Overall Length _____Ft X Overall Width _____Ft X Shape Multiplier _____ =
(Alternate method: Pool Gallons / 7.48 / Average Depth = Pool SqFt)

(A). _____ SqFt

Table 1

Table 2

B. Where will the panels be installed?
Check the orientation of the roof area with a compass, refer to Table 2 above and select an Orientation Multiplier.  Solar panels can face up to 30° East or West of True South for optimum efficiency.  Panels can not face in a northerly direction, unless supported by a rack to elevate the system towards south. See the Solar Pool Heater Installation Manual for precautions on installing on a flat roof.

(B). _______

C. Is the pool shaded?
Determine the percentage of shade on the entire pool during the Solar Day (9 am - 5 pm), refer to Table 3 below and select a Shade Multiplier.  If only a portion of the pool is shaded for part of the solar day, then a Shade Multiplier should be extrapolated from the table (i.e. 50% of the pool shaded for 50% (4 hours) of the solar day equals 25% or a multiplier of 1.10). Indoor pools should use 100% shade multiplier.                            

(C). _______

Table 3

D. Does the pool have a screen enclosure?
If the pool has a screen enclosure, use a Screen Multiplier of 1.25
If the pool does not have a screen enclosure, use a Screen Multiplier of 1.0

E. Determine the Sizing Factor for your Region and Pool Season desired, from the Table below. For areas other than Florida, refer to the Solar Insolation Map for the correct Sizing Factor.

Season Multiplier

(D). _______

(E). _______

F. Multiply (A) X (B) X (C) X (D) X (E) to get the required square footage of solar panels.
Measure the area where the panels will be installed to determine which size panel will fit. Determine the number of panels required below (round to nearest whole number):

(F). _______

Sq. footage (F) from above: _______

or
or

div. by 32 = ___ 4Ft X 8Ft Panels
div. by 40 = ___ 4Ft X 10Ft Panels
div. by 48 = ___ 4Ft X 12Ft Panels