A heat exchanger is bad if gas leaks from one side of the heat exchanger to the other. In other words if the exhaust gases from the flames are allowed to enter your home, or vise versa. Certification ensures that the heat exchanger is not leaking. In most cases you need to replace the furnace.
ODIN technologies. ODIN provides RFID (Radio-Frequency Identification) software and solutions for the Aerospace, Government, Healthcare, Financial Services and Social Media markets. ODIN's world headquarters is located in San Diego, CA. ODIN was acquired by Quake Global in December 2012 and continues to focus on healthcare and asset tracking.
I donât disagree with Jesse Novotny. That could well be the Phoenix office although it sounds more like a Tempe office. Uber has an Arizona office at 111 W Monroe in Phoenix as of February 5, 2015. Uber opens headquarters in Downtown Phoenix. Uber, a $40 billion company, will use this location as their Arizona operations office. A social juggernaut, Uber has become a household name by delivering on-demand car service at the touch of a button.