A hydronic assembly connectable to a building's water and air distribution systems to manage and deliver conditioned air to a unit of the building includes an enclosure including a hydronic coil configured to heat or cool air within the enclosure, a valve control system coupled to the hydronic coil for regulating the flow of water through the hydronic coil, and an air supply booster for circulating air within the enclosure and delivering the same to the unit. The enclosure includes a return air inlet for recirculating air to the enclosure, a supply air outlet for supplying air to the unit, and a return air separation baffle separating the return air inlet air stream from the supply air outlet air stream. The enclosure is removably attachable to the building's air distribution system. The hydronic coil includes piping that is removably attachable to the building's water distribution system.