Abstract: The method may be a process of increasing the size and placement of return air ducts to increase the efficiency and airflow of a heating and cooling system. The process may take into consideration the current placement and sizes of return air in an existing building or may take into consideration the size of new construction for proper size and placement of return air ducts. The process allows for increased surface area which in turn allows for increased air intake and increased output.

Abstract: A trailer is disclosed. The trailer may be pulled behind a vehicle such as, but not limited to, a jeep, dune buggy, or ATV. Embodiments of the trailer may include a frame and an adjustable suspension. The adjustable suspension may be used to vary the height of the trailer in order to accommodate different types of terrain and loading. By changing the height, the clearance and/or approach angle of the trailer may be varied. Additional embodiments may include a tongue connected to the frame, which tongue may have an adjustable length and/or height. Where the trailer includes a cover and a tailgate, an optional locking system may be used. In one embodiment, the locking system includes a handle that may release both the tailgate and cover. In some embodiments, the handle may be partially pulled to release the cover while fully pulling the handle may release the tailgate.

Abstract: A trailer is disclosed. The trailer may be pulled behind a vehicle such as, but not limited to, a jeep, dune buggy, or ATV. Embodiments of the trailer may include a frame and an adjustable suspension. The adjustable suspension may be used to vary the height of the trailer in order to accommodate different types of terrain and loading. By changing the height, the clearance and/or approach angle of the trailer may be varied. Additional embodiments may include a tongue connected to the frame, which tongue may have an adjustable length and/or height. Where the trailer includes a cover and a tailgate, an optional locking system may be used. In one embodiment, the locking system includes a handle that may release both the tailgate and cover. In some embodiments, the handle may be partially pulled to release the cover while fully pulling the handle may release the tailgate.