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Green Plumbing

Category - Solar Hot Water

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In terms of ideal placement for solar water heater collectors, which of the following is not one of the methods for finding true south?

Sundial extrapolation method
Compass
“Solar noon” method
GPS device

Explanation

Answer: A - Trying to find true south by extrapolating from the shadows on a sundial would prove useless. The other three methods - using a compass, GPS device, or the “solar noon” method - would each allow a user to find true south and thus place the collectors in their ideal positions.

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