.1,2

Sources

  1. ISDE heat pump notification code list — Rijksdienst voor Ondernemend Nederland (RVO) · accessed 27 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