Natural Light Tubular skylights meet Energy Star Criteria throughout the United States.
U-Factor: The lower the value the rate of heat flow. Less heat flows so heating and cooling bills are reduced.
Solar Heat Gain Coefficient (SHGC): Measures ability to block heat caused by sunlight. The lower the SHGC the more it reduces air conditioning costs.
All thermal performance values are NFRC Certified and are listed in the NFRC Product Directory.