Abstract: A household wall non-toxic paint additive comprised of mixture of solvent-soluble compounds, which fine granulated from available mineral composition, with dipole properties, in which aromatic oils can be added to the paint additive is enclosed in this current application. This nontoxic paint additive makes for a type of special painting material, in the current application, is non-harmful for man.

Abstract: A louver blade is provided. The louver blade according to current application is asymmetric in side view. Side view of the louver blade has one sharp end. The other end of the louver blade is blunt. Center of the side view of the louver is thicker than the other part of the blade. Angle of the sharp end is in the range of 3 to 10 degree. Another embodiment of the current application is a louver blade tapered in one direction.