Inches of Water
- inch water column (inch WC)
- in H2O
- Inches of water is mainly used in North America, for measuring small pressure differences. The low relative size of the units lend it to use in measuring the pressure of air supplied to a pipe organ and natural gas distribution.
1 inch of water is the pressure exerted by a 1 inch high column of water at a given temperature
- Residential gas equipment in the US is rated to a maximum of 14 inches of water
Use is mainly restricted to North America, for measuring small pressure differences. Used in weather forecasting and the aviation and refrigeration industries