2013 Michael Phelps Swim Spa RX Owner's Manual - Master Spas

Overall Design Information
Specifications for Spa Room Area
Evaporation from spas located inside a temperature controlled room depends mainly on four factors.
• Water temperature
• Humidity in room
• Ambient air temperature
• Area of water surface
The charts below show the evaporation in gallons for a 24 hour period.
First, select the appropriate chart for your model spa. Choose the room temperature in the vertical
column under “Air”. Next, across the row titled “Water Temp F” select the temperature
of the water. In the columns below the water temperature select the nearest common humidity
level. Locate the intersection of the row and column you have selected to find the gallons
of daily water evaporation from your spa. This amount of water will need to be replaced on a
daily basis. Note: Tables assume spa indoors and without cover.
MP Rx 17: Evaporation Rate Gallons per Day (Based on 88.1 sq. ft. of water surface area)
Water
Temp ˚F
84 86 88 90 102 104
Air 50% 60% 50% 60% 50% 60% 50% 60% 50% 60% 50% 60%
72 13.25 11.91 14.54 13.2 15.96 14.62 17.43 16.09 28.17 26.83 30.3 28.96
74 12.77 11.35 14.09 12.64 15.48 14.06 16.98 15.53 27.69 26.25 29.85 28.4
76 12.29 10.74 13.58 12.06 15 13.45 16.47 14.95 27.21 25.67 29.34 27.79
78 11.76 10.11 13.05 11.43 14.47 12.82 15.94 14.31 26.68 25.03 28.81 27.16
80 11.2 9.45 12.52 10.74 13.91 12.16 15.38 13.63 26.12 24.37 28.25 26.5
82 10.62 8.741 12.01 10.03 13.33 11.45 14.8 12.92 25.54 23.66 27.67 25.79
84 9.982 7.981 11.3 9.298 12.69 10.69 14.16 12.19 24.91 22.9 27.03 25.06
86 9.324 7.195 10.64 8.513 12.03 9.906 13.5 11.38 24.25 22.12 26.37 24.25
88 8.868 6.359 10.19 7.652 11.58 9.07 13.07 10.54 23.79 21.28 25.94 23.41
90 7.88 5.473 9.197 6.79 10.59 8.184 12.09 9.653 22.8 20.4 24.96 22.52
MP Rx 18: Evaporation Rate Gallons per Day ( Based on 95.9 sq. ft. of water surface area)
Water
Temp ˚F
84 86 88 90 102 104
Air 50% 60% 50% 60% 50% 60% 50% 60% 50% 60% 50% 60%
72 14.45 12.99 15.86 14.4 17.41 15.95 19.01 17.55 30.73 29.27 33.05 31.59
74 13.93 12.38 15.37 13.79 16.89 15.34 18.52 16.94 30.21 28.63 32.56 30.98
76 13.4 11.72 14.81 13.16 16.36 14.68 17.96 16.31 29.68 28 32 30.32
78 12.82 11.03 14.23 12.46 15.78 13.98 17.38 15.61 29.1 27.31 31.42 29.63
80 12.22 10.31 13.65 11.72 15.17 13.27 16.78 14.87 28.49 26.59 30.81 28.91
82 11.58 9.535 13.1 10.94 14.54 12.49 16.14 14.09 27.86 25.81 30.18 28.13
84 10.89 8.706 12.33 10.14 13.85 11.66 15.45 13.29 27.17 24.98 29.49 27.33
86 10.17 7.849 11.61 9.286 13.13 10.81 14.73 12.41 26.45 24.13 28.77 26.45
88 9.673 6.937 11.11 8.346 12.63 9.894 14.26 11.5 25.95 23.21 28.3 25.54
90 8.595 5.97 10.03 7.407 11.55 8.927 13.18 10.53 24.87 22.25 27.22 24.57
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