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Residential Code - mwalliance.org

The Trusted Source on Energy Efficiency Key Changes in the 2018 IECC Residential code Window U-Factors- Window U-factors will see a modest improvement in the 2018 IECC. Below is a comparison table between the 2015 and 2018 IECC by climate zone. Lighting Equipment A proposal to increase the percentage of high efficacy lamps in permanently installed fixtures from 75% to 90% passed. This will remain a mandatory requirement in the code . Air Barrier & Insulation- Added language to the air barrier and insulation installation table will specify the following: Supply and return register boots mustbe sealed to the subfloor or drywall Recessed lighting must be sealed tothe finished surface Space behind electrical/phoneboxes need to be insulatedERV/HRV Fan Efficiency A minimum fan efficiency of cfm/watt has been added for HRV and ERVs.

Key Changes in the 2018 IECC . Residential Code . Window U-Factors- R402.1.2 . Window U-factors will see a modest improvement in the 2018 IECC. Below is a comparison table between the 2015 and 2018 IECC by climate zone. ... compliance with the building thermal requirements in the IECC.

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