This manual takes contractors through the design stage to the completion of a successful residential heating and cooling system installation. The whole house concept of Manual RS includes special design elements that match the needs of today's homeowners. With Manual RS, contractors can easily select, size and arrange the correct heating or cooling system components. The manual covers residential zoning issues—multiple, single-zone, and central multi-zone systems—and includes advice on working with homeowners to adapt the heating or cooling system design to meet modern home design features.