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.
Wizards Of The Coast is engaged in game development, branding and customer engagement services. Wizards of the Coast's Headquarters are located at 1600 Lind Ave SW, Renton, Washington, USA 98057-3305. Wizards of the Coast's CEO, Greg Leeds, currently has an approval rating of 100%.