Thank you for the reply Steve.
I do not have a particular swh system in mind.
For example, let's say I have three collectors (each one 20 square feet of area (1.85 square meters)): 3 * 20 = 60 sq ft (5.58 sq m).
And the total flow is: 0.02 l/s/m2 * 5.58m2 = 0.12 l/s = 6.7l/m
6.7 liters/minute = 1.77 gallons/minute
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