Please explain to us in more details about your project. Things that will definitely help us serving you better are information related to your building envelope Thermal Properties. Also solar orientation of the building is crucial for determining the cooling load, passive heating potential, optimal location of Solar Panels. Building Architectural Plans as well as existing or non existing HVAC plans will help us integrate any retrofit design with existing services or the already planned HVAC services. When Plans are not available, a hand written sketch with Building's dimensions, Windows Wall Ratios (or simply windows dimensions), an arrow that points to the North etc...
