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  1. New Air Flow Forum
  2. Ajustable Air Extractors
  3. Metric air flow conversions
  4. Chinese Roof Jack/ Round Cone Roof Track
  5. Practical Design of Exhaust and Blower Systems
  6. Air Velocity
  7. Engineer's Cook Book
  8. ductwork sizing
  9. Question???
  10. air through elbows
  11. Pressure Test Setup questions
  12. Plenum Question
  13. Aspect Ratios and their Cost
  14. Relationship between static pressure & friction per 100'
  15. New Here - questions on getting started with an elbow
  16. CALCULATING CONES
  17. Orfice Plates
  18. concentric diffuser developement
  19. Taking Air Flow Readings Across A New Air Handler?
  20. stamping louvers
  21. Straight Offset vs. Mitered Offset
  22. Electrical Diagrams
  23. Dryer Vent inline clean out boxes- lint reduction
  24. plenum take off - is it recommended?
  25. Do I need a - Pair of Pants?
  26. turning vanes
  27. twist fitting
  28. how to make offset
  29. Duct Construction
  30. Question?air velocity on supply outlet registers (Grilles)
  31. Plenum and takeoffs
  32. Duct work templates .... where can I get them?
  33. Duct notching
  34. Return Air Noise
  35. Duct Board
  36. Re: need a custom transition for a wall hood
  37. have a sheetmetal job that everyone says is a hvac shop job
  38. High Efficient Furnaces
  39. acoustical insulation
  40. Completing a Rect to Round Transition
  41. curb adapters
  42. charity for a poor math student.
  43. non fiberglass duct insulations
  44. static pressure , water column
  45. Radius Elbows
  46. static pressure
  47. estamates
  48. return cans as plenums?
  49. Duct covering film
  50. Screws or no Screws ... That is the question!!
  51. Underground Duct Work (Dry-A-Tron System)
  52. 8' -10' Duct lengths
  53. Cleaning Lined Duct
  54. Playing with SMACNA standards
  55. cold air return???
  56. find a pipe offset degree &lenght to fit a determined le
  57. how do you install TDF DUCT
  58. Understanding Transitions
  59. AgIon anitmocrobial coating for metal duct
  60. Turning Vanes(When to Use)
  61. Auto body shop
  62. SQ. to ROUND
  63. Paint Booth?
  64. Question?
  65. Duct Taps?
  66. duct sealing
  67. Splitter dampers
  68. square to round
  69. Question!!??
  70. Exposed Spiral
  71. rectangle to oval
  72. Transitions
  73. Plain Old Flat Roof Flashing
  74. Has anyone had to use K-flex insulation?
  75. Blow pipe fitting question
  76. Figuring plane change degrees
  77. Reducing 90 help!
  78. Field offsets - back to back elbows
  79. Shop Tickets
  80. Duct Testing
  81. Round opposed blade dampers
  82. Fire damper question
  83. Tin sheet
  84. Pittsburgh Jamming
  85. metal gauge for ducts
  86. Turning Vanes, Elbow Radius
  87. sheet metal drain system under piping
  88. advantages for using snaplock instead of pittsburgh lock in duct fabrication.
  89. Damper Hardware
  90. Old Air Flow Book
  91. Tie rods (conduit emt)
  92. Good books on duct design?
  93. Got a little duct work done
  94. Joining segments of a 4 piece 45deg. elbow
  95. Throat length for rectangle 45deg elbows
  96. Volume Damper Question.
  97. Duct Microwave to Outside
  98. metal duct formulas
  99. Duct manufacture
  100. airflow and s cleats
  101. duct Installation books?
  102. Reducers
  103. Bath Exhaust Fan Duct
  104. field offsets
  105. Rigid Aluminum Clothes Dryer Duct
  106. BLACK DUCT (are they distrupting the sheet metal industry)
  107. Fan selection process????
  108. Duct bend Insulation template
  109. Insulating/Sealing duct
  110. Flex connectors
  111. Kitchen ductwork
  112. field transitions
  113. Help this Newbie in the Field Please
  114. Pittsburgh Lock tool?
  115. Cladding
  116. Flex Duct Tool
  117. Perforated sheet....