Airfryer heating elements release emissions even when empty
Residual fat and food particles buildup on the internal heating elements of airfryers can cause a significant increase in emissions during use, even when the cooking basket is empty, according to a study published in the journal ACS ES&T Air.
Researchers at the University of Birmingham discovered that these hidden residues contribute to the release of volatile organic compounds (VOCs) and ultrafine particles. While users typically focus on cleaning the removable basket, the ceiling and heating components of the appliance often collect grease that remains untouched during standard cleaning routines, Healthy Now reported.
Empty airfryer tests show 23 percent increase in VOCs
The University of Birmingham study utilized specialized testing chambers to monitor a 4.7-liter airfryer. Scientists first prepared various food types, including lean products, high-fat items, and pre-fried frozen foods, to observe different emission levels.
To isolate the impact of residue, researchers conducted a control experiment by heating the device while it was completely empty. After performing 70 cooking cycles, the team measured a 23 percent increase in cooking-related volatile organic compounds compared to the initial tests. This cycle also resulted in a measurable rise in ultrafine particles. The researchers attributed these findings to accumulated grease and food remnants that had settled on the interior ceiling and heating elements over time.
Research findings do not indicate immediate health risks
Despite the measured increase in emissions, the study’s lead researcher, Christian Pfrang, noted that the findings do not present an immediate cause for concern for families. The research was designed to map which substances appear in the air during operation rather than to determine if those substances cause specific health ailments in users.
The study also clarified that the 70-cooking-cycle mark was a specific measurement point for the test setup and does not serve as an expiration date for the appliance. Airfryers continue to produce significantly lower emissions than traditional deep-frying or pan-frying methods involving large amounts of oil.
Maintenance steps to reduce kitchen emissions
To minimize the buildup of residues that trigger these emissions, users can implement specific cleaning habits for the internal housing of the device. Experts suggest the following precautions to maintain the appliance without damaging its components:
- Always unplug the device and allow it to cool completely before attempting to clean the interior.
- Use soft materials, such as a sponge or a soft brush with warm water and mild dish soap.
- Avoid using steel wool or abrasive scouring pads, as these can damage the non-stick coating and cause future food buildup.
- Consult the specific manufacturer’s manual to confirm which parts are dishwasher-safe and to ensure the unit is fully dry before the next use.
Cleaning the “ceiling” or the upper interior area of the airfryer in addition to the basket can help keep the device hygienic and keep kitchen emissions at a lower level.
Does an empty airfryer produce emissions?
While the study noted an increase in volatile organic compounds and ultrafine particles when the device was empty, it specifically linked this to the heating of accumulated grease on the ceiling and heating elements.
Will cleaning the heating element damage my airfryer?
The study suggests using soft materials like a sponge and mild detergent. Using hard tools like steel wool should be avoided because it can strip the non-stick coating, which actually makes it easier for grease to stick in the future.
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