3 ms·
I've been running a 3M Filtrete MPR 2800 in my furnace filter. https://www.purpleair.com/ https://www.purpleair.com/ confirms it works. There house averages m
by pwarner 8y ago
I've been running a 3M Filtrete MPR 2800 in my furnace filter. https://www.purpleair.com/ https://www.purpleair.com/ confirms it works. There house averages maybe 60 PM 2.5 vs 200 outside.
Don't know how good it is for furnace, but it hardly runs otherwise in Northern CA.
- mikenew 8y agoDo you have two air sensors, or do you just have one indoors and compare it with weather data?
- pwarner 8y agoI am relying on 2 purple air sensors 10 miles away in opposite directions for an outside estimate. They are usually within 10%, and we are in the same valley, so should be close. I also see when I stop the furnace fan, levels spike. Then drops when I turn on again...
- deleted 8y ago[deleted]