[James444]

I know that gas tankless DHW has had big-time usage outside of the US for a long time, but I didn't know anything about the electric version, so I took a look at them on the web. They have a well-constructed site which makes it fairly easy to get a quick estimate of what's needed to get it done. Based on the fact that electric water heating technology has been around for a long time, it would seem to be fairly bulletproof (I saw a mention of lifetime warranty for some of their models). So it probably comes down to the purchase/installation cost, versus what you would save per year * expected years living there. Would you be replacing an electric tank, or is it fossil boiler-based DHW? One obvious question is usage - is it fairly low for your household? It's fairly low for ours, and it sticks in my craw that we need to have a giant tank of hot water "standing by" 7/24, for just occasional use (along with a non-condensing boiler that also needs to always keep itself hot). Another by-product of (formerly) cheap oil resulting in our country standardizing around a wasteful DHW technology. Have you also considered the possibility of solar DHW? I kick myself often for not installing solar years ago - it would have paid for itself multiple times by now.