HVAC symbols

[jakaodrz]

Does anybody knows where to download free HVAC symbols (in GIF, JPG or similar format). They must include symbols for heating and cooling coils, filters, etc.
I need them for doing a guide for training people in a maintenance department.
I've tried to find them on i-net but, everything i found did not satisfy my needs (only a couple of symbols, and a lot of written material, not a pictures).

greets,
Petrika

 

[walkes]

You can probably take the symbols shown at the back of the ASHRAE Fundamentals Handbook and create the jpg images. (Scan them)

 

[jakaodrz]

Sorry, do not have this book.
I meant something more like DL them (symbols), and add them to the document.