HVAC, which stands for Heating, Ventilation and Air Conditioning, is essential to a comfortable and productive building environment. To design, install and maintain effective HVAC systems, it is important to understand the various measurements used in the industry. This article discusses the basics of HVAC measurements and their relevance to facilities management.
Temperature
Temperature is the most basic HVAC measurement and is crucial for facilities management. The temperature of a building environment should be maintained at a comfortable level appropriate to the season and purpose of the building; for example, a school or office requires a different temperature to a gym or swimming pool. Temperature is measured in degrees Celsius (°C) or degrees Fahrenheit (°F).
Humidity
Humidity is the amount of moisture in the air and is measured using relative humidity (RH). RH is expressed as a percentage of the amount of water vapour in the air compared to the maximum that air can hold at a given temperature. Generally, the acceptable range of RH in a building is between 40-60%. Too much humidity can lead to condensation, mould, and fungal growth, while too little can lead to dry air and an uncomfortable atmosphere.
Air Flow
The quantity of air that is moved by a system is an important consideration for HVAC. Air flow is measured in cubic feet per minute (CFM) or cubic metres per second (CMS). The amount of air flow needed depends on the size of the space and the type of system being used.
Pressure
Pressure is the measure of the force of air when it is moving through a system. It is measured in terms of pounds per square inch (PSI). Pressure is important for HVAC systems because it affects the efficiency with which air is moved through the system.
Conclusion
HVAC measurements are essential to ensure the effective design, installation, and maintenance of HVAC systems. As a facilities manager, it is important to be familiar with the various measurements and how they relate to the performance of the system. With the right knowledge, facilities managers can ensure that their buildings remain comfortable and productive.
