You are needing to select a blower size for a heating situation. The recommended total CFM should not be less than 400 CFM per 12,000 Btu/hr. What is the actual calculated CFM for a fan to be used on a heating load of 45908 Btu/hr. Round your answer to the nearest whole number.

This is homework or test question. Very basic math ratio. Hint-what is ratio of the BTU 's? Multiply X 400.