US 12,332,146 B2
Method and system for monitoring air leaks through a building envelope and controlling a ventilation system
Bjørnar Lie, Oslo (NO); and Per Magne Helseth, Heggedal (NO)
Assigned to AIRTHINGS ASA, Oslo (NO)
Appl. No. 17/310,642
Filed by Airthings ASA, Oslo (NO)
PCT Filed Feb. 10, 2020, PCT No. PCT/NO2020/050031
§ 371(c)(1), (2) Date Aug. 13, 2021,
PCT Pub. No. WO2020/167133, PCT Pub. Date Aug. 20, 2020.
Claims priority of application No. 20190206 (NO), filed on Feb. 14, 2019.
Prior Publication US 2022/0099521 A1, Mar. 31, 2022
Int. Cl. G01M 3/32 (2006.01); F24F 11/00 (2018.01); F24F 11/63 (2018.01); F24F 110/40 (2018.01); G05B 19/042 (2006.01)
CPC G01M 3/3254 (2013.01) [F24F 11/0001 (2013.01); F24F 11/63 (2018.01); G05B 19/042 (2013.01); F24F 2011/0002 (2013.01); F24F 2110/40 (2018.01); G05B 2219/2614 (2013.01)] 15 Claims
OG exemplary drawing
 
1. A method using a computer system to monitor air leakage in a building, comprising:
installing, in the computer system, a model which expresses air leakage rate as a function of pressure difference, said model being based on an obtained estimate of a correspondence between air flow through the building envelope and a difference in air pressure on respective sides of the envelope;
using a differential pressure sensor, which is communicatively connected to the computer system via a communication interface, to obtain a measurement of a current difference in air pressure on respective sides of the envelope and transfer the measured pressure difference from the differential pressure sensor to the computer system;
calculating a current flow of air per unit time through the envelope based on said model and said received measurement of the current difference in air pressure; and
performing at least one of
transmitting data a representation of said calculated current flow of air per unit time through the envelope, via said communication interface, to a computerized controller configured to control a ventilation system in the building to reduce the current flow of air per unit time through the envelope based on the transmitted data, and
using said calculated current flow of air per unit time through the envelope to control a ventilation system in the building to reduce the current flow of air per unit time through the envelope.