Ventilation systems – poor fresh air supply and stale air removal

Cause

Grilles (external or internal) are blocked/dirty

Repair

  • clear obstructions from and clean external grilles as required

Cause

Air filters are clogged/require cleaning

Repair

  • clean or replace air filters

Cause

Ducts are blocked

Repair

  • remove blockages from ducts

Cause

Duct joints are not sealed resulting in air leakage through joints

Repair

  • seal open joints with duct tape

Cause

System is unbalanced due to differences in supply and exhaust ducting

Repair

  • call a specialist service/repair person