wyaple
Well-known member
First off, thanks to Devin for providing the two actual measured readings. He works in a store that actually sells Miele products.
By The Numbers:
141 Motor CFM: This is provided by the manufacturer and reflects the maximum motor airflow when not installed into the machine body.
111 CFM at the canister base: After installing the motor into the canister base with all bags and filters, this is my estimation of the remaining airflow.
101 CFM at the hose end: This is the measurement taken with the hose stretched out as straight as possible.
95 CFM at the wand end: This is the measurement taken with the hose stretched out and the wands opened up to approximately three feet.
85-89 CFM at the nozzle end: This is my estimate of the airflow after passing through the final connections and u-joint at a 45 degree angle.
Total (estimated) airflow losses from the canister base to the power nozzle (held at a 45 degree angle to the floor) is 111-87(averaged between 85 and 89) = 24 CFM or about 22% of the original airflow. Of course as the bag fills, the airflow will drop in addition to more losses depending on how the hose is coiled.
Comments welcome of course.
Bill

By The Numbers:
141 Motor CFM: This is provided by the manufacturer and reflects the maximum motor airflow when not installed into the machine body.
111 CFM at the canister base: After installing the motor into the canister base with all bags and filters, this is my estimation of the remaining airflow.
101 CFM at the hose end: This is the measurement taken with the hose stretched out as straight as possible.
95 CFM at the wand end: This is the measurement taken with the hose stretched out and the wands opened up to approximately three feet.
85-89 CFM at the nozzle end: This is my estimate of the airflow after passing through the final connections and u-joint at a 45 degree angle.
Total (estimated) airflow losses from the canister base to the power nozzle (held at a 45 degree angle to the floor) is 111-87(averaged between 85 and 89) = 24 CFM or about 22% of the original airflow. Of course as the bag fills, the airflow will drop in addition to more losses depending on how the hose is coiled.
Comments welcome of course.
Bill
