# US 11,306,932 B2 · Fresh air building and home ventilation apparatus and methodologies > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 11,306,932 B2 - Document ID: US11306932B2 - Status: Granted - Kind: B2 - Application number: 16/071,066 - Filed: 2017-01-18 - Published: 2021-06-10 - Granted: 2022-04-19 - Earliest claimed: 2016-01-18 - Assignees: Ventamatic, Ltd. - Applicants: Ventamatic, Ltd. - Inventors: John S. Saunders; Thomas L. Murrell; Aaron E. Gary; Randall W. Clark; James V. Kokal - Web page: https://patentgrep.com/patent/US11306932B2 ## CPC - F24F 11/30: for purposes related to the operation of the system, e.g. for safety or monitoring - F24F 11/0001: {for ventilation (F24F11/30 takes precedence)} - F24F 11/46: Improving electric energy efficiency or saving - F24F 11/58: using Internet communication - F24F 11/61: using timers - F24F 11/64: using pre-stored data - F24F 11/65: for selecting an operating mode - F24F 11/74: for controlling air flow rate or air velocity - F24F 11/755: for cyclical variation of air flow rate or air velocity - F24F 11/77: by controlling the speed of ventilators - F24F 13/04: Air-mixing units (F24F13/06 takes precedence) - G05B 19/042: using digital processors (G05B19/05 takes precedence) - F24F 2011/0002: {for admittance of outside air} - F24F 2110/00: Control inputs relating to air properties - F24F 2110/10: Temperature - F24F 2110/12: of the outside air - F24F 2110/20: Humidity - F24F 2110/50: Air quality properties - F24F 2110/62: Tobacco smoke - F24F 2110/64: Airborne particle content - F24F 2110/68: Radon - F24F 2110/74: Ozone - F24F 2120/10: Occupancy - G05B 2219/2614: HVAC, heating, ventillation, climate control - Y02B 30/70: Efficient control or regulation technologies, e.g. for control of refrigerant flow, motor or heating - 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) - G05B: CONTROL OR REGULATING SYSTEMS IN GENERAL; FUNCTIONAL ELEMENTS OF SUCH SYSTEMS; MONITORING OR TESTING ARRANGEMENTS FOR SUCH SYSTEMS OR ELEMENTS (systems for controlling or regulating non-electric variables G05D; systems for regulating electric or magnetic variables G05F; control devices or systems insofar as characterised by mechanical features only G05G) - Y02B: CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS ## Abstract A ventilation system with: (i) a volumetric enclosure having an inlet and an outlet and for coupling to an interior of a building habitable by human occupants; (ii) a fan located within the volumetric enclosure and for drawing air exterior to the building and supplying the air to the interior of the building; (iii) a programmable control apparatus for enabling and disabling the fan in response to a plurality of parameters, at least some of the parameters relating to quality of air to be moved in response to the fan; and (iv) circuitry coupled between the inlet and the outlet for measuring a signal representative of a volume of air passing through the volumetric enclosure over a period of time. ## Claims ### Claim 1 A ventilation system, comprising: a volumetric enclosure having an inlet and an outlet and for coupling to an interior of a building habitable by human occupants; a variable speed fan located within the volumetric enclosure for drawing in air exterior to the building and supplying the air to the interior of the building; a user programmable controller for controlling the variable speed fan in response to a plurality of sensors, at least some of the sensors relating to quality of air to be moved in response to the fan; and a display configured by an input/output interface for displaying data representing a volume of air passing through the volumetric enclosure over a period of time; wherein the user programmable controller is programmed to control the variable speed fan during first and second periods of time corresponding to respective first and second air flow levels; and the plurality of sensors including at least a temperature sensor, a relative humidity sensor, and an air flow sensor for measuring and communicating signals of respective temperature, humidity, and air flow levels to the user programmable controller to provide control of the variable sped fan. ### Claim 2 (depends on 1) The system of claim 1 wherein the circuitry for measuring a signal comprises a hot wire anemometer. ### Claim 3 (depends on 2) The system of claim 2, wherein the inlet comprises an inlet duct and the hot wire anemometer is positioned in the inlet duct. ### Claim 4 (depends on 3) The system of claim 3 wherein the hot wire anemometer comprises a heated thermistor positioned at an axis of the inlet duct. ### Claim 5 (depends on 3) The system of claim 3 wherein the hot wire anemometer comprises a reference sensing thermistor positioned away from the axis of the inlet duct. ### Claim 6 (depends on 5) The system of claim 5 wherein the hot wire anemometer comprises the reference sensing thermistor positioned downstream in air direction from the heated thermistor. ### Claim 7 (depends on 1) The system of claim 1 wherein the user programmable controller is programmed to: control the variable speed fan during a first period of time to supply air to the interior of the building to satisfy a first air flow level equal to or exceeding a building standard; and control the variable speed fan during a second period of time to supply air to the interior of the building to satisfy a second air flow level equal to or exceeding a building standard, wherein the second air flow level exceeds the first air flow level. ### Claim 8 (depends on 1) The system of claim 1 and further comprising circuitry for storing data representative of the volume of air passing through the volumetric enclosure over the period of time. ### Claim 9 (depends on 8) The system of claim 8 wherein the data representative of the volume of air passing through the volumetric enclosure over the period of time is expressed in CFM. ### Claim 10 (depends on 1) The system of claim 1 and further comprising circuitry for communicating, external from the system, data representative of the volume of air passing through the volumetric enclosure over the period of time. ### Claim 11 (depends on 1) The system of claim 1 wherein the plurality of parameters includes at least one of pollen, ozone, smoke, radon, carbon dioxide, carbon monoxide, formaldehyde, VOC, N02, acrolein, particulates, building nominal occupancy, and building