Dimplex SI brine-to-water (22.9 kW)

Specifications and technical data

Also known as: SI 22 TU

✓ BUS eligibleGround Source (GSHP)ResidentialR407C22.9 kW

Manufacturer	Dimplex
Model	SI brine-to-water
Model code	SI 22TU
Heat pump type	Ground Source (GSHP) All Ground Source heat pumps →
Application	Residential All Residential heat pumps →
Refrigerant	R407C All R407C heat pumps →
Mode	Heating only
Heating capacity	22.9 kW
Max heating output (low temp)	18.6 kW at B-5/W35
COP (heating)	4.4 at B0/W35
Operating range (air)	-5 to 25 °C
Heating flow temperature	up to 58 °C
Electrical supply	380-415V (Three Phase)
Dimensions (H×W×D)	840 × 650 × 655 mm
Operational Weight	184 kg
Sound power level	53 dB(A) (Sound Power LW(A))
Data added	2026-09-23
Data source	Manufacturer documentation (Dimplex)
Verification	Verified by a human
Boiler Upgrade Scheme	✓ BUS eligible — Listed on the Ofgem BUS Product Eligibility List (24 Sep 2026). Grant also needs an MCS-certified installer and a qualifying system design. Funding guide
PEL certificate no.	MCS HP0017/29

Free data sheet (PDF) →

Dimplex SI 22TU brine-to-water ground source heat pump for indoor installation with WPM Econ5Plus touch controller. Seasonal space heating efficiency 181% at 35 C (A+++) and 135% at 55 C (A++). Three-phase.

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Data is compiled from manufacturer sources and may contain errors or gaps. Always confirm specifications with the manufacturer before making decisions.