# US 11,898,772 B2 · Base system for air handler > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 11,898,772 B2 - Document ID: US11898772B2 - Status: Granted - Kind: B2 - Application number: 18/120,917 - Filed: 2023-03-13 - Published: 2023-07-13 - Granted: 2024-02-13 - Earliest claimed: 2020-01-31 - Assignees: Air Distribution Technologies IP, LLC - Applicants: Air Distribution Technologies IP, LLC - Inventors: Scott A Griesinger; Paul D. Studer - Web page: https://patentgrep.com/patent/US11898772B2 ## CPC - F24F 13/32: Supports for air-conditioning, air-humidification or ventilation units - F24F 13/20: Casings or covers - F24F 2221/16: mounted on the roof - F24F: AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING (removing dirt or fumes from areas where they are produced B08B15/00; vertical ducts for carrying away waste gases from buildings E04F17/02; tops for chimneys or ventilating shafts, terminals for flues F23L17/02) ## Abstract A base system for a heating, ventilation, and air conditioning (HVAC) system includes a frame configured to support a housing of the HVAC system, where the frame includes a base rail configured to define a portion of a perimeter of the frame. The base rail includes a base segment configured to be disposed on a curb in an installed configuration of the HVAC system, an external wall extending from the base segment, a top segment extending from the external wall, an internal wall extending from the top segment, and a recessed flange extending from the internal wall and away from the external wall. ## Claims ### Claim 1 A base system for a heating, ventilation, and air conditioning (HVAC) system, comprising: a frame configured to support a housing of the HVAC system; and a base rail of the frame configured to extend along a perimeter of the frame, wherein the base rail comprises: a base segment configured to be supported by a curb in an installed configuration of the HVAC system; an external wall extending from the base segment and configured to be exposed to an environment surrounding the HVAC system; a top segment extending from the external wall and configured to support a wall panel of the HVAC system; and a recessed flange extending away from the external wall between the base segment and the top segment relative to a height of the base rail. ### Claim 2 (depends on 1) The base system of claim 1, wherein the base rail comprises an internal wall extending from the top segment to the recessed flange. ### Claim 3 (depends on 2) The base system of claim 2, comprising: a floor panel secured to the recessed flange; and a gasket disposed between the floor panel and the base rail. ### Claim 4 (depends on 3) The base system of claim 3, wherein: the gasket extends between the floor panel and the recessed flange, the gasket extends between the floor panel and the internal wall, or both. ### Claim 5 (depends on 3) The base system of claim 3, wherein the floor panel comprises a base and a lip extending from the base, wherein the base extends along and is secured to the recessed flange, and the lip extends along the internal wall. ### Claim 6 (depends on 1) The base system of claim 1, comprising a floor panel secured to the recessed flange. ### Claim 7 (depends on 6) The base system of claim 6, wherein the floor panel is secured to the recessed flange via an adhesive. ### Claim 8 (depends on 6) The base system of claim 6, comprising an additional base rail of the frame, wherein the additional base rail is disposed opposite the base rail relative to the floor panel, and wherein the floor panel is secured to an additional recessed flange of the additional base rail. ### Claim 9 (depends on 8) The base system of claim 8, wherein the floor panel is captured between the base rail and the additional base rail and is disposed internal to the base rail and the additional base rail. ### Claim 10 (depends on 8) The base system of claim 8, comprising an interior cross rail coupled to and extending between the base rail and the additional base rail, wherein the floor panel is positioned on a surface of the interior cross rail. ### Claim 11 (depends on 1) The base system of claim 1, wherein the external wall extends along the height of the base rail, the base segment extends transverse to the height, the top segment extends transverse to the height, and the recessed flange extends transverse to the height. ### Claim 12 An enclosure for a heating, ventilation, and air conditioning (HVAC) system, comprising: a frame comprising a base rail, wherein the base rail comprises: a base segment configured to be disposed on a curb in an installed configuration of the enclosure; an external wall configured to define an exterior of the enclosure; a top segment configured to support a wall panel of the enclosure; and a recessed flange disposed between the base segment and the top segment relative to a height of the base rail; and a floor panel comprising a base secured to the recessed flange of the base rail, wherein the base is disposed at least partially below the top segment relative to a direction of gravity. ### Claim 13 (depends on 12) The enclosure of claim 12, wherein the base rail comprises an internal wall extending from the top segment to the recessed flange, the floor panel comprises a lip extending from the base, and the base extends along the internal wall. ### Claim 14 (depends on 13) The enclosure of claim 13, comprising a gasket disposed between the floor panel and the base rail. ### Claim 15 (depends on 14) The enclosure of claim 14, wherein the gasket extends between the recessed flange and the base, the gasket extends between the internal wall and the lip, or both. ### Claim 16 (depends on 12) The enclosure of claim 12, wherein the floor panel is secured to the recessed flange via an adhesive. ### Claim 17 A base system for a heating, ventilation, and air conditioning (HVAC) system, comprising: a base rail of a frame configured to support a housing of the HVAC system, wherein the base rail is configured to define a portion of a perimeter of the frame, the base rail is a single piece, and the base rail comprises: a base segment configured to be supported by a curb in an installed configuration of the HVAC system; an external wall extending from the base segment and along a height of the base rail; a top segment extending from the external wall and configured to support a wall panel of the HVAC system; and a recessed flange disposed between the base segment and the top segment relative to the height of the base rail, wherein the recessed flange is configured to support a floor panel of the base system. ### Claim 18 (depends on 17) The base system of claim 17, wherein the base rail comprises an internal wall extending along the height of the base rail and between the top segment and the recessed flange. ### Claim 19 (depends on 17) The base system of claim 17, wherein the base segment, the top segment, and the recessed flange extend crosswise to the height of the base rail. ### Claim 20 (depends on 17) The base system of claim 17, wherein the external wall comprises a punched hole configured to receive a lifting device.