Eridania Rodriguez

The mystery of a Manhattan mom who disappeared from her office-cleaning job ended with a tragic discovery Saturday: her body in an air conditioning duct, police said.

Eridania Rodriguez's remains were discovered at 8:50 a.m. between the 12th and 13th floors of 2 Rector St. after dozens of cops and sniffer dogs spent a second day searching.

The floor where her body was found is under construction.

A bad smell and missing ceiling tiles made search teams focus on the area, sources said. Shortly after the grisly discovery, police arrived at the family home in Inwood to break the news to Rodriguez's loved ones.

The 46-year-old was last seen alive Tuesday evening.