Retrotec USACE - Manual (Page 9)

Figures ix
Figure D27. Unprotected high-traffi c entrance in an administrative building.
Figure D28. Main entrance doors equipped with a vestibule.
Figure D29. Industrial building external doors with high traffic not equipped with a
vestibule.
Figure D30. Example large industrial facility doors protected by a vestibule.
Figure D31. Fan belt used to turn fan by electric motor operation.
Figure D32. Paint booth exhaust operating when no painting is occurring.
Figure D33. Supply air outlets in kitchen adjacent to cooking hood that deliver heated air
into space.
Figure D34. Welding area that uses local exhaust hoods for fume capture that has pedestal
and column-mounted fans for worker comfort that cause high air movement in
space.
Figure D35. Exhaust stacks on engine dynameters that exhaust hot gases to outside.
Figure D36. Dust collector for a welding operation.
Figure D37. Example of the centralized local exhaust system for 24 workstations (left) and
a schematic of the demand variable fl ow exhaust system having a fan equipped
with a VFD drive, pressure sensor, and duct system with fl exible exhaust arms
with motorized dampers (right).
Figure D38. Electric motor powering pump.
Figure D39. Close capture hoods: woodworking machines (left), vehicle exhausts (center),
and from machining enclosure (right).
Figure D40. Canopy hood over chemical equipment.
Figure D41. Vehicle maintenance facility with air supply grilles located close to the roof
along the short side of the bay and air exhaust inlet at the roof level in the
middle of the bay.
Figure D42. Unit heaters used for heating in high bay machining area. Most of heat from
heaters rises, adding to temperature stratifi cation.
Figure D43. Steam unit heater along side a gas-fi red radiant heater.
Figure D44. Hot water unit heater.
Figure D45. Unoccupied room that could have its temperature reduced in winter.
Figure D46. Hangar with high supply air discharge has signifi cant temperature stratifi ca-
tion.
Figure D47. Thermostat settings and room temperatures at 18.3 °C (65 °F) with the out-
side dew point temperature 19.4 °C (67 °F).
Figure D48. DOAS with a complementary heating and cooling system.
Figure D49. AHU is connected to the central plant with a two-pipe system mold problems on
(left) and around (right) air diffuser supplying cold air jets.
Figure D50. Fan coil units located in the attic with no humidity control (left), condensation
on fan coil cold surfaces (center, right).
Figure D51. Uninsulated heating duct.
Figure D52. Inoperable dampers.
Figure D53. Fan belts attached to pulley on fan.
Figure D54. Section of supple air duct in mechanical room that has come loose, creating a
large duct leak.
Figure D55. Backward inclined fan.
Figure D56. Shaft for damper shown in branch duct.
Figure D57. Extremely dirty fi lter from window air conditioner.
Figure D58. Repaired leaking pipe segment in underground distribution system.
Figure D59. Steam leak at pipe fi tting.
Figure D60. Steam trap downstream of heat exchanger that requires periodic checking for
proper operation.