In order to do that effectively without complication you will want to select a hydronic heating coil which will produce all the heat the space will require - At The Same Water Temperature that the floor radiant will be using.
So if the floor loops and lengths were designed for 105º water - you will want to select a heating coil sufficient to heat the second floor with 105º water in it.
Do you have the heat loss / heat gains calculations done already?
If so; what are they?
If not; how were you expecting to select equipment? <g>
BTW: Why do you want to do it this way? Why take heat out of air, put it into water, and then put it back into air again?
Have you considered Unico equipment? It comes in snap-together modules. Including hydronic heating coils.
PHM
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Originally Posted by
Jbeard9
I am doing something completely different for my own personal use. I am install a 30kw air to water heat pump and wanting to use a forced air hydronic furnace for living space on 2nd floor and radiant heat in concrete on first floor garage/shop. Need help in choosing air handler. Need heating and cooling for 2nd floor and finding a air handler with “chiller” and heating is quite difficult. Do I need different coils for each use?
PHM
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When faced with the choice between changing one's mind, and proving that there is no need to do so, most tend to get busy on the proof.