Maybe for dew collectors they could add slots like the tool slots in benches and forges.
The slots would allow 1,2 or 3 filters.
With 1 filter, no heat(activity) increase. Each slot holds 1 jars per day.
With 2 filters, heat(activity) increases to same as one forge. Each slot holds 2 jars per day.
With 3 filters, heat(activity) increases to same as two forges. Each slot holds 3 jars per day.
or
They could add a fuel slot.
Without using fuel it creates the 3 jars per day and no heat(activity) increase.
With fuel it uses the heat(activity) increase but increases the speed or the amount of water per day. Dealers (TFP) choice.
Just spitballing ideas here to see if anything sticks.
My suggestions may have hidden problems I don't see as of now.