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How much should a recirculation pump run?
Faster hot water is appealing, but keeping water moving through the pipes can also mean more pump runtime and heat loss. I’m curious how people decide whether demand-based, timer-based, or continuous control makes sense for a water-heater recirculation system.
Does the setup use a dedicated return line, or a crossover valve that sends cooled water back through the cold line? I’d expect that layout to affect both how quickly hot water arrives and which controls are practical. What installation or manufacturer constraints are worth checking before choosing a control strategy?
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For irregular use, I’d lean toward demand control; for a reliable morning rush, a timer may be the easier compromise, though it can run when plans change. I’d choose continuous operation only if having hot water ready throughout the day matters more than the extra runtime and heat loss. The return-line or crossover arrangement may limit which options are practical, so I’d check compatibility before settling on one.
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