A Helpful guide for beginners in Water Restoration.
Technicians and Office adminstrative teams
- RH – Relative Humidity — Relative Humidity refers to the measure of how close the water vapour in the atmosphere is to its saturation limit. Essentially, it tells us how much moisture the air can hold at a specific temperature. To put it simply, relative humidity doesn’t directly indicate the amount of water vapour unless the temperature is considered. For beginners in the industry, understanding relative humidity is crucial as it plays a significant role in various aspects of Emergency Water Restoration. By knowing the relative humidity, we can gain insights into correct drying procedures, the comfort level of human beings, and even drying times. Remember, the higher the relative humidity, the closer the air is to its saturation point. This means that the air holds a significant amount of water vapour, making it feel humid and possibly leading to condensation and re-wetting. On the other hand, lower relative humidity indicates that the air has less water vapour, resulting in drier conditions. This could lead to a higher risk of dehydration, increased evaporation, and potential challenges for occupants and working conditions. So, as a beginner in the industry, it’s important to grasp the concept of relative humidity and consider it when analysing restoration projects, planning equipment installation, or even adjusting the environment for optimal comfort levels.
- Hydroscopic Materials — When it comes to building materials and microbial organisms, their response to relative humidity (RH) is more important than the absolute water vapour content. Surprisingly, even small amounts of water vapour at low temperatures can raise the RH levels to 50–70%. This sustained high RH, occurring between temperatures of approximately 4 and 40°C, can pose health risks and potentially damage the building structure before RH reaches 100% (also known as the dew point) and condensation starts to occur. Understanding the behavior of hydroscopic materials and the impact of RH on building fabric is crucial, especially for beginners in the industry. By grasping these concepts, you’ll be able to make informed decisions and navigate the challenges effectively.
- Absolute Water Vapour Content — Absolute water vapour content refers to the actual amount of moisture present in the air, measured in grams of water vapour per cubic meter of air. Unlike relative humidity, which is influenced by temperature, absolute humidity gives a straightforward measurement of moisture levels. This information is particularly useful for those new to the industry, as it helps beginners understand the basic concept of moisture in the air.
- Dew Point — The dew point is an important term in restoration that refers to the temperature at which the air becomes saturated and can no longer hold any more water vapour. Simply put, when the dew point is low, such as around 50 — 60°F/10 — 15°C, the air feels comfortable and pleasant. It indicates that the air is not excessively humid, making it easier for our bodies to cool through evaporation.