Review on 🌬️ Biange Large Room Air Purifier with Smart Air Quality Sensor, H13 True HEPA Filter, Pet Odor Eliminator, Smoke & Dust Removal, Pollen Cleaner, KQ-26+ by Jill Graham

I have sinus problems and allergies and wake up EVERY morning with a headache and stuffy nose. Sometimes I would wake up with migraines which I believe were the result of allergies and sinuses. I was really hoping this cleaner would help. I regret to say that I will be returning it. PROS: very quiet at lowest fan speed, easy to use with clear instructions, looks good, great features. CONS: In automatic mode, the fan speed would randomly switch to the highest speed for 5-30 seconds and then return to the lowest speed (startled me several times when I woke up). I understand that the rate should change as the air quality changes, but I don't think the air quality will change in the middle of the night in an air conditioned home where nobody ever smokes and nobody cooks or stirs. Dust. I switched it from automatic to continuously low speed in hopes of fixing this problem that seems to have happened. However, no matter what I set for the fan, the device turns off after a few hours. I've never used the timer function, but it always turns itself off at night. I had high hopes for the Biange air purifier based on the good reviews (although there weren't many). I really, REALLY wanted this thing to work.