Providing on-line non-downloadable computer software for aiding in the design and selection of energy efficient environmental wheels and units for directing and controlling the exchange of indoor and outdoor air for the purposes of reducing levels of indoor air pollutants, and structural and components parts thereof

Downloadable computer software for aiding in the design and selection of energy efficient environmental wheels and units for directing and controlling the exchange of indoor and outdoor air for the purposes of reducing levels of indoor air pollutants, and structural and components parts thereof