Your total cost for a diy box fan filter can be as low as 40 50 00 including incidentals like duct tape or higher depending on the filter options.
Diy box fan air filter front or back.
Some have wondered whether we should tape it onto the back of the box fan filter.
Take the back casing off of a box fan.
Locate the screws on the back part of the fan and turn them counterclockwise to remove half the case as well as the fan s handle if it has one.
Important tips while installing filter to the fan.
Select a fan you wish to use for your filter.
Make sure the arrows on the filter point towards the front of the fan or follow the same air flow of the fan.
Seal the filters to the fan with duct tape to capture the most particles.
The suction from the fan should also make the filter stick to.
Wow you are in luck because this nerd right here has been building and testing diy air purifiers to survive beijing for the last six years.
There will be a little arrow on the filter showing which way the air should flow.
I ve watch a ton of videos and some people put the filter on the front with a tiny piece of tape.
Take the fan put on the feet for stability tape one fancy high rated furnace filter to a lower rated filter then tape those to the back of the fan.
The ideal fan is a 20 in 20 in 51 cm 51 cm box fan since similarly sized filters are common.
Point that in the right direction and then tape onto the front of the box fan filter.
Make sure the filter is placed against the back of the fan.
Should air purifiers have the filter on the front or the back is it better to push or pull air.
Insofar as filter changing costs you will find that it is still much cheaper to buy furnace filters and variants of them without sacrificing on quality or air cleaning capacity.
20 inch box fan.
But if you have an air quality emergency on your hands regional wildfires or your charred dinner under the broiler and you have a box fan tape the right sort of filter and no time to get.
The smart air lab in beijing ran tests of the same fan with the hepa filter on either side and the results contradict most people s intuition.
To make one start by buying a merv 13 or fpr 10 furnace filter and tape it to the back of a box fan.
Box fans were not designed for use with filters and the safety of filter fans has not been.
To get started all you need are a 20 inch box fan and a 20x20x1 furnace filter merv 13 or higher once you have your materials place the filter in front of the fan with the airflow.
The filters sell for about 15.
When i made my first diy purifier i put the filter on the front.
