Fan coil block and grid configuration system

1. An air handling system for filtering air in a building, said air handling system comprising:

a support grid extending along a ceiling of the building and spaced apart from the ceiling to form an air carrying plenum located between said support grid and the ceiling, said support grid configured to support overhead devices, said support grid comprising openings to a room of the building;

fan filter units positioned in corresponding openings of said support grid, said fan filter units to draw air from the plenum and to discharge the air into the room of the building;

a return air chase in fluid communication with at least one of said openings in said support grid and in fluid communication with the room and the plenum to return the air from the room to the plenum; and

at least one fan coil block comprising a fan and a cooling device, said fan coil block supported by said support grid and positioned within at least one of said openings in said support grid at a discharge end of said return air chase, said fan coil block configured to cool the air returned to the plenum from the return air chase.

2. An air handling system in accordance with claim 1 , wherein said support grid comprises:

support elements suspended from the ceiling; and

support rails extending between said support elements to form said support grid and said openings.

3. An air handling system in accordance with claim 2 , wherein said fan filter units are mounted on said support rails and positioned in said corresponding openings of said support grid such that said support elements and said support rails bear the weight of said fan filter units.

4. An air handling system in accordance with claim 2 , wherein said at least one fan coil block is mounted on said support rails and positioned in said at least one of the openings of said support grid such that said support elements and said support rails bear the weight of said at least one fan coil block.

5. An air handling system in accordance with claim 1 , wherein said discharge end of said return air chase is joined to said opening in which said at least one fan coil block is supported.

6. An air handling system in accordance with claim 1 , wherein said fan filter units are interchangeably moveable from one to another of said openings formed in said support grid.

7. An air handling system in accordance with claim 1 , wherein said at least one fan coil block is interchangeably moveable to any of said openings formed in said support grid.

8. An air handling system in accordance with claim 1 , wherein said return air chase is located directly below and extends upward to said support grid, said return air chase located within or adjacent an interior wall that surrounds a room of the building, said return air chase coupled to at least one of said openings in said support grid.

9. An air handling system in accordance with claim 1 , wherein the building has exterior walls and a room surrounded by interior walls, said return air chase positioned remotely from the exterior walls and within the room within the interior walls.

10. An air handling system in accordance with claim 1 , wherein said return air chase extends directly downward from an opening in said support grid to a floor of the building.

11. An air handling system for filtering air in a building having exterior walls, the building having a room surrounded by interior walls, said air handling system comprising:

a support grid held above the room, extending over the interior walls and spaced apart from a ceiling of the building to form an air carrying plenum between said support grid and the ceiling, said support grid configured to support overhead devices and comprising openings to the room;

a return air chase located directly below and extending upward to said support grid, said return air chase located within or adjacent one of the interior walls that surround the rooms, said return air chase coupled to at least one of said openings in said support grid and in fluid communication with the room and the plenum to return the air from the room to the plenum; and

at least one fan coil block comprising a fan and a cooling device, said fan coil block supported by said support grid and positioned within at least one of said openings in said support grid at a discharge end of said return air chase, said fan coil block configured to cool the air returned to the plenum from the return air chase.

12. An air handling system in accordance with claim 11 , wherein building includes at least two adjacent rooms having interior walls that form sides of said return air chase.

13. An air handling system in accordance with claim 12 further comprising fan filter units positioned in corresponding openings of said support grid, each of the fan filter units to draw air from the plenum and to discharge the air into one of the room and the adjacent room of the building.

14. An air handling system in accordance with claim 11 , wherein the return air chase includes a discharge end joined to an opening of said support grid, said return air chase interchangeably moveable from one to another of said openings of said support grid to accommodate changes in an interior of the building.

15. An air handling system in accordance with claim 11 , wherein the plenum constitutes an air carrying non-ducted plenum having a side defined by and spanning across an upper surface of said support grid.