Download Kelvin User Manual July 23, 2025 17:51 Please click on the link below to download User Manual for Boldr Kelvin Smart Heater Download KELVIN ManualNeed Help?Contact our Tech Support Team at +1 (888) 269-2296, Monday to Friday, 9AM-5PM ET. Related articles What is Shipment Processing Time? How To Power Up The Boldr Klima Smart Thermostat ? Return Policy and Requirements Voltage and Plug Compatibility for Kelvin Pro Series Kelvin's Heating Coverage by Size