swyman wrote:So I am still figuring out different ways to plumb this thing when my addition gets completed and was thinking I needed to clean or replace the side arm heat exchanger on my hot water heater then it hit me.....Duh, my boiler has a built in domestic hot water coil! So my question is does this thing really work well? By the numbers I think it's 6gpm so as long as I flow less than that I will have infinite hot water, assuming the boiler stays at temp? How hot will the hot water get? If this works it would be so nice to get rid of that 70 gallon hot water heater (was a gas but valve quit working so I just kept it hooked up for winter since it's hooked to side arm exchanger, I run a 40 gallon electric in the summer).
For those that have theirs hooked up, how do they work?
The DHW coil in my Kaa-4-1 works very well. The 30 gallon propane water heater did not run much at all during the winter months.
I will suggest that you install an Watts Series 70A tempering valve on the outlet side of the coil to prevent scalding as I had done with mine -its in the National Plumbing Code too.
Don't make the same mistake I did and not have a second set of unions sweated in to allow a clear installation/linear path for the coil loop as they are very long and you have to be careful not to ding the copper coil.
About the picture you uploaded- is this where you are beginning the construction for the basement BILCO door?