Faulty equipment
Faulty installation
Poor quality materials
Improper disposal of materials
Faulty operation
Inappropriate use of materials
Maintenance personnel problems
Poor air circulation
Inadequate ventilation
Lack of training
Clogged ducts
User operational mistakes
1
Faulty equipment
Faulty installation
Poor quality materials
Improper disposal of materials
Faulty operation
Inappropriate use of materials
Maintenance personnel problems
Poor air circulation
Inadequate ventilation
Lack of training
Clogged ducts
User operational mistakes
2
3
1
3
2
1
3
2
Faulty equipment
Faulty installation
Poor quality materials
Improper disposal of materials
Faulty operation
Inappropriate use of materials
Maintenance personnel problems
Poor air circulation
Inadequate ventilation
Lack of training
Clogged ducts
User operational mistakes
1
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2
Faulty equipment
Faulty installation
Poor quality materials
Improper disposal of materials
Faulty operation
Inappropriate use of materials
Maintenance personnel problems
Poor air circulation
Inadequate ventilation
Lack of training
Clogged ducts
User operational mistakes
Faulty equipment
Faulty installation
Poor quality materials
Improper disposal of materials
Faulty operation
Inappropriate use of materials
Maintenance personnel problems
Poor air circulation
Inadequate ventilation
Lack of training
Clogged ducts
User operational mistakes
Faulty equipment
Faulty installation
Poor quality materials
Improper disposal of materials
Faulty operation
Inappropriate use of materials
Maintenance personnel problems
Poor air circulation
Inadequate ventilation
Lack of training
Clogged ducts
User operational mistakes
Faulty equipment
Faulty installation
Poor quality materials
Improper disposal of materials
Faulty operation
Inappropriate use of materials
Maintenance personnel problems
Poor air circulation
Inadequate ventilation
Lack of training
Clogged ducts
User operational mistakes
Faulty equipment
Faulty installation
Poor quality materials
Improper disposal of materials
Faulty operation
Inappropriate use of materials
Maintenance personnel problems
Poor air circulation
Inadequate ventilation
Lack of training
Clogged ducts
User operational mistakes
Faulty equipment
Faulty installation
Poor quality materials
Improper disposal of materials
Faulty operation
Inappropriate use of materials
Maintenance personnel problems
Poor air circulation
Inadequate ventilation
Lack of training
Clogged ducts
User operational mistakes
Faulty equipment
Faulty installation
Poor quality materials
Improper disposal of materials
Faulty operation
Inappropriate use of materials
Maintenance personnel problems
Poor air circulation
Inadequate ventilation
Lack of training
Clogged ducts
User operational mistakes
Faulty equipment
Faulty installation
Poor quality materials
Improper disposal of materials
Faulty operation
Inappropriate use of materials
Maintenance personnel problems
Poor air circulation
Inadequate ventilation
Lack of training
Clogged ducts
User operational mistakes
Faulty equipment
Faulty installation
Poor quality materials
Improper disposal of materials
Faulty operation
Inappropriate use of materials
Maintenance personnel problems
Poor air circulation
Inadequate ventilation
Lack of training
Clogged ducts
User operational mistakes
3
3