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Heat pumps · UK

ATAGEnergion M 120T

The ATAG Energion M 120T is an air-to-water heat pump with a SCOP of 5.16 (35 °C) and a sound power level of 58 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 4.5 m; against a wall 6.3 m.1

Last updated: Technical specifications Rules in the UK ⇄ Compare this model
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SCOP (35 °C)
5.161

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

Outdoor unit sound power
58dB(A)1
Manufacturer data
Max. flow temperature
60°C1
Manufacturer data
Type (source)
Air-to-water1
Manufacturer data
Rated output 35 °C
10.84kW1
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 4.5 m
Against wall 6.3 m
In corner 9 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.
  • Rated output 10.84 kW; the scheme covers systems up to 45 kW.
  • SCOP at 55 °C: 3.65. 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-water1
Performance
Rated output 35 °C 10.84 kW1
Rated output 55 °C 9.42 kW1
Max. flow temperature 60 °C1
Min. outdoor temperature -20 °C1
Efficiency
SCOP (35 °C) 5.161
SCOP (55 °C) 3.651
Seasonal efficiency ηs 35 °C 204 %1
Seasonal efficiency ηs 55 °C 143 %1
Noise
Outdoor unit sound power 58 dB(A)1

Manufacturer documentation

  • Product page (atagverwarming.nl)
  • Manual — ATAG Energion M Plus, M Compact, M Light – productkaart / ErP technische data – 420011186500 - 02/2022 (atag.compano.com, PDF)

External links to ATAG'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 ATAG Energion M 120T 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 58 dB(A) that indicatively means 4.5 m free-standing, 6.3 m against a wall or 9.0 m in a corner. Your MCS installer must confirm this.1

How much Boiler Upgrade Scheme grant can you get for the ATAG Energion M 120T?

£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

Sources

  1. ATAG Energion M Plus, M Compact, M Light – productkaart / ErP technische data, 420011186500 - 02/2022 — ATAG Verwarming Nederland 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