I would have to say no. In the product description it says to use it on throw away 1 time filters. Since it works by spraying on a sticky coating that the errant dust is attracted to like a fly to flypaper. I would not think this would just rinse off. If you do buy this product test your cans to make sure they work immediately after receiving them. I bought 3 cans. The first worked fine. The second contained the product but no propellant. I had to argue with the counter person at my local store since it was outside the normal return window.
I would have to say no! Not only could the chemicals in the spray be harmful to you. The spray is sticky that's why dust particles stick to it. So everything would stick to it, think hair, flies, anything in the bottom of your purse, etc. P.S. I bought 3 cans of the 3 one had no propellant in it. Had to argue with woman at Home Depot to take it back since it was the second I had tried and was past 30 days. The mention of the fact that I have spent thousands of dollars in their store seemed to change her mind.
I use it on a disposable air filter, that means any filter that you use one time and change it out for a new one. If you are using a one inch filter and change it out every 30 days this work great it traps so much other smaller particle thing that get by a normal filter 1" filter. If you are using a reusable filter that some people do, you don't want to use this you will not get it clean. This is a great product to trap smaller particle that would go thru a normal 1" filter. If you are using a high efficient filter then you should not need this, but it would not hurt. Once you start using this product you wont quit.
It might be effective. It would not hurt to try. It certainly would cause the filter to be replaced more often because it would be very difficult to remove this oily substance from the filter by attempting to clean it on a repeated basis.
Yes, also read the instructions. Check filter more often due to the spray allowing more particles to be collected. Which is good for the unit.
the can states 'not intended for use on electrostatic filters'....so NOPE!!