These photos show common code violations.
What is the difference between this and the dryer vent system? They both build up lint, which can be a potential fire hazard. Dust, dirt and lint around the firebox can gas off and put unpleasant odors in your home. This photo shows the lint and animal hair that is next to the gas line, inside the firebox. This is one more reason why all Gas Fireplace Manufacturers recommend an annual maintenance service be performed by a Certified Gas Fireplace Specialist.
Before & After: These photos show the fireplace before being serviced.
Before the Service:
Dust can collect on or around the components and cause a fire hazard, and/or prevent the fireplace from properly functioning. Also, if the glass isn't cleaned often enough, then the soot can be permanently etched into the glass.
After the Service:
This is the same fireplace after the annual maintenance service was performed. The glass is cleaned. The components are cleaned and adjusted. The fireplace was tested for carbon monoxide and other natural combustible gas leaks.