Diffuser cad block free plugin + Calculator
HVAC drafters know that creating ducting shop drawing will always involves diffuser cad block at the end of the line. Drawing diffuser cad block manually is often the most time-consuming part of the process, as the sizes and types must be adjusted to meet specific project requirements.
Driven by this common challenge, the engpocket team and I asked ourselves: “What is the simplest and fastest way to generate diffusers cad block in AutoCAD?”
Finally, we developed a custom AutoCAD diffuser dwg Plugin that you can download for free. Just give it a try and see how the magic works.
Make sure to watch the full video tutorial on our youtube channel. Please also like & subscribe.
What is a diffuser in HVAC system?
A Diffuser is a device designed to distribute airflow, usually installed at the end of the ductwork. Its primary functions are to reduce air velocity and mixing air in the room. The diffuser blades are angled to optimize air distribution patterns. It is often used for supply air applications rather than return air applications.
Classification by shape (concentric blade design): Based on the concentric blade configuration, diffusers are categorized into 2 types:
1. Square Diffuser (can be square or rectangular).
2. Round Diffuser (circular).
Note: There is also the linear slot diffuser, but it features a parallel blade design and rectangular shape.
Classification by airflow distibution direction (throw pattern): In terms of airflow direction & distribution patterns, diffusers are classified into 4 types:
1. 4 Way Diffuser
2. 3 Way Diffuser
3. 2 Way Diffuser
4. 1 Way Diffuser
HVAC Diffuser Calculator
Diffuser Sizing Calculator
Diffuser cheat sheet HVAC
Square Diffuser Sizing Chart
Reference based on Neck Velocity (2.5 – 4.0 m/s)
| Neck Size (mm) | Size (Inch) | Range (CFM) | Range (CMH) |
|---|---|---|---|
| 150 x 150 | 6″ x 6″ | 60 – 160 | 100 – 270 |
| 200 x 200 | 8″ x 8″ | 150 – 290 | 250 – 500 |
| 250 x 250 | 10″ x 10″ | 250 – 470 | 420 – 800 |
| 300 x 300 | 12″ x 12″ | 350 – 650 | 600 – 1100 |
| 350 x 350 | 14″ x 14″ | 500 – 900 | 850 – 1500 |
| 400 x 400 | 16″ x 16″ | 700 – 1200 | 1200 – 2000 |
| 450 x 450 | 18″ x 18″ | 900 – 1500 | 1500 – 2500 |
| 500 x 500 | 20″ x 20″ | 1100 – 1900 | 1900 – 3200 |
| 600 x 600 | 24″ x 24″ | 1600 – 2800 | 2700 – 4800 |
Friend, we also provide free download plugins for duct cad block and duct fittings cad block like elbow, tee, reducer in this link. Feel free to try them and leave your comments. Do not forget to watch the tutorial video on our youtube channel.
See you soon on another free plugin post.