This is a little repetitive of a recent post, for which I apologize, but the usefulness of this calculator deserves emphasis.
https://www.hearth.com/talk/threads/34279/
The calculator is very useful for calculating pump head from coil hx's. Copper is not specifically listed, but I would guess it is very close to the listed "drawn tubing." http://www.freecalc.com/fricdia.htm
Examples -- Coils only:
4 gpm = 40,000 btuh
100' - 3/4" - head = 5.7 ft
150' - 3/4" - head = 8.5 ft
1.5 gpm = 15,000 btuh
100' - 1/2" - head = 7.1 ft
150' - 1/2" - head = 10.6 ft
If flow rate goes up, head increases dramatically. Example: 100' - 3/4" at 6 gpm - head = 11.6 feet
https://www.hearth.com/talk/threads/34279/
The calculator is very useful for calculating pump head from coil hx's. Copper is not specifically listed, but I would guess it is very close to the listed "drawn tubing." http://www.freecalc.com/fricdia.htm
Examples -- Coils only:
4 gpm = 40,000 btuh
100' - 3/4" - head = 5.7 ft
150' - 3/4" - head = 8.5 ft
1.5 gpm = 15,000 btuh
100' - 1/2" - head = 7.1 ft
150' - 1/2" - head = 10.6 ft
If flow rate goes up, head increases dramatically. Example: 100' - 3/4" at 6 gpm - head = 11.6 feet
