I'm in the market for an indirect water heater. The tank we have is 19 years old* and I don't want to awaken one morning with a 1/2" of water in the basement, since these tanks are rated for about 8 years. I know, actual results may vary. So, I narrowed it down to four brands: Dunkirk, Heat-Flo, iBC and TriangleTube. Their return rates are similar, all are stainless and have top tank connections, the last being important to me since I don't want horizontal pipes that low. Some points: our Burnham boiler has a BTU output of around 107,000 which is under some of the products specs, so my return rates will be somewhat lower. The surface heating area on the TriangleTube is superior since it's a tank-within- a-tank design, but others such as the Peerless Partner have similar surface areas. I know there are customer service and warranty issues with Bradford/White, TriangleTube and Weil-McLain. For some reason of late Weil-McLain has been having quality issues but nothing on the order of Burnham Boilers. We have hard smelly water which is largely controlled and would prefer not having an anode rod since they're not easily serviced and can actually cause problems. Thoughts? Thankee in advance. *Edited from 14 to 19 years. It pays to check.