Installing ceramic or porcelain tile is both an art and a science. Tile installers must know the composition of the tiles as well as how to lay them in place attractively. Besides the normal costs of labor and materials, a tile project's costs vary by the type of sub-flooring to be used as a foundation for the tile.
Three things can cause an EMI problem: A signal source creates some kind of noise, there is a transmission path for the noise, and/or there is a receiver sensitive enough to be distorted by the noise, as shown in Figure 1.
Sources of indoor air pollution include: 1  combustion sources such as oil, gas, and wood; 2  tobacco; 3  building materials, including asbestos-containing insulation;4  furnishings, including flooring, wet or damp carpets, and cabinets or furniture made from certain processed wood products;hese indoor air pollution levels are of concern to regulatory agencies because most people spend most of their time indoors. Indoor air pollution can cause immediate health effects, including headaches, dizziness, fatigue, asthma, hypersensitivity to particular substances, and irritation of the ears, nose, and throat.