Yes, after assuring a safe evacuation! Carbon Monoxide is an odorless, tasteless, invisible gas. CO detectors are very sensitive and designed to alert occupants prior to CO reaching deadly levels. If your detectors go off, call the Fire Department and evacuate the home. Be sure to notify the Fire Department if anyone in the home is experiencing flu-like symptoms. The Fire Department has specialized equipment to detect and measure amounts of CO in your home. Please DO NOT open doors and windows before the Fire Department arrives, because this makes it difficult to determine the cause of any CO that may be present. NEVER hesitate to call us.