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 typical performance from an inexpensive cyclonic bag less cleaner.
From the base of the machine through the cyclones, there is a loss of 108-60 = 48 CFM. From the cyclones to the nozzle, there is a loss of 60-47 = 13 CFM.
Total airflow losses from the canister base to the power nozzle (held at a 45 degree angle to the floor) is 108-47 = 61 CFM or about 56% of the original airflow.
Last note: the rug plate opening is fairly typical (about 25 square inches), but CFM density is well below average, about 1.9 CFM/Sq. In. If you ever wondered if this inexpensive 12 Amp beast was capable of deep cleaning, I would argue it probably wouldn't be, even with stiff bristles on the brush roll.
Bill
From the base of the machine through the cyclones, there is a loss of 108-60 = 48 CFM. From the cyclones to the nozzle, there is a loss of 60-47 = 13 CFM.
Total airflow losses from the canister base to the power nozzle (held at a 45 degree angle to the floor) is 108-47 = 61 CFM or about 56% of the original airflow.
Last note: the rug plate opening is fairly typical (about 25 square inches), but CFM density is well below average, about 1.9 CFM/Sq. In. If you ever wondered if this inexpensive 12 Amp beast was capable of deep cleaning, I would argue it probably wouldn't be, even with stiff bristles on the brush roll.
Bill
