Based on the experience gained after my first attempt, I estimate that 18 x (0.4mm) Misting Heads (NM40BH-HF-U1) from "CoolMist Systems Australia" can be used with a 10 Gallon (32 Liters) Accumulator (a.k.a. Pressure or Bladder) tank, connected to a 110 L/min, 6.2 bar (58m head-height) water...