Tubular Skylight Energy Performance Ratings:
U-Factor measures the rate of heat transfer and tells you how well the skylight insulates. U-factor values generally range from 0.20 to 1.25 and are measured in Btu/h ft2 °F. The lower the U-factor, the better the skylight insulates.
Solar Heat Gain Coefficient (SHGC) measures the fraction of solar energy transmitted and tells you how well the product blocks heat caused by sunlight. SHGC is measured on a scale of 0 to 1; values typically range from 0.20 to 0.80. The lower the SHGC, the less solar heat the skylight transmits. The Solar Heat Gain for Natural Light is 0.23.
Claiming Your Federal Tax Credit
To assist with claiming a tax credit, Natural Light has provided a Statement of Certification for homeowners. Please download and complete the form and keep it with your tax records. The Statement of Certification is not required to be filed with your forms, but income tax regulations require taxpayers to have appropriate documentation to qualify for a tax credit.
Statement of Certification