BROAD AirPro Rechargeable Electric Mask with HEPA Filter

This product is very good and No suffocation in this Mask, feeling well

This is my go to. Especially in crowded places because using just a regular face mask makes me feel suffocated. I have lung problems as well. So this actually pushes air into the mask through a hepa filter. Last for at least 8 hours and had different levels of air that can be pushed into your mask. I used it through the covid pandemic. Went shopping did my regular things without worry and never got sick while using the mask.

I don't like wearing masks for extend periods. I bought this mask several weeks ago to wear for extended periods in my wood shop. I especially need a mask when sanding and milling wood as I have develop an allergy to wood dust. I was worried that it would not perform well because it is so cheap. I have worn it many times for several hours at a time. It has performed above expectations.I have a vacuum system in my shop but it doesn't fully collect the finer dust. I thought I would try this cheaper alternative to a Trend style mask costing $500 or more. This thing is comfortable to wear, easy to breath while wearing, and, so far, has filtered all the fine dust my work has generated.While it comes with only rudimentary instruction, there are 4 blue lights that indicate the fan speed when running and they also indicate the charge state when charging. Very simple.It works so well you forget you are wearing it. That is a real plus. And, even though it is a hepa filter and not an organic filter, I could not smell the epoxy I was working with the other day while wearing it. That says a lot to me about the filter efficiency. So far I have not had any problems but, since it is so inexpensive, I can replace it repeatedly for the cost of a single Trend system. I highly recommend trying this simple device before investing in a more expensive powered air filter.

Pollution free breathing.

I have now bought several of these and have provided to friends and family. I used one on my first post pandemic flight myself and felt more comfortable that I was protected. I believe that after making minor modifications, the unit provides better filtration than an N95 mask alone because the positive pressure reduces the amount of leakage around the mask when you inhale. It also just feels more comfortable with the provided airflow. Since I am an engineer who was recently designing similar larger devices, I tested this filter with a laser particle counter looking for 0.3 micron particle size. I found that some air could bypass the filter around various leak paths. Covering the usb charge port during use was an improvement but finally I found that I could solve the issue with silicone caulk applied around the pcb inside under the filter. I have modified several this way now and confirmed performance. Prior to that modification, the filter performance was worse at high speed than low speed and sometimes marginally N95 caliber. After the modification, I get very low particle concentration around 200 particles per cubic foot in a room with background count around 500,000 particles per cubic foot. Prior to the change I was counting around 6000 - 8000 particles per cubic foot. So the bottom line: It IS more protective than an N95 filter and more comfortable. Its true that the tubing can kink and I suppose it could tear. So far I have not had those issues. I used a 3/8" leather punch to make more masks for it and found a different style mask that worked a little better for me. I have also measured the airflow rate with a hot wire anemometer and though there is some measurement uncertainty, I can affirm that its in the range of 2.5 - 3.0 CFM on the high setting.