2021 International Energy Conservation Code (IECC)

2021 International Energy Conservation Code (IECC)

The 2021 International Energy Conservation Code (IECC) is a model code created by the International Code Council (ICC). It sets minimum standards for energy efficiency in new homes and buildings, covering things like insulation, windows, lighting, water heating, and appliances. In 2021, there were some important changes, including focusing on cost savings, making it easier to check building work (like air barriers and insulation), and making the rules for homes and businesses more consistent. These changes aim to cut down on energy use and help protect the environment.

What it is:
This is a model code, not a law.
Local governments can choose to adopt and change it as they see fit.
It helps ensure buildings are designed and built in a way that uses energy wisely and saves resources.

Key Areas Covered:
Building Envelope: Minimum levels of insulation (R-values) and how well windows let in heat and light (U-factors, SHGC).

HVAC & Water Heating: Insulation for ducts and how efficient heating and cooling systems must be.

Lighting & Power: Rules for how efficient lighting fixtures and electrical systems should be.

The 2021 IECC helps improve energy efficiency in buildings by setting standards that lead to less overall energy use and lower costs over time.
It encourages better energy habits through updated rules for insulation, lighting, heating and cooling systems, and building design. This helps builders and homeowners create better-performing buildings that waste less energy.

In addition to saving money, the code also looks at how energy use affects the environment and natural resources.
By pushing for efficient technology and sustainable practices, the 2021 IECC helps reduce emissions, use resources more wisely, and build a cleaner, greener future.

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