Green Plumbing

Category - Solar Hot Water

Which of the following are common passive designs for solar heated water systems with the advantage of having no pump?
  1. Vertical grid system
  2. Batch (breadbox) system
  3. Thermo-siphon system
  4. B and C above
Explanation
Answer: D -Both batch, or breadbox, systems and thermo-siphon systems are common passive designs for solar heated water systems. Each of them offers the advantage of having no pump; each also has the disadvantage of being large and bulky. There is no common passive design called the vertical grid system.
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