Originally Posted by SKIP4661
You have to consider that the infloor radiant runs at a cooler temp than the baseboards. If you run 180 degree water through the radiant you won't be able to walk on the floor. Typically a separate tempered zone is ran for radiant floor heat using a separate heat exchanger or tempered with return water using a mixing valve.
So there is no easy answer...
Now, I've seen a sketch of a system that just replaces a baseboard unit with a radiant system on the same loop. The radiant system is separates from the rest of the loop by a mix valve. Is the mix valve some thing that gets input from a thermostat or is it something that gets inatlled and 'buried' in a wall or floor? Would a circulator pump be needed in this sort of a setup? Did I image the sketch and a seperate zone is needed?