You can get a small one for a single one or have one installed in the ductwork to do the entire house
I love opening my windows to let a fresh breeze in the house. In Sioux Falls, SD there aren’t many opportunities to do that. I wait all year for the weather to be moderate and I turn off my heater. I then open the windows and doors to get that stale, stuff air outside. Having the fresh air blow inside is downright shocking. The smell is what I always notice. It is so much cleaner than what I deal with. It also just feels like better air. I know it is the best thing for my air quality. During the winter everything is sealed up so tight that nothing new is coming inside. On the hand this is better for the heater, but on the other hand it is a detriment to my air. I have started looking at air purification plans to put some cleanliness back into my air. I can’t open the windows during the winter. It just isn’t possible. The temperatures get too low. So I need to take care of the issue in the house. I bought HEPA filters that catch more dust, dirt, and hair than the normal filter. That helped a bit. Next was getting the air purifier. You can get a small one for a single one or have one installed in the ductwork to do the entire house. That is what I opted for. I will cut out that nothing this means I have to do monthly air filter changes and call for service on the system. It is expensive but I feel it is worth every cent.