Insulation of chimneys: All fuel-burning equipment using Heavy Fuel Oil or other liquid fuels with a sulphur content equal to or greater than 2.5 % by weight must be fitted with a fully insulated chimney using either a 25mm air gap or mineral wool insulation to prevent the formation of acid smut.
Ukogquma ngerabha iitshimini: Zonke izixhobo ezitshisa amafutha ezisebenzisa i-Oli yaMafutha aMakhulu okanye amanye amafutha olwelo afakwe isalfure elingana okanye engaphezu kwe-2.5 % ngokobunzima mazifakelwe iitshimini ezogqunywe ngokupheleleyo kusetyenziswa isithuba somoya esiyi25mm okanye isixhobo sokogquma ngewulu yeminerali ukuthintela ukwakheka kwesidyobho se-asidi.