These Laars hot water boilers are american made, great quality machines! These are rated for 325,000 BTU/H and are already set up to operate at Salt Lake elevation. They run on natural gas and are perfect for heating a pool, running a heater driveway, or doing any type of hot water loop heating. I pulled at three of there out of a super high end home before they remodeled and they were used for a heated driveway setup. I can give you the Extrol expansion tanks to go with them and a bunch of extra copper piping if you want it, as well as venting materials and one way valves. Also have several grundfos pumps that were used to circulate the water so if you need those we can make a deal to add them in. Basically this is an outrageous deal on high quality boilers. New units are 5-10k each so 750 bucks for one of these is killer. The expansion tank alone goes for $700 online right now. Can even deliver them if you need it for a fee. Also open to trades or deals.