Plans / pics are attached

Exterior walls are SIPs R-24 with 1-1/2" EPS stucco
Center 'bumpout" is typical 6-9 stick with 3" EPS (interior to be sprayed)

WIndows are Integrity Low E3

window wall south facing

Proper way to heat and cool

We are in the process of building a very open floor plan home with catheral ceilings in CT (zone 5) with 2 levels.

Main level - 9-17' ceilling heights
Lower Level ( Walkout) has radiant in an exposed slab and footings over 2"EPS.

One the main concerns has been heating the rounded window area. the roof line closes up and limits the duct work.access.

Originally we were going to use one hydro air handler on the main level and run a center trunk line via a false beam box thru the center of the home. Since we have elimiated this'beam / chase, we have effectively cut the house in to with only a very limited chase in the attic.

We were always going to need to units and logically it seemed there would be one unit for each level.

I proposed 2 hydro units upstairs, one that conditions the 2 bedrooms / master bath / and would have the shortest direct duct towards the bump area. Then the 2nd unit would provide the shortest direct duct run for the opposite wall in the LR towards the bump, the DR, K, pantyr, and then would provide cooling only to the lowere level FR, bed/bath.

It is confusing and hopefully the pictures clarify the plans attached

Manual Js I'm being told anywhere from 3-4Ton , somethings not right

Am I going in the right direction? Overkill

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