Abstract: A heat exchanger coil for a condenser unit which eliminate corner and concentric eddies for high energy efficiency includes a continuous curvature of an oval shape profile across a cross sectional view. The heat exchanger coil includes a circular section, a first planar section, a second planar section, and a coil opening as the first planar section and the second planar section are adjacently connected and tangentially positioned with the circular section. The configuration between the circular section, the first planar section, and the second planar section delineate the continuous curvature of an oval shape and the coil opening. The heat exchanger coil is internally placed within a cabinet assembly and connected with other associated components of an outdoor condensing unit or outdoor unit so that the heat exchanger coil is able to eliminate corner and concentric eddies that are generally present within rectangular and circular shaped heat exchangers.

Abstract: A containment unit for use with hazardous materials and in heating, ventilating, and air conditioning applications has a lateral wall, a first terminal end, and a second terminal end. The lateral wall includes a lateral inner wall, a lateral insulation layer, and a lateral outer wall that form a main body and an access panel; the first terminal end and the second terminal end being adjacently connected to the main body and the access panel being removably attached to the main body. Similar to the lateral wall, the first terminal end includes a first end inner wall, a first end insulation layer, and a first end outer wall, while the second terminal end includes a second end inner wall, a second end insulation layer, and a second end outer wall. The lateral inner wall, the first end inner wall, and the second end inner wall are impermeable and corrosion resistant.

Abstract: An air handling unit with a cross-sectional profile of continuous curvature eliminates corner singularities and eddies for high energy efficiency in comparison to rectangular air handling units. A housing has an outer shell, an inner shell, and an insulation shell between the outer and inner shells. A blower and motor assembly forces air through an air intake opening over a heat exchanger, and out through an air discharge opening. An upper door and a lower door in the wall of the housing allow maintenance access to the blower and motor assembly and the heat exchanger. Three heat exchanger coil arrangements are also disclosed: an A-coil arrangement, a parallel coil arrangement, and a circular coil arrangement.