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  • These analyses are independent of the water-from-air equipment being used.
  • When the water-from-air resource monthly index = 1.00, the expected drinking water production rate from a atmospheric water generator (AWG) at the site should be the same as the machine's specified water-from-air production rate.
  • Water-from-Air Resource annual index grades
        Excellent: Index is greater than or equal to 1.00
        Good: Index range 0.76 to 0.99
        Fair: Index range 0.51 to 0.75
        Poor: Index range is less than or equal to 0.50
  • Estimate the daily drinking water production rate at a site with this method (chilled surface temperature = 5°C; WFAR index less than or equal to 1.00):
    (1) Use water-from-air system's specified production rate (for example: 20 L/day; 2500 L/day)
    (2) Use the annual or monthly Water-from-Air Resource (WFAR) index value from the WFAR chart for your site
    (3) Calculate the factor = (1.8 x index - 0.8) [dimensionless]
    (4) Estimate [L/day] = specified rate [L/day] x factor

    Example: Specified rate = 20 L/day; Index = 0.91; Factor = (1.8 x 0.91 - 0.8) = 0.838; Estimate = 20 L/day x 0.838 = 17 L/day.
  • When the water-from-air resource index is greater than 1.00, the machine's maximum water production rate is constrained by the equipment's cooling capacity (for example, atmospheric water generators which are dehumidifiers condensing water vapour onto chilled surfaces). It is safest to say production rate = specified rate.
- Site climate classifications on the charts are from the Köppen-Geiger Climate Classification (2006 version) -
  • If you cannot find your location in our product list below, please send a message to atmoswater@gmail.com. We will produce a new Water-from-Air Resource chart and inform you when it is ready to purchase (usually within 2 days).
Picture
Water-from-Air Resource Chart for Vancouver, BC, Canada showing the type of information you would get on the chart for your location. Click on chart for larger image.
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