Asko range hood ventilation notice — read this important safety alert for full details and affected models.
Grease accumulation inside the extraction duct of an Asko range hood is a serious fire risk that requires professional duct cleaning at least once per year in households that fry or cook with high-heat oils more than four times per week. The duct connecting the Asko CO-series or ceiling hood to the exterior vent cap can accumulate a thick layer of polymerized grease that is not visible during routine filter maintenance.
Unlike the surface grease filters which are easily accessed, duct interiors can only be effectively cleaned with purpose-built rotary cleaning equipment. A duct that has not been cleaned for several years can contain enough accumulated grease to sustain a fire independently, even after the cooktop is turned off.
Warning Signs to Look For
- Reduced airflow at maximum fan speed
- Visible grease staining or residue around the exterior vent cap
- Cooking odors lingering in the kitchen long after cooking is finished
- Grease dripping from the duct connection at the hood or at the ceiling penetration
- More than 12 months since the last professional duct inspection
Duct Maintenance Steps
- Schedule an annual professional kitchen duct cleaning, especially if cooking with high-fat methods is frequent.
- Between professional cleanings, wipe the first 30 cm of duct interior (where accessible after filter removal) with a degreasing cloth and a long-handled brush monthly.
- Check and clean the exterior vent cap flap and screen every three months to ensure free airflow.
- Ensure the duct has no sags or low points where grease can pool — this requires a professional inspection if the duct run is long or complex.
- Document the date of each professional cleaning and keep a service record with the range hood documentation.
Contact Information
Asko Consumer Support: 1-800-898-1879 | Professional kitchen exhaust duct cleaning starts from $120 for a standard run. Contact your Asko authorized dealer for referrals to certified kitchen exhaust cleaning contractors.
When to Call a Technician
If you see flames or smoke entering the duct during cooking, activate the range hood immediately and call the fire department — do not attempt to extinguish a duct fire with water. After any duct fire event, the duct must be professionally inspected and cleaned before the range hood is used again.
Related Resources
Review these related resources to stay informed about Asko appliance safety and maintenance best practices.
For more information, visit CPSC Safety Education and Asko Official Support.