Consider this!

Universal Design according to the Centre of Universal Design, is “the design of products and environments to be usable by all people, to the greatest extent possible, without the need for adaptation or specialised design”.  In other words it is an approach to design that takes into consideration the variety of abilities and disabilities of everyone.
Studies have shown that on average, the air quality inside a house is worse than outside.  Why?  A high percentage of furniture is made with materials known to cause respiratory illness and other serious diseases.  Do you or any members of your family spend a lot of time indoors?