Is CFM or MPH better for a leaf blower?

Answered by James Kissner

When it comes to choosing between CFM (cubic feet per minute) and MPH (miles per hour) for a leaf blower, it’s important to understand the differences and consider your specific needs. Both CFM and MPH play important roles in determining the effectiveness and efficiency of a leaf blower.

CFM refers to the volume of air that the blower can move in a minute. It indicates how much air the blower can push out at a given time. A higher CFM means a greater volume of air is being moved, which can result in a larger area being covered by the blower. This is particularly useful when you have a large area to clear, such as a large yard or a commercial space.

On the other hand, MPH refers to the speed at which the air is being pushed out of the blower. It measures the velocity or force with which the air is being expelled. A higher MPH indicates a stronger gust of air, which can be effective in moving heavier objects like wet leaves or small debris. This is especially important if you often deal with stubborn or compacted debris.

To determine which is better for a leaf blower, it’s important to consider the specific tasks you will be using it for. If you primarily need to clear a large area of leaves, grass clippings, or light debris, a higher CFM would be more beneficial. The larger volume of air being moved will ensure that the debris is effectively blown away and covers a wider area.

However, if you frequently encounter heavier or compacted debris, such as damp leaves or small stones, a higher MPH will be more useful. The increased force of the air will help dislodge and move these heavier objects more effectively. In such cases, the distance the debris travels may not be as important as the power to move it.

It’s worth noting that some leaf blowers offer adjustable settings for both CFM and MPH, allowing you to customize the airflow based on your specific needs. This can be particularly useful if you have varying types of debris or different areas to clear.

Personal experience: I recently had to clear a large yard filled with fallen leaves after a heavy storm. I initially used a leaf blower with a high MPH but low CFM. While it was able to move the leaves in a small area, they quickly settled back down due to the limited airflow volume. Switching to a leaf blower with a higher CFM made a significant difference. The increased volume of air moved the leaves more effectively and covered a larger area, making the task much quicker and efficient.

Both CFM and MPH are important factors to consider when choosing a leaf blower. CFM determines the volume of air being moved and is more beneficial for covering larger areas, while MPH indicates the force or velocity of the air and is useful for moving heavier or compacted debris. The ideal balance between CFM and MPH will depend on your specific needs and the types of debris you regularly encounter.