Ductless Exhaust Hood with Air Purifier 100 cm

Layer 1 (filter fabric + activated carbon for trapping grease/odors)
Made of synthetic fiber blended with activated carbon
Main functions:
Traps oil vapor / grease (e.g. in kitchens)
Absorbs odors
Usually the "first stage" of filtration

Layer 2 (HEPA filter, grade H11)
HEPA (High Efficiency Particulate Air) standard
Grade H11:
Filters approx. 95% of fine dust
Captures:
PM2.5 dust
Pollen
Some mold / bacteria
👉 The "main stage" for cleaning the air

Layer 3 (granular activated carbon)
Uses granular activated carbon
More effective than sheet carbon at:
Absorbing strong odors
Removing chemicals / VOCs (e.g. paint or chemical smells)
👉 Usually an additional stage after the HEPA filter

Layer 4 (nano photocatalyst)
Uses materials such as Titanium Dioxide (TiO₂)
Works when exposed to light (UV or certain light):
Helps break down bacteria and viruses
Reduces odors and organic compounds
👉 A "sterilize/decompose" technology rather than a filter