National Energy Code
The National Energy Code officially titled the International Energy Conservation Code (IECC) is a model code that will have far reaching impact as it is adopted by more cities, municipalities and states.
The Energy Efficiency Codes Coalition a group led by an alliance of policy makers, businesses and public interests groups states, “The recent improvements in the 2010 model code aim to improve energy efficiency in commercial buildings by 25% in comparison to the 2006 model code. The 2015 model code will reduce peak power energy demand, thereby reducing strain on the electric grid and increasing reliability; reduce the size and cost of heating and cooling equipment in commercial and residential buildings; improve indoor comfort; help stabilize local energy prices; and increase national energy security.” The council also states, “All states have committed to 90% compliance with the 2012 code by 2017.
In regard to skylights, the 2015 IECC model code contains the following requirements:
- Total area may not be more than 3% of the total roof area.
- Maximum Solar Heat Gain Coefficient (SHGC) is .4
- Maximum U Factor is 0.75