Shipments of unitary central air conditioning or direct expansion (DX) central air conditioning systems showed a promising growth during past few years, with a CAGR of nearly 7% during 2012 to 2016 period. Further, this segment is estimated to grow with a projected CAGR of 6.7% between 2017 and 2021, mainly attributed to the anticipated growth in the new residential construction activity and strong growth in demand for replacements. On the other side, shipments of the central plant air condition 更多
