Energy codes are designed to improve building efficiency, reduce energy consumption, and lower environmental impact. They set requirements for insulation, heating and cooling systems, lighting, and other elements that impact a building’s energy use.
U-factor measures how well a window insulates. A lower U-factor indicates better insulation, meaning less heat is lost through the window. It’s an essential metric for energy efficiency in building design.
A blower door test measures the air tightness of a building’s envelope. This test helps identify leaks that can impact energy efficiency, as air leakage increases heating and cooling costs.
The IECC specifies minimum R-values for insulation in residential buildings based on climate zones to achieve energy efficiency. R-13 is a common minimum for exterior walls in milder climate zones, though it may be higher in colder regions.
LEDs are recommended for their high energy efficiency and long lifespan. They use significantly less energy than incandescent and halogen bulbs, making them the preferred choice for energy-efficient lighting in commercial buildings.
