A commercial HEPA filter does not have one replacement schedule that applies to every building. Some filters may last for years. Others may load much faster because of dust, operating hours, construction activity, smoke, or other airborne particles. For a commercial system, the right replacement time depends on: How heavily the filter is loaded How many hours the purifier runs The amount of pre-filtration...

A negative pressure air machine is used to control where air moves. Instead of simply cleaning air and returning it to the same room, a negative-air setup removes air from a contained space so the pressure inside becomes slightly lower than the pressure outside it. When the setup is working correctly, air tends to flow: From the cleaner surrounding area → into the contained...

Office air filtration works best when the building's HVAC system and room-level air cleaners are treated as different parts of the same plan. The HVAC system can provide filtration as air moves through the building. A commercial HEPA air purifier can provide additional filtration inside specific offices, meeting rooms, reception areas, or open workspaces. For most offices, the main questions are: What filtration is...