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Heat pumps · UK

ThermiaiTec E 12 400V

The Thermia iTec E 12 400V is an air-to-water heat pump with a SCOP of 4.69 (35 °C) and a sound power level of 64 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 8.9 m; against a wall 12.6 m.1

Last updated: Technical specifications Rules in the UK
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SCOP (35 °C)
4.691

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

Outdoor unit sound power
64dB(A)1
Official source
Refrigerant
R321
Official source
Rated output 35 °C
13kW1
Official source
Rated output 55 °C
12kW1
Official source
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 8.9 m
Against wall 12.6 m
In corner 17.9 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 13 kW; the scheme covers systems up to 45 kW.
  • SCOP at 55 °C: 3.53. The installed system needs a SCOP of at least 2.8 (MCS calculation).
Heat pump grants in the UK explained →

Technical specifications

General
Type Air-to-water1
Compressors 11
Capacity control drehzahlregelung1
Performance
Rated output 35 °C 13 kW1
Rated output 55 °C 12 kW1
Efficiency
SCOP (35 °C) 4.691
SCOP (55 °C) 3.531
Seasonal efficiency ηs 35 °C 185 %1
Seasonal efficiency ηs 55 °C 138 %1
COP A7/W35 4.531
COP A2/W35 3.941
COP A-7/W35 2.661
Noise
Outdoor unit sound power 64 dB(A)1
Indoor unit sound power 40 dB(A)1
Refrigerant
Refrigerant R321
Refrigerant charge 2.2 kg1
Electrical
Max. power input 3.73 kW1
Connectivity & smart
SG Ready Yes1

Frequently asked questions

Can I install the Thermia iTec E 12 400V 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 64 dB(A) that indicatively means 8.9 m free-standing, 12.6 m against a wall or 17.9 m in a corner. Your MCS installer must confirm this.1

How much Boiler Upgrade Scheme grant can you get for the Thermia iTec E 12 400V?

£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 Thermia iTec E 12 400V use?

The Thermia iTec E 12 400V uses R32.1

Sources

  1. List of eligible heat pumps (BEG) — Bundesamt für Wirtschaft und Ausfuhrkontrolle (BAFA) · 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