PLEASE first send me a message.
The most important things in HVAC is the correct calculation of cooling and heating load and choose the best size for devices about ventilation, air condition system and ... . so I will suggest Mechanical floor plans showing general equipment layout and single line duct size and layouts, piping sizes and layouts, terminal units, diffusers, grilles, registers, thermostats, humidistats and any other pertinent devices or equipment.