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In this review of the Viessman Vitocal 350-G ground source heat pump, we look into its features, specs and benefits.
Viessman is a German heating and refrigeration company founded in 1917. It now has 22 production centres in 12 countries and 120 sales offices.
The Vitocal 350-G is one of its innovative ground source heat pump, able to heat water up to 70°C for domestic hot water and/or heating purposes. Read on to find out whether this heat pump is a good fit for your home and heating needs.
The Viessmann Vitocal 350-G works by circulating a thermally conductive liquid solution through piping buried in the ground outside your house. Once the liquid has absorbed the ground’s thermal energy, the solution goes back into the heat pump and is further heated via a compressor, transferred to a heat exchange then circulated around the home as hot water to radiators, underfloor heating and so on.
The Vitocal 350-G is available in 4 models, with outputs up to 84.6kW, making it one of the most powerful domestic ground source heat pumps on the market. It can achieve high flow temperatures of up to 70°C.
The system also includes a control unit that is designed for cooling operation and permits cold water levels to be regulated and controlled. The heat pump comes with Vitoconnect 100, a Wi-Fi interface which enables you to remotely operate your heating system. You can do remote maintenance straight from the app and access the system anytime, anywhere.
The Viessmann Vitocal 350-G starts at about £10,000, which is relatively high compared to the rest of the market. That said, it is also one of the more powerful models on our list, so we think it’s worth the high price tag.
“From my first enquiry to Viessmann for the name of their nearest accredited installer, to the final switch on of my new 151A air source heat pump, the whole experience has been simple and stress free. Now the installation is complete and I am delighted with the quality, quiet and running costs.”
“Quality of this product stands out, affordability can be a issue but when you buy top of the range you might just have to pay a bit more, when the boiler is installed and working, then you can see and hear why you have made the right decision, this is a fantastic boiler, very compact very easy to use, control panel is laid out in a user friendly way, overall very happy.”
“We purchased a Viessmann boiler because we find them to be high quality. It’s also really nice to see that they have great customer service too. I just spoke to Amanda in customer services to request some missing documentation. She picked up the phone within seconds of it ringing and was a joy to speak with throughout. She was swift, efficient and friendly and went out of her way to get me all of the documents I needed and to provide additional, helpful advice. Thanks Amanda!”
Thanks to its high power output, the Viessmann Vitocal 350-G is a great choice for larger homes. It can also be cascaded to make it even more powerful. It’s not the most efficient or quiet on the market, but in terms of sheer horsepower, you would struggle to do much better. This heat pump is also backed up by a great warranty, and from Trustpilot, Viessmann customers seem happy with the service and support they receive.
We considered several factors when reviewing the Viessmann Vitocal 350-G ground source heat pump, including the following weighted criteria: design (20 per cent), durability (20 per cent), efficiency (25 per cent), performance (25 per cent), and guarantee options (10 per cent). We also compared the Viessmann Vitocal 350-G with some of the best outdoor heating systems and ground source heat pumps in the UK in terms of both performance and price.