▁ ▁Air ▁supply ▁ ▁Keep ing ▁the ▁air ▁flow ing ▁correctly ▁through ▁a ▁wood - burn ing ▁st ove ▁is ▁essential ▁for ▁safe ▁and ▁efficient ▁operation ▁of ▁the ▁st ove . ▁F resh ▁air ▁needs ▁to ▁enter ▁the ▁fire box ▁to ▁provide ▁o xygen ▁for ▁the ▁fire ; ▁as ▁the ▁fire ▁burn s , ▁the ▁smoke ▁must ▁be ▁allowed ▁to ▁rise ▁through ▁the ▁st ove ▁pipe , ▁and ▁exit ▁through ▁the ▁chim ney . ▁To ▁reg ulate ▁air ▁flow , ▁there ▁may ▁be ▁dam per ▁devices ▁built ▁into ▁the ▁st ove , ▁fl ue , ▁and ▁st ove ▁pip es . ▁ ▁By ▁opening ▁or ▁closing ▁the ▁d amp ers , ▁air ▁flow ▁can ▁be ▁increased ▁or ▁decre ased , ▁which ▁can ▁fan ▁the ▁fire ▁in ▁the ▁fire box , ▁or ▁" d amp en " ▁it ▁by ▁restrict ing ▁air flow ▁and ▁reducing ▁the ▁fl ames . ▁The ▁d amp ers ▁can ▁usually ▁be ▁accessed ▁by ▁turning ▁kn obs ▁or ▁handles ▁attached ▁to ▁the ▁dam per . ▁Some ▁st ov es ▁adjust ▁their ▁own ▁air flow ▁using ▁mechanical ▁or ▁electronic ▁therm ost atic ▁devices . ▁ ▁The ▁highest ▁he ating ▁effic ien cies ▁on ▁closed ▁app li ances ▁can ▁be ▁att ained ▁by ▁cont rolling ▁the ▁various ▁supplies ▁of ▁air ▁to ▁the ▁st ove ▁( oper ating ▁the ▁air ▁controls ▁correctly ). ▁On ▁modern ▁st ov es , ▁owner ' s ▁manual s ▁provide ▁documented ▁procedures . ▁Ful ly ▁open ▁air ▁controls ▁may ▁lead ▁to ▁more ▁heat ▁being ▁sent ▁straight ▁up ▁the