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2. Duct leakage testing - Wikipedia

   en.wikipedia.org/wiki/Duct_leakage_testing

   Duct leakage test in the US. A duct leakage tester is a diagnostic tool designed to measure the airtightness of forced air heating, ventilating and air-conditioning (HVAC) ductwork. A duct leakage tester consists of a calibrated fan for measuring an air flow rate and a pressure sensing device to measure the pressure created by the fan flow.

3. Blower door - Wikipedia

   en.wikipedia.org/wiki/Blower_door

   Duct leakage testing of forced air heating/cooling systems - both supply (vents) ducts and return ducts can be tested to determine if and how much they leak air. A duct test can be combined with a blower door test to measure the total leakage to outside, measuring effective leakage to the outside of the house only.

4. Register (air and heating) - Wikipedia

   en.wikipedia.org/wiki/Register_(air_and_heating)

   A register is a grille with moving parts, capable of being opened and closed and the air flow directed, which is part of a building's heating, ventilation, and air conditioning (HVAC) system. The placement and size of registers is critical to HVAC efficiency. Register dampers are also important, and can serve a safety function.

5. Jay Leno addresses rumors his facial injuries were related to ...

   www.aol.com/jay-leno-addresses-rumors-facial...

   Jay Leno paid his dues by appearing on fellow comedian Bill Maher's "Club Random" podcast.. The former "Tonight Show" host clarified a floating rumor that injuries to his face were from a beating ...

6. Duct (flow) - Wikipedia

   en.wikipedia.org/wiki/Duct_(flow)

   Inspections are typically visual, looking for water damage or biological growth. [5] [6] [7] When visual inspection needs to be validated numerically, a vacuum test (VT) or deposit thickness test (DTT) can be performed. A duct with less than 0.75 mg/100m 2 is considered to be clean, per the NADCA standard. [7]

7. Mystery drones now spotted over Staten Island as pols call on ...

   www.aol.com/news/mystery-drones-now-spotted-over...

   One such sighting was made by former Air Force Sergeant Walter Ziegler, of New Springville, who viewed the drones with binoculars from his apartment window, the Advance reports.