The Combustion Blower 399M R1-300-500 from Hot Water Products LLC is a critical component for efficient combustion in heating systems. Designed for models 399M, this blower ensures optimal airflow and combustion efficiency, enhancing the overall performance of your water heating system. Built with durable materials, it is engineered to withstand high temperatures and pressures, ensuring long-lasting reliability. The blower complies with industry standards, making it a trusted choice for both residential and commercial applications. Ideal for replacement or upgrade, this combustion blower is essential for maintaining safe and efficient operation of your heating equipment.