IAQ guidance from the US Environmental Protection Agency is available for homes, schools, and commercial buildings. The guidance is and has always been voluntary. EPA’s aim is to ensure that IAQ is an important consideration in building design, operation, construction, and maintenance. EPA recently completed a new suite of guidance materials which cover how to weatherize or remodel a building to save energy while maintaining IAQ. The latest addition to EPA’s guidance is entitled Energy Savings Plus Health: Indoor Air Quality Guidelines for Multifamily Building Upgrades. As building guidance, codes, and standards evolve, IAQ and health considerations must be included.