The design of your air ducts, and the pressure of air flow over time may result in some variation in efficiency. At J. D. Swallow we are experts and checking and adjusting the ductwork to ensure that it is balanced to provide comfortable air flow at the right temperature throughout the year. When it comes to duct work, each elbow, division or change in air volume capacity can create resistance to air flow. Likewise, each change in any part of the system effects all the other parts of the system. We can analyze the air flow to ensure that the ductwork design to provide the right pressure to reach each room.