Use natural and unadulterated building materials.
 

Using wall, ceiling and floor materials that allow air diffusion and are "hygroscopic," meaning that they naturally regulate indoor humidity.
 

Filter and neutralize air pollutants.
 

Use radiant heat (as opposed to forced air) and as much passive solar heat (windows that allow sunlight to shine into home during cold winter months) as possible for the heating system.
 

The total moisture content of a new building shall be low and dry out quickly.
 

A building shall have a neutral smell.
 

Eliminate or reduce man-made electromagnetic radiation (EMR) as much as possible.
 

The production, installation, and disposal of building materials shall not contribute to environmental pollution and high energy costs.