3 ms·
if you don't mind a noise you could buy a 2nd hand vacuum cleaner with a built-in hepa or water filter (ideally also with adjustable speed to make it less noisy
by ivanhoe 7y ago
if you don't mind a noise you could buy a 2nd hand vacuum cleaner with a built-in hepa or water filter (ideally also with adjustable speed to make it less noisy) and just let it run without a hose, sucking the air and pushing it through the filter...
- adrianN 7y agoIf you don't mind the noise and wasting a kilowatt on something that can be done with two dozen watts.
- robryk 7y agoThe vacuum cleaner would have much larger airflow though. Would it still have higher energy usage per unit volume of air pumped? If not, then cycling the vacuum on and off would actually Dave energy compared to the small fan setup.
- ivanhoe 7y agoThat kW will move you more air in 30 minutes than PC ventilator can in a whole day, especially if you're trying to push it through hepa filter which is fairly thick and adds quite a resistance.
- clarry 7y agoMost vacs are adjustable. Also, I think they're trying to maintain a roughly constant speed of the fan, not a constant power. Which would mean that they reach peak power when airflow is obstructed, and idle at lower power when air is passing freely and motor is spinning with little resistance.
- deleted 7y ago[deleted]