Most times you don't even need a pump if there's enough elevation change. A cleverly placed loop pipe should circulate the water by gravity. I put a loop in a 4-story house a few years back. But that being said it's constantly using energy to heat up the water.
Most times you don't even need a pump if there's enough elevation change. A cleverly placed loop pipe should circulate the water by gravity. I put a loop in a 4-story house a few years back. But that being said it's constantly using energy to heat up the water.