Good link for some I think

[Peter_1]

http://www.peci.org/ftguide/ftg/

[2cool4u]

awesome link,thanks peter_1.

[Brian_UK]

Good link Peter, I used to be involved with commissioning of HVAC equipment from about 1972 until 1992 and it is still envolving I suspect.

The need to ensure energy efficient operation is feeding the beast now which has to be a good thing.