Quote:
Originally Posted by JRcorvette
You can’t do that because a tankless does not really store any hot water. It only works when you have a tank full of hot water.
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That is somewhat inaccurate. Yes a tankless system does not store hot water. But water is stored in the pipes from the heater to your various faucets through out the house. When you call for hot water that water in the pipes is typically cold and that's what you get until the new hot water can push it out of the faucets. A recirculating pump removes that cold water and pushes it back into the cold water in front of the water heater. Without the cold water in it's way the hot water can reach the faucets faster.