MASTERTEMP AND MAX-E -THERM MODEL REQUIRED TO HEAT THE SPA 30°F

Spa Sizing

Spa Volume (Gallons)
Model 200 300 400 500 600 700 800 900 1000
Minutes for 30o F Temperature Rise
174 21 31 40 50 61 71 81 91 102
200 18 27 35 44 53 62 71 80 89
250/250HD 15.8 23.5 30.8 38.5 46.5 54.3 62 70 77.8
300 13.5 20 26.5 33 40 46.5 53 60 66.5
400/400HD 9 13 18 22 27 31 35 40 44

Note

Note The chart is based on a 30o F (16.6o C temperature rise, discounting losses and only based on heat required to raise temperature in minutes.Two-year limited warranty. See warranty for details.
* ASME models available, Please see your Pentair Aquatic Systems Representative for details.
* For Commercial Heaters 500,000 BTU/hr and over please contact factory for sizing

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