Duct installation terms

 

100 HVAC duct installation terms, categorized for clarity. These cover technical components, tools, materials, processes, and standards commonly used in ductwork installation.

---

🧰 General Terms (Basics)

1. HVAC – Heating, Ventilation, and Air Conditioning

2. Duct – Channel for air distribution

3. Airflow – Movement of air

4. Supply Air – Air delivered to space

5. Return Air – Air pulled back for reconditioning

6. Exhaust Air – Air removed from space

7. Fresh Air Intake – Outside air intake

8. Static Pressure – Resistance to airflow

9. Velocity Pressure – Kinetic energy of moving air

10. Total Pressure – Sum of static and velocity pressure

---

🛠️ Duct Types

11. Rectangular Duct

12. Round Duct

13. Spiral Duct

14. Flexible Duct (Flex Duct)

15. Pre-insulated Duct

16. Sheet Metal Duct

17. Fabric Duct

18. Phenolic Duct

19. Aluminum Duct

20. PVC Duct

---

🔩 Duct Components

21. Duct Elbow

22. Duct Tee

23. Duct Reducer

24. Duct Splitter

25. Duct Take-off

26. Duct Collar

27. Duct Transition

28. Duct Branch

29. Duct Cap

30. Duct Damper

---

🔧 Dampers

31. Volume Control Damper (VCD)

32. Fire Damper

33. Smoke Damper

34. Motorized Damper

35. Manual Damper

36. Combination Fire Smoke Damper

37. Backdraft Damper

38. Opposed Blade Damper

39. Parallel Blade Damper

40. Balancing Damper

---

🧱 Accessories & Devices

41. Diffuser

42. Grille

43. Register

44. Louvers

45. Air Terminal

46. Plenum Box

47. Access Door

48. Air Filter

49. Sound Attenuator

50. VAV Box (Variable Air Volume)

---

🧰 Materials & Insulation

51. Galvanized Iron (GI)

52. Aluminum Cladding

53. Rockwool

54. Glasswool

55. Armaflex

56. Foil-faced Insulation

57. Duct Wrap

58. Duct Liner

59. Acoustic Insulation

60. Thermal Insulation

---

🧰 Fasteners & Supports

61. Hanger Rod

62. Cleat

63. Duct Strap

64. Angle Iron Support

65. Threaded Rod

66. Trapeze Support

67. Anchor Bolt

68. Saddle Support

69. Cable Tie

70. Duct Clamp

---

⚙️ Installation Tools

71. Duct Lifter

72. Drill Machine

73. Sheet Metal Shear

74. Rivet Gun

75. Folding Tool

76. Crimping Tool

77. Duct Seamer

78. Snips

79. Tape Measure

80. Spirit Level

---

⚒️ Sealing & Joining

81. Mastic Sealant

82. Duct Tape (HVAC grade)

83. Gasket

84. Duct Flange

85. TDC/TDF Flange (Transverse Duct Connection)

86. Slip and Drive Connection

87. S Cleat

88. Drive Cleat

89. Sealant Gun

90. Lock Form

---

📐 Standards & Quality

91. SMACNA – Sheet Metal and Air Conditioning Contractors’ National Association

92. ASHRAE – American Society of Heating, Refrigerating and Air-Conditioning Engineers

93. Leakage Class

94. Duct Pressure Class

95. Duct Gauge

96. Velocity Limits

97. Clearance

98. Duct Testing

99. TAB – Testing, Adjusting, and Balancing

100. Commissioning

typical standard sizes and approximate weights (in kg) for common HVAC duct components. These values are based on galvanized sheet metal (GI), 24-gauge thickness, and standard duct dimensions used in medium-sized commercial applications. Actual weights can vary based on material, thickness, insulation, and custom fabrication.

---

📏 Standard Sizes & Approximate Weights of Duct Components

No.	Duct Component	Common Size (mm)	Approx. Weight (kg)
1	Duct Elbow	600×400 mm, 90° radius	5–8 kg
2	Duct Tee	600×400 mm with 300 mm branch	6–10 kg
3	Duct Reducer	600×400 to 400×300 mm	3–6 kg
4	Duct Splitter	600×400 mm split into 2×300×200 mm	4–7 kg
5	Duct Take-off	300 mm round on 600×400 mm duct	1.5–2.5 kg
6	Duct Collar	300 mm diameter	1–2 kg
7	Duct Transition	600×400 to 400×300 mm, straight	4–6 kg
8	Duct Branch	600×400 mm main with 300×200 mm branch	6–9 kg
9	Duct Cap	600×400 mm	2–4 kg
10	Duct Damper (VCD)	600×400 mm with blades	6–10 kg

---

⚙️ Assumptions:

• Material: Galvanized Iron (GI), 24-gauge (approx. 0.6 mm thick)

• Fabrication: Flanged, with cleats or TDC connections

• No insulation

• Weight includes minor reinforcements (e.g., blades for dampers, stiffeners)