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This calculator is used for sizing pipe systems carrying natural gas of 0.60 specific gravity at approximately eight (8) inches water column pressu...

This durable two-sided plastic sizing wheel comes with a complete instruction manual for residential and commercial duct-sizing procedures. Designe...

Laser Dimension Master 130 is a one-person laser measuring tool for distances, areas and volumes. It is easier and faster to use than a tape measur...

The SMACNA Duct System Calculator has detailed instructions and calculations to enable HVAC system designers to design an average duct system witho...