Tank in tank or Coil?

Rocky_3

usually. If you look at the respective literature, I think you will find the pump head to be less with the tank style water heaters. The coils usually present a larger pressure drop. Also, often as the size of the tank increases, the size of the heat exchanger also increases, where sometimes with a coil-type, the coil stays the same, but the size of the domestic reservoir increases, so your heat exchanger does not neccessarily increase in size. Just a couple things that I've found.

Regards,
Rocky

adambuild

?

Any major advantages between either a tank in tank indirect or one with a coil. For example a TT Smart vs. HT SuperStor Ultra?

Thank in advance, Adam

Charlie from wmass

hard water needs addressed

I prefer the tank in tank but I have had issues when the water was hard. the company I used always stood behind their items so I can not say a bad word about them. I now require a water test, which I should have been doing, for all indirect units I install.

Nick S

Speaking of hard water, I installed a super stor ultra last year that is already full of lime. I'll have the water tested from now on.

kpc_18

you will have ...

problems w/ anythig sooner or later w/ hard water issues. It was my understanding that the tank-in -tank design was better suited to deal w/ hard water because the unside SS tank actually flexed to flake off any scale...perhaps that is marketing....kpc