Thank you Steve.
I seem to undestood you correctly previously:
Add 5 meters of pipe length per story (for supply) + 5 meters of pipe length per story (for return) = 10 meters total per story.
And add 2 to 3 meters for the pipe length on roof (let's say 3meters).
So for a two story building with basement (basement, ground floor, first floor, roof), if storage is in the basement, and collectors on the roof, one would have:
3stories (basement counted as a story) * 10 meters + 3 meters (on the roof) = 33 meters.
I am wondering, why do you have 60 meters (200 feet), which is almost double than 33 meters?
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