The new 4200w star vacuum cleaner has more wattage than the old ISSA 640 but the air flow litres per second is lower than the Issa Also the new one only holds 60 litres and the old one holds 80.
So my question is the old vacuum cleaner has more sucking power than the new one am i right
The two stage bi-pass motors for both machines are manufactured by the same OEM.
In our tests prior to changing manufacturers and from reports from customers that have purchassed both types from us the new machine has greater suction power (approx 15% greater).
The original machine may have held more dry debris but the new machine holds 5 litres more wet debris.
The capacity is irelevant as it is highly unlikely that the machine would ever be filled to capacity from clearing gutters, as the weight of the machine would inhibit movement across grass etc. even at 3/4 full the likley wet debris weight would be in the region of 150lb. On a very large contract it would be good working practice to empty the machine several times and remove the more often than not mud.
Grip
Please telephone and book a demonstration if you are seriously consiidering purchasing a system as hypothetical questions and answers have little to do with real life situations.