to air conditioning terminals located throughout a building terminal 10 includes a plenum section 12 defined by opposed sidewalls 14 and 16 top wall 18 and opposed end walls 20 and 22 end walls 20 and 22 are preferably provided with openings 24 and 26 so the terminals may be connected end to end to form a total air conditioning system the terminal further includes a lower section 28 having opposed spaced end walls 30 and 32 side walls 34 and 36 in combination with the end walls define therebetween an air passage inflatable dampers not shown are partially disposed in the air passage and partially disposed in the plenum section the inflatable damper is employed to regulate the quantity of air discharged from the terminal the terminal further includes a diffuser section 38 preferably comprising side diffuser members 40 and 42 and a center diffuser member 44 the three diffuser members define therebetween discharge air passages 46 and 48 the three diffuser members are connected together to form a subassembly as shown in fig1 the diffuser section includes a control section 49 in which the control elements regulating the operation of the air conditioning terminal are disposed such control elements may comprise a filter 61 thermostats 53 and volume control devices 55 as noted hereinbefore terminals.