NiteWalkerGR said:
I didn't think this sound right so I double checked.
CT MIDI I filter surface area: 3898 cm² (604,2 sq.in.)
CT 26/36/48 filter surface area: 5300 cm² (821,5 sq.in.)
So certainly more surface area, but not twice as much.
Riigth.
Not sure where I got the "twice" number, possibly remembered the filter "window" area - where the air comes in - there the difference is bigger and close to 2x. That is what influences the gag peroformance and is probably why - in my experience - the CT 36 holds up suction a bit better than compared to the MIDI I/CT15. The difference is certainly more than the miniscule difference in specs indicates. But also nothing game-changing.
And I wouldn't call the 26/36/48 heavier duty at only 7cfm more and identical static lift.
Heavy duty as in not stronger/faster but as in "built like a tank" and suited for high duty cycle operation. The plastics and most parts of the CT26+ series are just overbuilt compared to most stuff I see on the market. That vac series is absolutely more heavy duty when compared to the CT MINI/MIDI series and most of the competion as well.
Whether that matters for one is another question.