Why do people NOT like tankless?
1. Expense.
2. The promised energy savings are a myth.
3. Tankless hwh require annual flushing. While simple it is necessary.
4. The cold sandwich effect. Let's say you take a shower first, the water flows, the flow sensor turns the heater on after a moment delay, the pipes clear of cold water and you get hot. Your wife takes a shower ten minutes after you. Nice and hot! Then a blast of cold(er) water until the pipes fill again with hot.
You can get a circulating pump to correct this, this will more than negate any standby savings.
Why DO people like tankless?
1. Space savings
2. Endless hot water.
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