1. What is Dew Point (T_d)?

Definition: The dew point is the temperature at which air becomes saturated with water vapor and dew begins to form.

Purpose: It's a key metric in meteorology, HVAC, and industrial processes to predict condensation and assess comfort levels.

2. How Does the Calculator Work?

The calculator uses the Magnus formula:

where: \(\alpha(T,RH) = \frac{a \times T}{b + T} + \ln(RH)\)

Where:

• \( T_d \) — Dew point temperature (°C)
• \( T \) — Air temperature (°C)
• \( RH \) — Relative humidity (%)
• \( a, b \) — Magnus coefficients (17.27 and 237.7 respectively)

Explanation: The formula approximates the relationship between temperature, humidity, and the condensation point.

3. Importance of Dew Point

Details: Knowing the dew point helps prevent condensation problems in buildings, predict fog formation, and determine comfort levels in HVAC systems.

4. Using the Calculator

Tips: Enter the air temperature in °C and relative humidity (0-100%). The calculator will determine the dew point temperature.

5. Frequently Asked Questions (FAQ)

Q1: What's a comfortable dew point for humans?
A: Generally, dew points below 16°C (60°F) are comfortable, while above 20°C (68°F) feel muggy.

Q2: Can dew point be higher than air temperature?
A: No, dew point cannot exceed the current air temperature (100% relative humidity).

Q3: How does dew point differ from humidity?
A: Relative humidity changes with temperature, while dew point is an absolute measure of moisture content.

Q4: Why is dew point important in construction?
A: It helps determine when condensation might occur on surfaces, which can lead to mold or material damage.

Q5: How accurate is this calculator?
A: The Magnus formula provides good estimates for temperatures between 0°C and 60°C with typical accuracy of ±0.4°C.