Solar Isolation Chart

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Solar Insolation Chart

Sizing Factor

Using the map above, find your location, then choose the two digit Sizing Factor. If you are located in between two or more numbers, use the average. When in doubt, use the larger number. Use this number in section E of the Simplified Sizing Guide.

Your Swimming Season

Use the map above to determine your zone and the table at right to determine the length of the swimming season for your unheated pool.

Zone	Swimming Season
1	12 mos.
2	10-11 mos.
3	9 mos.
4	8 mos.
5	6 mos.
6	4 mos.
7	3 mos.


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