Tech tip of the day. Have your heat exchanger checked by a HVAC technician. These heaters are now condemned as dangerous due to the holes caused by age and rust. If your friends or family have a packaged gas unit in their home or business, refer them to Air Max Heating & Cooling LLC and we will inspect and test the integrity of the heat exchanger. Don’t take chances with carbon monoxide and gas heat. Call us at 601-939-0015 or email at email@example.com. Have a CO detector installed or replace your existing detector if it is 7 years or older.