wyaple
Well-known member
The first two measurements were easy to get, the last one (CFM at the nozzle) required me to build an airflow box. I think this pic should easily illustrate where and by how much CFM is lost in this machine. I think this is good performance from a 1990's designed bagged cleaner.
From the base of the machine through the very short hose to the head assembly, there is a loss of 109-100 = 9 CFM. From the hose connection to the nozzle, there is a loss of 100-71 = 29 CFM.
Total airflow losses from the canister base to the power nozzle (held at a 45 degree angle to the floor) is 109-71 = 38 CFM or about 35% of the original airflow.
Last note: the rug plate opening is slightly larger than average (about 30 square inches), but CFM density is slightly below average, about 2.4 CFM/Sq. In. If you ever wondered if this expensive 12 Amp beast was capable of deep cleaning, I would argue it probably would be, but you might have to go over the same spot more than once.
Bill
From the base of the machine through the very short hose to the head assembly, there is a loss of 109-100 = 9 CFM. From the hose connection to the nozzle, there is a loss of 100-71 = 29 CFM.
Total airflow losses from the canister base to the power nozzle (held at a 45 degree angle to the floor) is 109-71 = 38 CFM or about 35% of the original airflow.
Last note: the rug plate opening is slightly larger than average (about 30 square inches), but CFM density is slightly below average, about 2.4 CFM/Sq. In. If you ever wondered if this expensive 12 Amp beast was capable of deep cleaning, I would argue it probably would be, but you might have to go over the same spot more than once.
Bill
