There are three main types of ducting used within domestic ventilation systems: rigid ducting, semi-rigid ducting and flexible ducting.

There are three main types of ducting used within domestic ventilation systems: rigid ducting, semi-rigid ducting and flexible ducting.

1. HVAC
DUCT TYPES

2. TOUR IN 3D MODEL-VIDEO
TYPES OF DUCT

3. TYPES OF DUCTS
SHAPE PRESSURE VELOCITY
Rectangle Spiral
Square Oval
High Pressure
Duct
Medium Pressure
Duct
Low Pressure
Duct
High Velocity
Duct
Low Velocity
Duct
Medium Velocity
Duct

4. TYPES OF DUCTS
SHAPE PRESSURE VELOCITY
Rectangle Spiral
Square Oval
High Pressure
Duct
Medium Pressure
Duct
Low Pressure
Duct
High Velocity
Duct
Low Velocity
Duct
Medium Velocity
Duct
Let’s Learn!

5. HVACDUCT TYPES
(SHAPE)
Rectangle
Spiral
Oval
Square

6. 01. RECTANGULAR DUCT

7. RECTANGULAR DUCT
If Space is limited
Connections are not seamless,
improper connection can result
in leakages/loss of energy
Comparative more air flow
required
Low pressure system
More noise w.r.t Spiral/Oval duct
Easy to bend, join
BUILDINGSINDUSTRIESRESIDENTIALPLANTS
More weight w.r.t Spiral/Oval
duct, more support
More friction loss

8. 02. SPIRAL DUCT

9. SPIRAL DUCT
Ceiling is Not there
Little more costly w.r.t
Rectangular duct
Less material used
Less support for less material
as well as less weight
Looks nice, even it is visible,
only black clothes need to
wrap after insulation
Light weight
KITCHENOFFICEFACTORIESOFFSHORE

10. SPIRAL vs RECTANGULAR DUCT
Perimeter = 2 x (1 + 0.5) m
Width (W) = 1000 mm
Height (H) = 500 mm
Area = 1000 mm x 500 mm
= 1 m x 0.5 m
= 0.5 sq.m
= 2 x (1.5) m
= 3 m
Area = 0.5 sq.m
= 0.5 sq.m
r= 0.4 m
= 2 x 3.14 x 0.4
Perimeter =
= 2.51 m
W
H
r

11. Perimeter = 3.0 m Perimeter = 2.51 m
W
H
r
>
Less Surface area
Less turbulence
Less pressure drop
More efficient
SPIRAL vs RECTANGULAR DUCT

12. Diameter,
D = 2r = 2 x 0.4 m = 0.8 m
W
H
r
Space Limitations
Height,
H = 0.5 m
D
SPIRAL vs RECTANGULAR DUCT

13. 03. OVAL DUCT

14. OVAL DUCT
High efficiency
Low friction loss
Low noise
Seamless design
Smooth air flow
Low maintenance cost
ENERGY EFFICIENT BUILDINGSHOTELS/EXHIBITIONS
Better than rectangle/spiral
duct
Low leakage

15. 04. SQUARE DUCT

16. OTHER DUCT
ACCESSORIES

17. 90 DEGREE BEND DUCT
(SPIRAL)

18. 90 DEGREE BEND DUCT
(RECTANGULAR)

19. REDUCER/EXPANDER
(SPIRAL)

20. REDUCER/EXPANDER
(RECTANGULAR)

21. 45 DEGREE BEND DUCT
(RECTANGULAR)

22. 45 DEGREE BEND DUCT
(SPIRAL)

23. RECTANGLE &
SPIRAL DUCT

24. FLEXIBLE DUCT

25. FLEXIBLE
DUCT

26. SPECIAL DUCT

27. OTHER TYPES OF DUCTS
RIGID FLEXIBLE HAZARDOUS
PREINSULATED PVC FIRE-RATED