Manual T Air Distribution

Even the most astute designer often overlooks the Manual T process, which designs the proper sizing and placement of supply air diffusers, grilles and return grills. Without this critical design step,  a perfect load calculation and duct design can provide adequate conditioned air but rooms can still feel uncomfortable. Improperly placed and sized diffusers, grilles and registers can lead to occupants feeling drafts from the moving air or discomfort due to improper mixing. Improper sizing and placement of these elements can also result in excessive noise.