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Heat pumps · UK

DimplexWI 45 TU

The Dimplex WI 45 TU is a heat pump with SCOP (35 °C) 6.27 and refrigerant R410A.1

Last updated: Technical specifications Rules in the UK ⇄ Compare this model
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SCOP (35 °C)
6.271

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

Refrigerant
R410A1
Official source
Type (source)
Water-to-water1
Official source
Rated output 35 °C
46kW1
Official source
Rated output 55 °C
43kW1
Official source
UK

Rules in the UK

Boiler Upgrade Scheme

Not eligible

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.3,4

  • Must be MCS-certified (product and installer). Check the Ofgem product eligibility list.
  • Rated output 46 kW; the scheme covers systems up to 45 kW.
  • SCOP at 55 °C: 4.5. 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) Water-to-water1
Compressors 21
Capacity control leistungsstufen1
Performance
Rated output 35 °C 46 kW1
Rated output 55 °C 43 kW1
Efficiency
SCOP (35 °C) 6.271
SCOP (55 °C) 4.51
Seasonal efficiency ηs 35 °C 243 %1
Seasonal efficiency ηs 55 °C 172 %1
Noise
Indoor unit sound power 58 dB(A)1
Refrigerant
Refrigerant R410A1
Refrigerant charge 10.9 kg1
Electrical
Max. power input 8.02 kW1
Connectivity & smart
SG Ready Yes1

Manufacturer documentation

  • Manual — Montage- und Gebrauchsanweisung – WI35-45TU (dimplex.eu, PDF)

External links to Dimplex's official website. The manufacturer may change or move documents; where they differ, the manufacturer's latest version applies.

Frequently asked questions

What is the SCOP (35 °C) of the Dimplex WI 45 TU?

The SCOP (35 °C) of the Dimplex WI 45 TU is 6.27.1

Which refrigerant does the Dimplex WI 45 TU use?

The refrigerant of the Dimplex WI 45 TU is R410A.1

How much Boiler Upgrade Scheme grant can you get for the Dimplex WI 45 TU?

Probably none. Rated output 46 kW; the scheme covers systems up to 45 kW.1

Sources

  1. List of eligible heat pumps (BEG) — Bundesamt für Wirtschaft und Ausfuhrkontrolle (BAFA) · accessed 29 Sept 2026
  2. Boiler Upgrade Scheme: what you can get — GOV.UK · accessed 27 Sept 2026
  3. Boiler Upgrade Scheme: guidance for installers (V5) — Ofgem · accessed 27 Sept 2026
  4. Boiler Upgrade Scheme product eligibility — Ofgem · accessed 27 Sept 2026