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Heat pumps · UK

Sirac LSQ10RW

The Sirac LSQ10RW is a heat pump with SCOP (35 °C) 4.17 and refrigerant R407C.1,2

Last updated: Technical specificationsRules in the UK⇄ Compare this model
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SCOP (35 °C)
4.172

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
26kW2
Official source
Rated output 55 °C
24kW2
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 26 kW; the scheme covers systems up to 45 kW.
  • SCOP at 55 °C: 3.62. 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 °C26 kW2
Rated output 55 °C24 kW2
Efficiency
SCOP (35 °C)4.172
SCOP (55 °C)3.622
Seasonal efficiency ηs 35 °C164 %2
Seasonal efficiency ηs 55 °C142 %2
Energy label 35 °CA++2
Energy label 55 °CA+2
Noise
Indoor unit sound power54 dB(A)2
Refrigerant
RefrigerantR407C1
Refrigerant GWP1,7741
Grants & market
ISDE grant (NL)6,600 €1

How it ranks

SCOP (35 °C): better than 3% of comparable models in our database (Heat pumps · Ground source · ≥ 14 kW; n = 123).

Rank 120 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.

Guides on heat pumps

How we collect and check this data →

Frequently asked questions

What is the SCOP (35 °C) of the Sirac LSQ10RW?

The SCOP (35 °C) of the Sirac LSQ10RW is 4.17.1,2

Which refrigerant does the Sirac LSQ10RW use?

The refrigerant of the Sirac LSQ10RW is R407C.1,2

How much Boiler Upgrade Scheme grant can you get for the Sirac LSQ10RW?

£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. 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. 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