I use Can-filters brand only. Can-filter 66 and 75(400 and 600 cfm) for flower rooms that run year-round. I replace every 12-16 months. I have a Can 50 in main veg that has lasted 16 months and is still going, that room runs year-round. I also have a small tiny one for my dry room, can't remember the Can model number but being I only have it running about 10 days every month so that should last many years.
It's good to have a spare for each flower room. In veg you don't always need them but I would never run any room without one except my seedling/clone room.
So you spend about $400ish every 12ish months on flower room filters...plus more when you have to replace the veg room filter...That seems like it could add up. lol
What if you could get a product that extended the life of a carbon filter up to 200% (possibly beyond), that would not only eliminate (not just trap, like current carbon filters) odors, but would also trap and kill pests, molds, fungus, bacteria, germs, microbes, pollen, and any VOC pollutant that makes its way into your room...Do you think people would be interested in something like that?
Happy