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UV Transmission Equation:
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The KG VA UV transmission equation calculates the percentage of ultraviolet (UV) radiation that passes through window glass based on the KG VA factor and window thickness. This helps in assessing UV protection levels for different window configurations.
The calculator uses the UV transmission equation:
Where:
Explanation: The equation calculates the percentage of UV radiation that will pass through a window based on its material properties (KG VA factor) and physical thickness.
Details: Calculating UV transmission through windows is important for determining UV protection levels in buildings, protecting interior furnishings from fading, and assessing potential health risks from UV exposure indoors.
Tips: Enter the KG VA factor (typically provided by glass manufacturers) and the window thickness in millimeters. Both values must be positive numbers.
Q1: What is a typical KG VA factor for window glass?
A: The KG VA factor varies by glass type, typically ranging from 0.1 to 0.5 for most window glass products.
Q2: How does window thickness affect UV transmission?
A: Thicker windows generally provide better UV protection as the UV transmission is directly proportional to thickness in this calculation.
Q3: Are there other factors that affect UV transmission?
A: Yes, glass composition, coatings, and interlayers can significantly affect UV transmission beyond what this simple equation calculates.
Q4: What is considered good UV protection for windows?
A: For good UV protection, look for UV transmission values below 25%. Excellent protection would be below 10%.
Q5: Does this calculation account for all UV wavelengths?
A: No, this is a simplified calculation. For precise measurements, spectral analysis of the specific glass product is recommended.