The data now lives in _data/heat_pumps.yml as a clean single source of truth, so figures can be de-duplicated, re-ranked and checked by tooling rather than hand-edited in the table.

Criteria / methodology (unchanged from the 2024 table):

• Target property demand ~4–5kW; units may cycle if oversized (8kW+).
• EN 14511/14825 Average Climate. Low temp = 35°C, Medium = 45°C, High = 55°C.
• Ordered by SCOP@35°C where higher is better; ambiguous ranks fall back to 45°C then 55°C (we prefer mild-weather performance which gives greater yearly SCOP).
• MCS Product Database figures are the source of truth and replace datasheet figures where they differ — see MCS Product Directory.
• Where a model has no MCS certification, published manufacturer/datasheet figures are used instead and flagged 💔 (unverified). Note many manufacturers publish only COP, not the SCOP@35/45/55 trio, so some newly launched models show no SCOP until they are MCS-certified.
• A * on SCOP@45°C means it was estimated as mean(35,55) because the datasheet omitted it (a conservative underestimate).

Status column legend

MCS verified, Datasheet only and Rumoured / no data in the Status column are searchable terms — type one into the search box to isolate that confidence tier.

Notes:

• Figures are refreshed from the MCS Product Database using tools/fetch_mcs.py; links are validated with tools/check_links.py (see tools/README.md).
• The older 2024 5kW table is retained for history.

ToDo / research backlog:

• Vaillant aroTHERM plus 2025/26 (improved-spec model expected to reach the UK market in 2026).
• Confirm SCOP + MCS certs for newly announced 2025/26 models and move them from Rumoured / no data up into a verified tier as figures are published.

Heatpunk - the free, MCS-compliant heat loss and heat pump design software - has launched exciting new upgrades!

Its made by https://midsummerwholesale.co.uk/ which is also why they provde it free as if your interested you can transfer your system over to the Wholesalers main site for accurate pricing quote!

Firstly, it appears some manufacturers are very active and update their performance figures. The one place we have to verify is the MCS Product database which provides 3rd party verification and correlation here is our key indicator of data reliability.

Ideal Heating (and others TBC) are not showing the verified figures on their website, either due to compilcated internal processes or lack of desire to show a public image with lesser performance.

This is our concern as to how we know what numbers to trust?

So, in need of picking an example, I will take Ideal Logic Air 5kW as a basis of what appears to be over-stated SCOP on the marketing site and donwloadable datasheet!

I get that they want to make things look good but this could be misleading consumers and as a community we may need to find how we raise this.

For me, here we will need to include MCS correlation in our product databse to have higher confidence in the figures, there is a lot to verify and digest here.

Current list of verified devices that match third-party MCS verified SCOP performance:

• Ebac 5Kw
• Vaillant 5Kw

Update (2026): A refreshed, filterable 5–6kW table driven from a clean dataset is now maintained at Comparison of 5-6kW Heat Pumps (2026). This 2024 table is kept below for history.

This is a comparison table of all 2024-2025 heat-pump datasheet figures for make+models I am aware of.

Criteria:

• Target property 4-5Kw
• EN 14511/14825 (?) Average Climate and Low temperature = 35C and Medium = 55C
• Ordered by SCOP where higher is better. Where order is ambiguous the SCOP at 45C is used, and then 35C i.e. We prefer mild weather performance which gives greater yearly SCOP.

All SCOP figures are now correlated (i.e. replaced) with MCS 3rd party certified figures where possible. Please be aware :broken_heart: currently indicates a device that has not got a verified performance and may not be correctly ranked among others.

¹Make/Model = models may cycle due to being oversized i.e. 8KW+

² :gem: = Datasheet-matches-MCS, :green_book: = MCS-only-or-close-match, :orange_book: = MCS-not-close-to-datasheet, :broken_heart: = Not validated/Unknown

³1.23 = SCOP at 45C calculated as MEAN(35,55) when not made available in datasheet. This produces conservative underestimate of SCOP when unavailable.

⁴Only if directly shown in datasheet, many, if not all could be wall mounted, but not directly mentioned in datasheet.

ToDo:

• Add Wonderwall DR-HP-006-UK https://wondrwall.com/products/air-source-heat-pump/#technical-specifications
• Add CTC Ecoair 700M https://ctc-heating.com/products/air-to-water-heat-pumps/ctc-ecoair-700m

Changes:

• Fix data-entry error on Ebac 45C 4.63 to 4.38 (down to 4th)
• 2024-02 Ovum AC208P from 5.78 to 5.53 @ 35C, 4.15 to 4.00 @ 55C etc. old-datasheet
• 2024-02 EBac H1A05WG-GB from 5.11 to 4.91 @ 35C, 4.12 to 3.96 @ 55C old-datasheet
• 2024-04-25 Added Aira 6KW 1.0 with SCOP figures from MCS Product Database
• 2024-06-03 Added Octopus Cosy 6 with SCOP figures from MCS Product Database
• 2024-06-10 Remove inconsistent standard in favour of 3rd party MCS correlation for SCOP accuracy, devices re-ordered respectively
• 2024-12-11 Added Sound Power LEvel (dBa) + add Stiebel Eltron
• 2024-12-12 Added MCS figures for Bosch CS5800iAW 5Kw and LG Therma V 9Kw
• 2025-03 Preliminary entry of Wonderwall DR-HP-006-UK