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Heat pumps · MT

Clausius classic HC 5-25

The Clausius classic HC 5-25 is a heat pump with SCOP (35 °C) 5.55 and refrigerant R410A.1,2

Last updated: Technical specificationsRules in Malta⇄ Compare this model
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SCOP (35 °C)
5.552

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

Refrigerant
R410A1
Official source
Type (source)
Ground source1
Official source
Rated output 35 °C
25kW2
Official source
Rated output 55 °C
25kW2
Official source
MT

Rules in Malta

Water Heater Scheme (heat pump water heaters)

Unknown

REWS runs a national grant scheme for energy-efficient water heaters in homes; heat pump water heaters are eligible (alongside solar water heaters). The scheme has been extended to 31 December 2026, and part A of the application must be submitted before you buy and install the equipment. Grant amounts: see the REWS page (not verified by us).

Technical specifications

General
Type (source)Ground source1
Performance
Rated output 35 °C25 kW2
Rated output 55 °C25 kW2
Efficiency
SCOP (35 °C)5.552
SCOP (55 °C)4.652
Seasonal efficiency ηs 35 °C219 %2
Seasonal efficiency ηs 55 °C183 %2
Energy label 35 °CA+++2
Energy label 55 °CA+++2
Noise
Indoor unit sound power42 dB(A)2
Refrigerant
RefrigerantR410A1
Refrigerant GWP2,0881
Grants & market
ISDE grant (NL)6,675 €1

How it ranks

SCOP (35 °C): better than 80% of comparable models in our database (Heat pumps · Ground source · ≥ 14 kW; n = 123).

Rank 23 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.

Similar models

Other brands, same type and a comparable size.

More from Clausius

All Clausius models (7) →

How we collect and check this data →

Frequently asked questions

What is the SCOP (35 °C) of the Clausius classic HC 5-25?

The SCOP (35 °C) of the Clausius classic HC 5-25 is 5.55.1,2

Which refrigerant does the Clausius classic HC 5-25 use?

The refrigerant of the Clausius classic HC 5-25 is R410A.1,2

Sources

  1. ISDE heat pump notification code list — Rijksdienst voor Ondernemend Nederland (RVO) · accessed 25 Oct 2026
  2. European Product Registry for Energy Labelling (EPREL) – heat pumps — Europese Commissie · accessed 15 Oct 2026
  3. Water Heater Scheme (heat pump water heaters) — Regulator for Energy and Water Services (REWS)