Vaillant | Sustainable Technology | Smart Renewable Heat


Founded in 1874 by Johaan Vaillant in Remscheid, Germany, Vaillant have been on the forefront of the heating and ventilation technology industry ever since. Vaillant prides themselves on being a family-owned company.

With a presence in over 20 different countries, Vaillant is the second largest European manufacturer in the heating technologies sector. As the demand for sustainability increases, they have focused their developments on products and systems that use renewable energy, in particular, heat pumps.

Smart Renewable Heat are Vaillant Advance Partners and can therefore offer you exclusive extended Guarantees providing our customers with an enhanced 7-year parts and labour manufacturer warranty, including all Vaillant branded cylinders. In addition, customers benefit from a market-leading 10-year compressor warranty for ground source systems for complete peace of mind.

vaillant arotherm smart renewable heat

Vaillant aroTHERM

Vaillant air source heat pumps come in different sizes of 5kW, 8kW, 11kW and 15kW

 5kW  8kW 11kW 15kW
Maximum heating capacity  (@45ᵒC flow, air temp -3C) 6.28 kW 5.81kW 7.3kW 11.5kW
Maximum flow temperatures (ᵒC) 60 63 63 63
Electrical data
Phase / Voltage 1 / 230V 1 / 230V 1 / 230V 1 / 230V
Max operating current 15A 16A 20A 25A
Fuse 16A 16A 25A 25A
Dimensions (outdoor unit)
Width 970mm 1103mm 1103mm 1103mm
Depth 408mm 463mm 463mm 463mm
Depth 408mm 463mm 463mm 463mm
Weight (kg) 90kg 106kg 126kg 165kg

vaillant flexoTHERM smart renewable heatVaillant flexoTherm

The Vaillant flexoTHERM, a ground source heat pump in sizes of 5kW, 8kW, 11kW, 15kW and 19kW

5kW 8kW 11kW 15kW 19kW
Maximum heating capacity  (@45ᵒC flow)* 5.3 8.5 11.4 14.1 19.6
Maximum flow temperatures (ᵒC) 65 65 65 65 65
Electrical data
Phase / Voltage 1 / 230V 1 / 230V 1 / 230V 3 / 400V 3 / 400V
Max operating current 16.6A 23.8A 29.6A 25.2A 30.4A
Start current
Fuse 20 25 32 32 32
Dimensions (mm)
Width 600mm 600mm 600mm 600mm 600mm
Depth 595mm 595mm 595mm 595mm 595mm
Height 1183mm 1183mm 1183mm 1183mm 1183mm
Weight 157kg 173kg 185kg 187kg 200kg

smart renewable heat“I would like to put on record how impressed we were with the help, understanding and reaction we received – which was fast, friendly, sympathetic and professional.”

Bill E.

Planning to build or renovate a property? Our free guides will help.

Smart Renewable Heat

We are the UK’s leading heat pump installer, specialising in new build and renovation projects, or large-scale residential and commercial developments. We also work with homeowners and business owners to help them switch from traditional to renewable heating technology. With over 3,000 projects behind us, Smart Renewable Heat will be your trusted heat pump partner.

Each property is unique, and may benefit from a Ground Source Heat Pump, Air Source Heat Pump, or even a Hybrid Heat Pump. Our experts will help you make the right choice, and deliver the installation on-time and on-budget. Our unbeatable aftercare package will ensure that your heat pump system operates to full capacity all year round.

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