SketchUp Plugin for HVAC Design

Hello my friends,

I’m looking for the best extension or plugin for HVAC systems. I need it for design and calculate the systems by interior preasure, speed and other coefficients.
Thnx a lot!

best regards,

Hello Alexei,

These may be of interest:

3skeng - 3D — Engineering software for SketchUp

SketchUp Engineering Toolbox — Add standard and customized parametric components