Practice Quiz

Green Plumbing

Category - Solar Hot Water

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Which of the following requires the most heat gain?
  1. Incoming water temperature of 60⁰ F to heat a swimming pool to 85⁰ F
  2. Incoming water temperature of 50⁰ F to heat water in a water heater to 125⁰ F
  3. Both require equal heat gain
  4. Cannot answer with the information available
Explanation
Answer: B - Heating water to 125⁰ F from a starting point of 50⁰ F incoming water temperature requires a heat gain of 75⁰ F. The heat gain required for the swimming pool response is only 25⁰ F (85⁰ F minus 60⁰ F). The volume of water to be heated is not a factor.
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