The 3M Filtrete 1500 Smart Air Filter is a Bluetooth enabled home ventilation filter. It pairs with the Filtrete Smart App (iOS and Android), which is used to enable the filter’s Bluetooth module and track its useful life.
The 1500 Smart Filter uses a standard Filtrete 1500 filter for its base. Mine is the 16x20x1 size, but this applies to all dimensions of the filter. This is the same filter you can pick up at most stores, and it’s a high performing filter. The 1500 is a MERV 12 rated filter – looking at the MERV chart that means its rated for 1.0-3.0 µm particles. Therefore it should have no issue with dust particles/pollen/dander (3.0-10µm+), will offer pretty good filtration for smoke/smog (1.0-3.0µm), and some protection against airborne virus/bacteria (0.3-1.0µm). The 3 smart enabled filters – 1500, 1900, and 2200 all carry the same MERV 12 rating from what I can tell. However, 3M claims its additional MPR (Microparticulate Performance Rating) differentiates between the range. The MPR number is what classifies each filter – the 1500 is an MPR 1500 filter for example. I don’t fully grasp the MPR number other than maybe it’s a little marketing speak, but they claim better performance with microparticles (0.3-1.0µm) as you go up the range – even if the MERV rating is unchanged.
The only difference here is the Bluetooth module. You might wonder why does the filter need this, or that it is adding drastically to the cost. I definitely did. Having bought the 1500 filters in the past, I know that the BT module only adds about $5 to the cost, so its not drastically more expensive. As for the why – the app reminds you what the useful life is on the filter, when you installed it, the size of the filter you have, etc. This is actually really good information to track, and I know I have fallen victim to not knowing my filter size when going to buy a new one. These filters are recommended to be replaced every 3 months – for average use. If your house has poorer air quality the filter life will degrade more rapidly. You get some peace of mind if your filter reaches that lifecycle end prematurely. I’m fairly good at remembering to change my filter every few months, but I know that I forget time to time. Sometimes I swap it too soon as well, which costs me money. I know I could just write the install date on the filter every time, but that isn’t even 100% effective.
The function of the Bluetooth sensor is to measure the airflow through the filter. When filters get clogged up they start to become a barrier to airflow as the clogs increase the static pressure on the filter. The Bluetooth sensor relays the airflow data to the app to determine filter life. I have to figure that your day 1 airflow numbers are you set point, and your filter life is determined by how much airflow drop the filter sees over the course of time.
Installation orientation is important to the sensor. The sensor must live on the “clean” side of the filter so that the air passes through the back side of the sensor body. This is spelled out in the instructions located on the back of the packaging.
To monitor the filter life you just open the app, and it’s a pretty basic % of life number represented. I did have connectivity issues with the app not picking up the module, but that was cleared up in some location settings I had turned off. Not a big deal, for me anyways, to allow the app to use this info. If you are more privacy conscious and don’t want to share your location data, you could pair the filter with a tablet that lives at home. Either way if you have these concerns you might be more likely to by the sensor free version of the filter.
Overall the filter and app work well. I have kids in the home with allergies so switching out to higher performing filters has helped there. The Bluetooth app has worked seamlessly with the module, and it helps me keep track of my filter life. So far I’m trending on the average line for filter life, so the added cost of the Bluetooth module is only an extra $20/yr for me over a standard filter. That’s a cost I could certainly live with. I will have to see what sort of alerts/reminders I get when I get closer to the EOL for the filter.