# US 11,441,797 B1 · Systems and methods for commercial airstream pretreatment > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 11,441,797 B1 - Document ID: US11441797B1 - Status: Granted - Kind: B1 - Application number: 16/560,904 - Filed: 2019-09-04 - Granted: 2022-09-13 - Earliest claimed: 2019-09-04 - Assignees: Altaire Systems LLC - Applicants: Altaire Systems LLC - Inventors: James Robert Meacham; James Ryan Johnston - Web page: https://patentgrep.com/patent/US11441797B1 ## CPC - F24F 3/044: Systems in which all treatment is given in the central station, i.e. all-air systems - F24F 5/0007: {cooling apparatus specially adapted for use in air-conditioning (F24F5/0046 takes precedence)} - F24F 3/1405: {in which the humidity of the air is exclusively affected by contact with the evaporator of a closed-circuit cooling system or heat pump circuit} - F24F 3/153: with subsequent heating, i.e. with the air, given the required humidity in the central station, passing a heating element to achieve the required temperature - F24F 11/64: using pre-stored data - F24F 11/76: by means responsive to temperature, e.g. bimetal springs - F24F 11/84: using valves - F24F 11/77: by controlling the speed of ventilators - F24F 11/89: Arrangement or mounting of control or safety devices - F24F 2110/12: of the outside air - F24F 2110/20: Humidity - 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 Embodiments of the current disclosure include air pretreatment devices suitable for pretreatment of air received by air handler units. The air pretreatment devices can include an air intake configured to capture the outside air. A cooling coil system can process changes in the dry bulb and dew point temperatures of the captured outside air. The pretreated air can then be passed via an air outtake to the air handler. The cooling coil system can be coupled to at least a chilled water intake and a chilled water return line. Finally, a single water valve control unit located on either the chilled water intake or chilled water return line can be adjusted to direct a change in the dry bulb temperature and dew point temperature within the cooling coil system. ## Claims ### Claim 1 A pretreatment device for installation on an air handler comprising: an air intake configured to capture outside air wherein the outside air comprises a dry bulb temperature and a dew point temperature; a two-coil system comprising: a cooling coil system to process a change in the dry bulb temperature and dew point temperature of the captured outside air; and a reheat coil system to process a change in the dry bulb temperature of the captured outside air; an air outlet configured to direct the processed air into the air handler for further processing prior to discharge; and a single water supply system comprising: a chilled water intake line coupled to the cooling coil system; a chilled water return line coupled to the reheat coil system; a single chilled water valve placed on the chilled water return line; and a chilled water valve controller configured to issue one or more commands to the single chilled water valve wherein the issued commands are configured to direct the changes in the dry bulb temperature and dew point temperature within the cooling coil system. ### Claim 2 (depends on 1) The pretreatment device of claim 1, wherein the chilled water intake and chilled water return line are installed onto existing chilled water intake and water return lines utilized by the air handler. ### Claim 3 (depends on 1) The pretreatment device of claim 1, wherein the pretreatment device can be separated into two pieces. ### Claim 4 (depends on 3) The pretreatment device of claim 3, wherein each of the two separate pieces comprise dimensions suitable for fitting through a standard doorframe. ### Claim 5 (depends on 4) The pretreatment device of claim 4, wherein a first piece comprises the cooling coil system and a second piece comprises a filtration portion of the pretreatment device. ### Claim 6 (depends on 1) The pretreatment device of claim 1, wherein the cooling coil system comprises a first section configured to cool and dehumidify outside air, and a second section configured to desaturate and reheat air received from the first section. ### Claim 7 (depends on 6) The pretreatment device of claim 6, wherein a physical gap exists between the first and second sections of the cooling coil system such that moisture retrieved from the outside air from the first section is not transferred to the second section via the physical gap. ### Claim 8 (depends on 1) The pretreatment device of claim 1, wherein the air intake includes at least one attachment point wherein one or more supplemental function modules to the pretreatment device can be installed to the at least one attachment point. ### Claim 9 (depends on 8) The pretreatment device of claim 8, wherein the one or more supplemental function modules comprises a heating element to heat the outside air prior to processing. ### Claim 10 (depends on 1) The pretreatment device of claim 1, wherein the air handler pretreatment device is configured for installation onto an air handler associated with an HVAC system installed in a multi-tenant residential building, commercial building, or industrial building. ### Claim 11 (depends on 1) The pretreatment device of claim 1, further comprising a controller to operate the pretreatment system by adjusting the single water valve control based on at least return air sensor data received from a sensor configured to sense the dry bulb and dew point conditions of return air utilized by the air handler. ### Claim 12 (depends on 11) The pretreatment device of claim 11, wherein the controller further operates the single water valve control based on data received from the air handler. ### Claim 13 (depends on 11) The pretreatment device of claim 11, wherein, in response to a request by a user, the controller generates a user interface via a network connection. ### Claim 14 (depends on 11) The pretreatment device of claim 11, wherein the controller can further operate the commercial-grade air handler via at least one data connection between the pretreatment device and the commercial-grade air-handler. ### Claim 15 (depends on 11) The pretreatment device of claim 11, wherein the controller further operates the single chilled water valve based on historical trend data. ### Claim 16 (depends on 1) The pretreatment device of claim 1, wherein the air intake is configured to only accept fresh air for pretreatment processing. ### Claim 17 (depends on 1) The pretreatment device of claim 1, wherein the single chilled water valve is configured to control water flow both the cooling coil system and the reheat coil system.