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Old 12-16-2022, 08:59 AM
Rheinl271 Rheinl271 is offline
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The tankless heaters are two stage based on flow demand. With just the shower running likely with flow restrictor it will take two minutes at least to get hot. Heater runs on low output. If you run two faucets in the bathroom, the heater kicks in to high output and you get hot water in 30-40 seconds. Plumber explained how it works.