I'm trying to decide on which boiler size and brand to put in my shop that I'm just completing. The shop is 40 x 60 with 12 foot side walls, I have 2200 feet of Pex in the concrete already. I have been looking at a LP 157k Laars Mascot combi boiler that can be used for the floor heat and for hot water that I will need in the shop also. Looking for some input if this is the correct BTU range and input on a good unit to install.