Five heat loops but a single zone. This is a the way to do an economical radiant heat install. I’m a hydronic heat aficionado, the quality of warmth is so preferable to forced air. The key is to do it without making it into some ridiculously costly venture, and we’ve mastered this by tackling the labour intensive part and using a modular kit for the rest. The heat source is then just a slightly costlier model of a tank you need to buy anyway and suddenly you’ve got a system.
Ready to inspect and maybe pour too…