Flue                                     Air channel that allows the smoke or exhaust up the chimney

Damper                             Regulates the amount of smoke that goes up the chimney

Hearth                               The floor of your fireplace

Make up air                      This is the air needed for combustion or proper venting

Negative pressure            Will cause odor and smoke to come back into the home

Seasoned fire wood          That is wood that was split and let to dry for 1 year

Heating the flue               Some heat the smoke chamber with a torch of news paper to start draft

CFPM                                 Cubic Feet of air Per Minute, rating for airflow, for dryer vent

Louver                                This is a vent with flaps that close automatically when the dryer turns off

If you are not sure please just ask