Engineering ToolBox - Resources, Tools and Basic Information for Engineering and Design of Technical Applications!

This is an AMP page - Open full page! for all features.

• the most efficient way to navigate the Engineering ToolBox!

# Required Air Flow to Remove Moisture

The required air flow to remove moisture or water vapor production in a room can be calculated as

L = G / (xr - xm)                                    (1)

where

L = required air flow (kg/h)

G = moisture or vapor production in the room (kg/h)

xr = humidity ratio in room air (kgH2O/kg dry air)

xm = humidity ratio in make-up air (kgH2O/kg dry air)

### Example - Removing Moisture from a Room

Required air flow to keep a humidity ratio of 0.010 (kgH2O/kg dry air) in a room with input air humidity ratio of 0.001 (kgH2O/kg dry air) and vapor production 100 (kg/h) can be calculated as

L = (100 kg/h) / ((0.010 kgH2O/kg dry air) - (0.001 kgH2O/kg dry air))

= 11020 (kg/h)

## Related Topics

### • Ventilation Systems

Design of systems for ventilation and air handling - air change rates, ducts and pressure drops, charts and diagrams and more.

## Related Documents

### Air - Humidity Ratio

The mass of water vapor present in moist air - to the mass of dry air.

### Air - Maximum Moisture Carrying Capacity

Maximum water content in humid air vs. temperature.

### Evaporation from a Water Surface

Evaporation of water from a water surface - like a swimming pool or an open tank - depends on water temperature, air temperature, air humidity and air velocity above the water surface - online calculator.

## Search Engineering ToolBox

• the most efficient way to navigate the Engineering ToolBox!

## SketchUp Extension - Online 3D modeling!

Add standard and customized parametric components - like flange beams, lumbers, piping, stairs and more - to your Sketchup model with the Engineering ToolBox - SketchUp Extension - enabled for use with the amazing, fun and free SketchUp Make and SketchUp Pro . Add the Engineering ToolBox extension to your SketchUp from the Sketchup Extension Warehouse!