I joined the hydronic install crew as many hands make that task way easier. Essentially we zip tie a bunch of hoses to the rebar and then pour the slab. What is interesting is how much the boutique home builders charge for this service vs what I actually install it for my clients. It appears the luxury home buying customers don’t mind paying a 300% markup on a radiant heating system. I think what they do is get a sales staff member upsell the system from a show home and they pay a huge commission. At $20000 there is a lot of money to be made in hydronic. Fortunately my custom clients just pay the install price and a management fee and after they move in the floor will be warm and cozy.