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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