design for hvac

[kongbyron]

Please help me how to calculate heat load an d the correct externalstatic pressure .

[The Viking]

7.5kW sounds about right...

OK,
You might have guessed, we do need a bit more information...
What?
Where?
When?
How?
.
.
.

[Brian_UK]

Try the fan bible...

Woods Practical Guide to Fan Engineering

http://pdfheart.com/a/Flakt%20Woods%20Practical%20Guide%20to%20Fan%20Engineering