Abstract: Method and system disclosed herein provides generating a three-dimensional construction grid based on a data file generated by an architectural software, wherein the three-dimensional grid includes three-dimensional position information of various structural building components; displaying the three-dimensional construction grid using a display device of a computing device; receiving information of various non-structural building components, the information including location of the non-structural building components on the three-dimensional grid; associating the non-structural building components to one or more of the structural components of the three-dimensional grid; and automatically generating a plurality of specifications for the non-structural building components.

Abstract: Rooms of a building are provided with an air distributing ceiling and plenum chambers thereabove. Treated air is pumped to the plenum chambers where it passes through the ventilating ceiling to heat or cool an enclosed area below. A recirculation system permits withdrawal of all of the treated air from the enclosed area. The withdrawn air is recirculated after mixing with freshly treated air. The air is treated by passing a portion thereof over a heating or cooling coil while the remainder bypasses the coil. The mixture of treated and bypass air is pumped at a high rate into the plenum chambers where a static pressure such as 1 inch of water exists.