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Heat pumps · UK

CTC EcoPart 616M

CTC EcoPart 616M
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The CTC EcoPart 616M is a heat pump with SCOP (35 °C) 5.1 and refrigerant R407C.1,2

Last updated: Technical specificationsRules in the UK⇄ Compare this model
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SCOP (35 °C)
5.12

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

Refrigerant
R407C1
Official source
Type (source)
Ground source1
Official source
Rated output 35 °C
16kW2
Official source
Rated output 55 °C
16kW2
Official source
UK

Rules in the UK

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 16 kW; the scheme covers systems up to 45 kW.
  • SCOP at 55 °C: 3.93. 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)Ground source1
Performance
Rated output 35 °C16 kW2
Rated output 55 °C16 kW2
Efficiency
SCOP (35 °C)5.12
SCOP (55 °C)3.932
Seasonal efficiency ηs 35 °C201 %2
Seasonal efficiency ηs 55 °C154 %2
Energy label 35 °CA+++2
Energy label 55 °CA+++2
Noise
Indoor unit sound power40 dB(A)2
Refrigerant
RefrigerantR407C1
Refrigerant GWP1,7741
Refrigerant charge2.2 kg1

How it ranks

SCOP (35 °C): better than 43% of comparable models in our database (Heat pumps · Ground source · ≥ 14 kW; n = 123).

Rank 70 of 124

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.

Variants

This model is registered in 2 combinations (for example with a different indoor unit or cylinder) with exactly the same performance. All figures on this page apply to each of these types. The part of the type number that differs is in bold; small differences (e.g. cylinder volume or anode) are listed after it:

  • EcoPart 616M
  • EcoPart i616M

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Other brands, same type and a comparable size.

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Guides on heat pumps

How we collect and check this data →

Frequently asked questions

What is the SCOP (35 °C) of the CTC EcoPart 616M?

The SCOP (35 °C) of the CTC EcoPart 616M is 5.1.1,2

Which refrigerant does the CTC EcoPart 616M use?

The refrigerant of the CTC EcoPart 616M is R407C.1,2

How much Boiler Upgrade Scheme grant can you get for the CTC EcoPart 616M?

£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.1,2

Sources

  1. Heat Pump Keymark certificates — EHPA / DIN CERTCO (Heat Pump KEYMARK) · accessed 29 Sept 2026
  2. European Product Registry for Energy Labelling (EPREL) – heat pumps — Europese Commissie · accessed 15 Oct 2026
  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