MASTERTEMP & MAX-E -THERM MODEL REQUIRED TO HEAT POOL IN 24 HOURS

Description

Pool heaters can be sized by the volume method for maintenance heating or for spot heating. For many days during the swimming season, the sun maintains a desirable ool temperature of 78–80°F. and the pool requires no supplemental heating. However, during cooler periods a pool will usually lose 2–4°F. per day. To get the water to the desired temperature, you could choose a smaller heater and run it during the daily filter cycle of 4–6 hours every day. This would be sufficient to overcome a slight temperature drop between filter cycles, but it would mean leaving the heater on every day. If you don’t use the pool daily, it’s more economical to spot heat the pool, say for the weekend. In this case, you could choose a larger heater which will heat the pool faster, and then can be turned off between uses. With either, maintenance heating or spot heating, you need to determine the size of heater to select and the time it will require to heat the pool.

Pool Sizing

ºF Temperature Change/24 Hrs. Model 175 Model 200 Model 250/250HD Model 300 Model 250/250HD Model 300 Model 400/400HD Model 175 Model 200 Model 250/250HD Model 300 Model 400/400HD
Pool Capacity in Gallons Pool Surface Area in Sq. Ft. at 5.5' Depth
5 85.21 97383 121729 146075 2955 3546 194766 2069 2364 2955 3546 4727
10 42,605 48691 60864 73037 1478 1773 97383 1034 1182 1478 1773 2364
15 28,403 32461 40576 48692 985 1182 64922 690 788 985 1182 1576
20 21,303 24346 30433 36519 739 887 48691 517 591 739 887 1182
25 17,042 19477 24346 29216 591 710 29216 414 473 591 710 945
30 14,201 16230 20288 24345 493 591 32461 345 394 493 591 788
35 12,173 13912 17390 20868 423 507 27824 296 338 423 507 675
40 10,651 12173 15216 18260 369 443 24346 259 295 369 443 591

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