ALEXANDRIA, Va., March 19 -- United States Patent no. 12,253,273, issued on March 18.

"HVAC monitoring system" was invented by Daniel Xavier Dudek (Flower Mound, Texas).

According to the abstract* released by the U.S. Patent & Trademark Office: "An HVAC monitoring system includes a base unit mounted on a condenser and/or furnace that is electrically connected to a plurality of thermistors positioned at specific locations critical to efficient operation of the system. The base unit is in discrete wireless communication with a receiver positioned within the building interior where it is readily accessible and observable by the occupant. The receiver includes a display screen with indicators that visually inform a user of an alert condition....