KELVIN Large by Boldr is an affordable, smart, and elegant electric infrared heater. KELVIN heats using infrared technology, which is 30% more cost-effective than a conventional convection heater. The heater can be connected to a smart home app with energy-saving features that help you save money and live more sustainably. KELVIN heaters are maintenance-free, and their functionality is continuously improved through software updates. A heater that gets better over time. Each KELVIN heater comes with a wireless smart thermostat. It measures temperature and humidity and requires no wiring or installation. Simply connect it to the app and measure the temperature in your home with the highest accuracy. Heats up to 18 square meters.