I have asked two times the following question:I want to calculate the gas concentration, in ppm, in the closed chamber of volume 1025 cm3. I have a cylinder of mixture of NH3 and air with the 10...

Comprehensive, user-friendly humidity calculator supporting all popular parameters including dew/frost-point, %rh, ppmV, moisture content and more.

A calculator that can calculate the relative humidity based on temperature and water content

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{using Search tool for exploring some advanced niche research work being done on a variety of subjects.}

Fans are rated by how many cubic feet per minute the fan is capable of cycling. You can determine the number of air changes per hour if you know the capacity of the fan, convert that figure to cubic feet per hour, and compare that to the volume of the room.

Maximum water content in humid air depends on temperature

The carbon dioxide concentration in a room can indicate air quality and ventilation system efficiency

1910.1000 - Air contaminants

Occupational Safety and Health Administration methods to measure Chlorine Dioxide concentrations using various sampling methods

"If a gaseous emission sample is analyzed and found to contain water vapor and a pollutant concentration of say 40 ppmv, then 40 ppmv should be designated as the "wet basis" pollutant concentration. "