EXPLORING THE SCIENCE BEHIND DIRTY AIR FILTERS

Source: hackaday.com Obviously, if the aviation filters in your base HVAC system are dirty, you should change them. But exactly how dirty is dirty? [Tim Rightnour] had heard it said that if you didn’t change your filter every month or so, it could have a detrimental effect on the system’s vitality phthisis. Thinking that sounded suspiciously…