Here's some great new items just added to the Educational Forums:

Six Handy HVAC Calculators:
http://hvac-talk.com/vbb/showthread.php?t=502962

NICOR - Natural Gas Reference Guide:
http://hvac-talk.com/vbb/showthread.php?t=503022

Natural Gas Pipe Sizing:
http://hvac-talk.com/vbb/showthread.php?t=503032

McQuay:
http://hvac-talk.com/vbb/showthread.php?t=503042

Danfoss Turbocor Compressor (Video):
http://hvac-talk.com/vbb/showthread.php?t=503062

Copeland PerformanceAlert (Video):
http://hvac-talk.com/vbb/showthread.php?t=503072

Robertshaw Basic Heat Gas Valves:
http://hvac-talk.com/vbb/showthread.php?t=503092

Blower & Motor Calculations:
http://hvac-talk.com/vbb/showthread.php?t=503112

Belt Energy Efficiency (Video):
http://hvac-talk.com/vbb/showthread.php?t=503132

Belt Efficiency Calculator:
http://hvac-talk.com/vbb/showthread.php?t=503142

Psychrometric Chart Tutorial:
http://hvac-talk.com/vbb/showthread.php?t=503152

Psychrometric Chart Lesson:
http://hvac-talk.com/vbb/showthread.php?t=503162

Sheet Metal Fitting Fabrication (Video):
http://hvac-talk.com/vbb/showthread.php?t=503172

Rotary Compressors Explained (Flash Video):
http://hvac-talk.com/vbb/showthread.php?t=503192

Vilter Single Screw Compressor (Video):
http://hvac-talk.com/vbb/showthread.php?t=503202

Copeland Digital Discus Compressor (Video):
http://hvac-talk.com/vbb/showthread.php?t=503212

Emerson/RDT Eco-Cool Refrigeration Rack (Video):
http://hvac-talk.com/vbb/showthread.php?t=503252

RDT Refrigeration Systems:
http://hvac-talk.com/vbb/showthread.php?t=503262

Free Online CO2 E-Learning Course:
http://hvac-talk.com/vbb/showthread.php?t=503272

Kelvinator/Universal Nolin:
http://hvac-talk.com/vbb/showthread.php?t=503302