Heat pump
Viessmann + Therilly
Coming soon: AI control of Viessmann Vitocal by the hour of the electricity price.
We are working on an integration with the ViCare app and the Viessmann Developer API. Once in place, Therilly reads operation, setpoints and hot water on your Vitocal and shifts heating and hot-water charging to the cheapest spot-price hours. Using the weather forecast we preheat the home ahead of a price peak — an estimated 15-30 percent saving with no impact on comfort. Support is being built; sign up for the waitlist and we will notify you at launch.
What you get
- Planned support for Viessmann Vitocal 250-A, 222-S, 200-A and 300-G (air-to-water and ground-source)
- Connects through the ViCare app and Viessmann Developer API
- AI shifts heating and hot water to the cheapest spot-price hours
- Weather-driven preheating before price peaks — estimated 15-30 percent savings
How to get started
- Join the waitlist and select Viessmann as your heat pump.
- We will notify you when the ViCare and Viessmann Developer API integration is ready.
- At launch, connect your ViCare account and switch on Therilly control.
Supported models
- Viessmann Vitocal 250-A
- Viessmann Vitocal 222-S
- Viessmann Vitocal 200-A
- Viessmann Vitocal 300-G
Common questions
Do I need to install anything? For Viessmann, just sign in to Therilly and grant access. No local software, no firmware updates.
Can I turn the AI off any time? Yes. One click hands full control back to your existing app. Therilly never gets in the way.
Frequently asked questions
- How do I connect Viessmann to Therilly?
- Join the waitlist and select Viessmann as your heat pump. We will notify you when the ViCare and Viessmann Developer API integration is ready. At launch, connect your ViCare account and switch on Therilly control.
- Do I need to install any hardware?
- Usually not. If you already have a power meter like Tibber Pulse, Shelly EM or HomeWizard P1, signing in to Therilly is enough. If you don’t have a meter, we recommend HomeWizard P1 which requires no electrician.
- Can I control the pump myself any time?
- Yes. You can pause Therilly at any time and take back full manual control via the pump’s normal app. Therilly does not take over — it sits on top.
- How is the heat pump connected?
- Depending on model, either directly via the manufacturer cloud (Qvantum, Mitsubishi MELCloud) or via Home Assistant or Homey Pro. The connection takes 2–5 minutes and only requires that you sign in with your existing account.