While I agree that each pool will consume a different amount of FC in a given day, that would not affect the data UWV would like to see.
I think he is asking how the amount of FC produced (not consumed) affects the lifespan ... would an IC40 producing 0.7 lbs/day last twice as long as an IC20 producing 0.7 lbs/day.
Yes, I think that while my post does not say that, it would suggest it. If so, that would certainly make a great case for going very large on the cell. As the lifespan of a cell would be #### lbs of FC over its life.
I think with proper water chems that the cell output would remain what the manufacturer claims through MOST of the cells life. And i believe that over-sizing of the cell is SOP.
But, what this ignores though is how the pools chemistry is affecting the cell itself...
Thats why you could never get accurate data throughout ... so maybe the lifespan is more tied to the amount of time it is exposed to the water.
Not really, because the cell wont be running the whole time it is exposed to the water, i.e. when the pump is off, it is still exposed to the water, or in your example running at 50%. Lets not forget that 50% is half the run time at 100%, not 50% output.... Meaning an IC20 and IC40 should function for #### amount of days ... but the IC40 could produce double the FC that the IC20 could in the same amount of time.
Thats what i posted earlier...
More than likely, the true life span is a combination of these possibilities ... amount of FC produced & # days exposed to water.
I think that is an accurate statement, however, Pentair cant tell how you will be "treating" the cell, so they can't include that re: longevity.
I think you are looking for a solid "it will last this many days" And i don't think you can get that number given so many variables that will affect longevity.
Of course at this point we are probably destined for the Deep End