PSYCHROMETRIC CHART (FOLDS IN 3) A pocket-size reference guide that architect, engineer or contractor might find useful. Includes a psychrometric chart, important formulae and some handy charts relative to air conditioning (Refrigerants, refrigerant pipe sizes, Water Pipe Size, Cooling Check Figures). Enclosed in flexible plastic, it is durable enough to be around for a long time. Approximately 4.25 X 8 folds to 2.5 X 4.25
A**N
small folded chart
i guess that is what you get for this price
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