Webasto Thermo Pro 90 Diesel Coolant Heater Kit with Box, 24VParts Number: 5010873A Webasto Thermo Pro 90 Diesel Heating Kit with Box (24V) is a powerful and efficient heating system designed for preheating large engines and providing cabin warmth in demanding cold weather environments. Delivering 31,000 BTU (9. 1 kW) of heating power, this coolant heater is ideal for heavy duty vehicles, construction machinery, and marine applications. Its box enclosure adds extra protection, ensuring durability and