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We offer some useful downloads (All free and with my good wishes)!
NEWLY AVAILABLE 
Extremely interesting! But too late for inclusion in the Second Edition of "Collection of Magazine Articles". Geoff's investigation into severe and unusual damage caused to an evaporator by severe icing!              Download
 
HEAT PUMPS 
If you have read "Our Industry" in the RACA Magazine for March 2007, you may be visiting because of Geoff's offer to place a PowerPoint on this site, providing additional information. If you would like it, here it is! Download
Download charts and diagrams
In our effort to assist folks in their learning efforts, we offer certain charts and diagrams for downloading. You may wish to print these, in order to perform exercises as you learn. The pressure-enthalpy diagrams offered here have been simplified by the omission of certain advanced information which, we think, would serve only to muddy the water for a person unfamiliar with the diagram.

DUCT DESIGN CHARTS
Duct friction chart
Rectangular equivalents of circular ducts

PRESSURE-ENTHALPY    DIAGRAMS
Refrigerant R-22
Refrigerant R-134a
Refrigerant R-407C

PSYCHROMETRIC CHARTS

Trane Sea Level              Carrier Sea Level           Carrier 750 m altitude     Carrier 1500 m altitude

 

     EXPLODED COMPRESSOR