CDI, also known as Comfort Design, is a full-service manufacturer of windows for commercial and residential customers. The company has been providing a variety of replacement window products and related solutions since 1992. It offers a range of products, such as frames and doors for interior and exterior applications. Comfort Design provides a selection of windows in a variety of styles, such as awnings, casements, sliders, double sliders, single-hung, tilt and picture. The company specializes in offering product selection, customized design and development, order placement and customer support services. It also provides finishing and technical assistance services. Comfort Design additionally offers architectural and lifetime warranty services.