iDM AERO ALM 10-24
The iDM AERO ALM 10-24 is an air-to-water heat pump with a SCOP of 5.7 (35 °C) and a sound power level of 56 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 3.6 m; against a wall 5.0 m.1,2
Key figures
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
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 21 kW; the scheme covers systems up to 45 kW.
- SCOP at 55 °C: 4.2. The installed system needs a SCOP of at least 2.8 (MCS calculation).
Technical specifications
| General | |
|---|---|
| Type (source) | Air-to-water1 |
| Compressors | 11 |
| Capacity control | drehzahlregelung1 |
| Performance | |
| Rated output 35 °C | 21 kW2 |
| Rated output 55 °C | 19 kW2 |
| Efficiency | |
| SCOP (35 °C) | 5.72 |
| SCOP (55 °C) | 4.22 |
| Seasonal efficiency ηs 35 °C | 225 %2 |
| Seasonal efficiency ηs 55 °C | 165 %2 |
| Energy label 35 °C | A+++2 |
| Energy label 55 °C | A+++2 |
| COP A7/W35 | 4.551 |
| COP A2/W35 | 3.181 |
| COP A-7/W35 | 2.851 |
| Noise | |
| Outdoor unit sound power | 56 dB(A)2 |
| Refrigerant | |
| Refrigerant | R2901 |
| Refrigerant charge | 4.4 kg1 |
| Electrical | |
| Max. power input | 11.7 kW1 |
| Connectivity & smart | |
| SG Ready | Yes1 |
How it ranks
SCOP (35 °C): better than 99% of comparable models in our database (Heat pumps · Air-to-water · ≥ 14 kW; n = 208).
Rank 2 of 209
Compared with every model on VersusIndex in the same group with a known value; equal values do not count as better. This says nothing about price, installation or reliability.
Manufacturer documentation
External links to iDM's official website. The manufacturer may change or move documents; where they differ, the manufacturer's latest version applies.
Similar models
Other brands, same type and a comparable size.
More from iDM
- iDM TERRA SWM 6-17 SCOP (35 °C): 7.98
- iDM iPUMP T14 (W/W) SCOP (35 °C): 6.5
- iDM AERO ALM 8-18 SCOP (35 °C): 5.62
- iDM TERRA SW 20 Twin SCOP (35 °C): 7.92
- iDM TERRA SW 13 Twin H SCOP (35 °C): 5.49
- iDM TERRA SW 22 Twin H SCOP (35 °C): 6.19
Featured in these lists
Guides on heat pumps
- SCOP, COP and ηs: what a heat pump’s efficiency figures mean
- Hybrid or full heat pump? The main types compared
- Heat pump noise: MCS 020(a), permitted development and where to put the unit
- Sizing a heat pump: heat loss, flow temperature and rated output
- Heat pump refrigerants: R290, R32 and R410A compared
How we collect and check this data →
Frequently asked questions
Can I install the iDM AERO ALM 10-24 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 56 dB(A) that indicatively means 3.6 m free-standing, 5.0 m against a wall or 7.1 m in a corner. Your MCS installer must confirm this.1,2
Sources
- List of eligible heat pumps (BEG) — Bundesamt für Wirtschaft und Ausfuhrkontrolle (BAFA) · accessed 28 Sept 2026
- European Product Registry for Energy Labelling (EPREL) – heat pumps — Europese Commissie · accessed 15 Oct 2026
- MCS 020(a) (England, permitted development since 29 May 2025)
- Boiler Upgrade Scheme: what you can get — GOV.UK · accessed 27 Sept 2026
- Boiler Upgrade Scheme: guidance for installers (V5) — Ofgem · accessed 27 Sept 2026
- Boiler Upgrade Scheme product eligibility — Ofgem · accessed 27 Sept 2026