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Hi, I live in a 20-unit self-managed coop. We replaced our water heater 2 months ago – we got the same AO Smith model/size as we had before – and ever since then it has taken FOREVER for hot water to get to apartments (at least 3 minutes until it runs hot, whereas before it took far under a minute). Once the hot water arrives it is plenty hot – scalding even. This is happening in all apartments on all floors. Is there something our plumber could have overlooked during the installation or setup that is causing this distribution delay? What temperature should we be setting the unit at? Any advice much appreciated!