Simple installation

1. Simple installation

2. Current Basic Commercial HVAC Systems Fan Fan Speed > • VAV SYSTEM FEATURES • ( One Of Many Types ) • Electric or Pneumatic • or Digital Controls • “In Duct” &/or “At Diffuser” • Locations • Pressure, Temperature • And/Or Flow Sensors • ------------------------------------------- • VAV The Current State • Of Technology • In HVAC ! • Good site to visit & see • animations of various • VAV systems types! • How different systems • work and why ! POSSIBLE MAIN DUCT VAV VAVs partial open Typically 17

3. HVAC General Rules of Installation Distance from InDuct to Air Outlets. Do not exceed 20 meters It’s more of an art than a science. Even the Pros don’t always agree !

4. GENERAL COMMERCIAL “Duct Cell” PLACEMENT. You Have Two Options ! 1] You canplace ALL duct cell units in the “plenum”. OR IF there are reasons that this approach might not work; 2] Then review the duct blueprint and splitthe duct systeminto sections that have approximately the “=< ft2 coverage” of the duct cell you have selected . Then place a cell at any suitable upstream “insertion point” for that section. REMEMBER: Sq Ft coverage ( 8’ ceilings) ~= CFM 300 ft duct Plus an In-line VAV valve Sum-total cfm = 3000 Sum-total cfm=3000 400 cfm 1000 cfm 500 cfm 500 cfm 600 cfm 500 cfm 6000 cfm 400 cfm 1000 cfm 600 cfm 500 cfm

5. 50 ft 32”x 8” 900 cfm 54” x 8” ~3500 cfm Possible cell locations VCD box EXAMPLE # 3 41” x 8” duct 1750 sum cfm Radius Bends Inside Walls • Loading Issues • A/C only runs at night • Return air is Via dead space • Occupancy can spike to 150 2140 sum cfm • Bahrain- Multi Story Bldg - ½ of floor • Total of5,118 sq ft per floor- 3 floors • 8 ft drop ceilings – 10 ft total • 4 air handlers = 2 mains & 2overload • 1 cell guideline 2000 sq ft - very bad air Return air registers