versusindex
UK
Heat pumps · UK

ELCOAEROTOP T20

ELCO AEROTOP T20
Image: ELCOrequest removal

The ELCO AEROTOP T20 is an air-to-water heat pump with a SCOP of 3.56 (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
Search this model
SCOP (35 °C)
3.561

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

Heating capacity (A7/W35)
22.4kW1
Official source
Outdoor unit sound power
58dB(A)1
Official source
Refrigerant
R407C1
Official source
Type (source)
Air-to-water1
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 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

Not eligible

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 14 kW; the scheme covers systems up to 45 kW.
  • SCOP at 55 °C: 2.75. 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
Heating capacity (A7/W35) 22.4 kW1
Rated output 35 °C 14 kW1
Rated output 55 °C 12 kW1
Min. outdoor temperature -20 °C1
Efficiency
SCOP (35 °C) 3.561
SCOP (55 °C) 2.751
Seasonal efficiency ηs 35 °C 139 %1
Seasonal efficiency ηs 55 °C 107 %1
Energy label 35 °C A, 1
Energy label 55 °C A, 1
COP A7/W35 3.81
Noise
Outdoor unit sound power 58 dB(A)1
Indoor unit sound power 59 dB(A)1
Refrigerant
Refrigerant R407C1
Refrigerant GWP 1,7741
Refrigerant charge 6 kg1

Manufacturer documentation

External links to ELCO'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 ELCO AEROTOP T20 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 ELCO AEROTOP T20?

Probably none. SCOP at 55 °C: 2.75. The installed system needs a SCOP of at least 2.8 (MCS calculation).1

Which refrigerant does the ELCO AEROTOP T20 use?

The ELCO AEROTOP T20 uses R407C.1

Sources

  1. Heat Pump Keymark certificates — EHPA / DIN CERTCO (Heat Pump KEYMARK) · accessed 29 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