Mechanical water, or condensate water, is distilled water produced by refrigeration and air-conditioning systems. Most often, this water is fed into a hose or copper line that discharges into the ground or local sewer/septic system. However this water can be treated in much the same manner as collected rainwater.
Costs are generally low, mechanical water is already being generated in most buildings with a HVAC system. Diverting to a rain tank or rain garden can supplement these systems during hot, dry summers.
Mechanical water, or AC condensate, is a consistent, reliable, and high quality source of water in hot summer months. It can easily supplement other methods of water harvesting and re-use.