current occupancy. ### Claim 12 (depends on 1) The system of claim 1 wherein the plurality of parameters includes at least time of day. ### Claim 13 (depends on 1) The system of claim 1 wherein the variable speed fan comprises a first fan, and further comprising a second fan for drawing air from the interior of the building to exhaust to the exterior of the building. ### Claim 14 (depends on 13) The system of claim 13 wherein the volumetric enclosure further comprises recirculating apparatus for recirculating from the interior of the building back into the interior of the building. ### Claim 15 (depends on 14) The system of claim 14 wherein the recirculating apparatus comprises a damper under control of the programmable control apparatus and for closing in response to one more of the plurality of parameters. ### Claim 16 (depends on 14) The system of claim 14 wherein the recirculating apparatus comprises a dehumidifier. ### Claim 17 (depends on 14) The system of claim 14 wherein the recirculating apparatus comprises an air cleaning device. ### Claim 18 (depends on 1) The system of claim 1 wherein the programmable control apparatus further comprises circuitry for indicating that the volume of air passing through the volumetric enclosure over a period of time is below an acceptable threshold. ### Claim 19 (depends on 1) The system of claim 1 wherein the programmable control apparatus further comprises circuitry for indicating a failure in response to speed of the fan and the volume of air passing through the volumetric enclosure over a period of time falling below an acceptable threshold. ### Claim 20 (depends on 1) The system of claim 1 wherein the plurality of parameters comprise a user-assigned code indicating parameters associated with a user preference. ### Claim 21 (depends on 1) The system of claim 1 wherein the programmable control apparatus is affixed to the volumetric enclosure. ### Claim 22 (depends on 1) The system of claim 1 wherein a first portion of the programmable control apparatus is affixed to the volumetric enclosure; and wherein a second portion of the programmable control apparatus is remote from the volumetric enclosure. ### Claim 23 (depends on 22) The system of claim 22 wherein at least part of the second portion is located in a thermostat. ### Claim 24 (depends on 22) The system of claim 22 wherein at least part of the second portion is located in Internet of Things devices located at the building. ### Claim 25 (depends on 1) The system of claim 1 wherein at least one sensor in the plurality of sensors is affixed to the volumetric enclosure. ### Claim 26 (depends on 1) The system of claim 1 wherein at least one sensor in the plurality of sensors is remote from the volumetric enclosure. ### Claim 27 (depends on 1) The system of claim 1 and further comprising circuitry for detecting a speed of the fan. ### Claim 28 (depends on 27) The system of claim 27 and further comprising circuitry for identifying a potential fan failure in response to the circuitry for detecting a speed of the fan and the circuitry for measuring a signal representative of a volume of air passing through the volumetric enclosure over a period of time. ### Claim 29 (depends on 27) The system of claim 27 and further comprising circuitry for identifying a potential air flow restriction in response to the circuitry for detecting a speed of the fan and the circuitry for measuring a signal representative of a volume of air passing through the volumetric enclosure over a period of time. ### Claim 30 (depends on 13) The system of claim 13, wherein the second fan provides heat recovery ventilation to balance intake and exhaust air volume with respect to air temperature. ### Claim 31 (depends on 13) The system of claim 13, wherein the second fan provides energy recovery ventilation to balance intake and exhaust air volume with respect to air temperature and humidity. ### Claim 32 An integrated fan and sensor combination for use in a system to provide comfort ventilation of a building, comprising: a variable speed fan assembly mounted within a housing configured to duct outside air along an air flow path through the housing into an inside space of the building in response to fan control signals; an air flow sensor module comprising a substrate having a heated thermistor disposed along the axis of the air flow path and a reference thermistor disposed in the air flow path in a spaced-away relationship with the heated thermistor; first and second respective sensors for air temperature and relative humidity, disposed in the air flow path within the housing; and a user-programmable controller, including a control panel and a display, the controller coupled to the variable speed fan, the sensor module, and the respective sensors for air temperature and relative humidity, for generating the fan control signals to control the variable speed fan responsive to: user-defined minimum and maximum limits, entered via the control panel, for the air temperature and relative humidity of the outside air admitted to the housing via the fan and conducted into the inside space; and user-defined minimum and maximum limits, entered via the control panel, for the volume of air flow (CFM) supplied by the variable speed fan and conducted into the inside space; wherein the air temperature, relative humidity, and volume of the air flow into the inside space are maintained within the user-defined minimum and maximum limits to provide the comfort ventilation; and the volume of air flow (CFM) is displayed to the user on the display to confirm it is within the minimum and maximum user-defined limits for the desired comfort ventilation. ### Claim 33 (depends on 30) The combination of claim 30, wherein: the variable speed fan assembly includes a motor responsive to the fan control signals. ### Claim 34 (depends on 30) The combination of claim 30, wherein: the air flow sensor module comprises a hot-wire anemometer. ### Claim 35 (depends on 30) The combination of claim 30, wherein: the user-programmable controller varies the speed of the variable speed fan to maintain the volume of air flow (CFM). ### Claim 36 (depends on 30) The combination of claim 30, wherein: the user-programmable controller comprises a programmable device selected from the group comprising a microprocessor, a microcontroller, a digital signal processor, and an application-specific integrated circuit.