The scenario
A domestic hot water recirculation circuit uses a tankless water heater and a recirculation pump to provide instant hot water at fixtures by returning cooled water to the heater.
What is in this drawing
Read the decisions behind it.
01
Use boiler equipment to represent the tankless water heater
02
Add check valve to prevent reverse flow in recirculation line
03
Model return line as a separate path from fixtures back to heater inlet via pump
Reuse for any residential or light commercial hot water recirculation loop with a tankless heater and dedicated return pump.
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