In short, yes. Opening or closing a window doesn’t matter—an air purifier is going to purify the air regardless. That said, keeping the doors and windows closed will help your air purifier to maximize its effectiveness since external pollutants aren’t able to come in.

Sometimes. The packaging will tell you the maximum area (per square foot) that the air purifier can protect. Comparing this square footage to that of your home should help you better understand what’s needed.

Allergies acting up? That could be a sign that your air purifier isn’t working at full speed.

Check the assembly for any dust or dirt in the pre-filter after cleaning it. If you don’t see anything obvious that could be causing a problem, that may be a sign that there’s a more significant issue with your air purifier. For a clearer understanding of its effectiveness, you may need an air quality monitor.

The lifespan of an the filters varies, depending on where you live and the frequency of use. In reality, there is no “one size fits all” when it comes to knowing when to replace an air purifier.

It depends on a few things. For example, although electricity is a secondary cost associated with running an air purifier, the energy efficiencies of the device will impact how much it costs to operate. You’ll also need to buy new filters from time to time. If you invest in a high-quality HEPA filter, you will have to change it every 3-5 years. There are cheaper filters available, but they’ve been proven to be less effective and need to be replaced more often.

Generally speaking, there are no side effects. However, there are a few purifiers on the market that use electrostatic precipitators and ionizers; these *may* emit small levels of ozone. Before buying an air purifier, make sure to check the product specifications.

The best air purifier for someone with asthma is one with both a HEPA filter and an activated carbon filter. An air purifier with both filter types will remove particles and gaseous pollutants that can cause asthma.

No. Air purifiers prevent asthma symptoms and allergies by filtering out airborne allergens like pollen, dust, and animal dander. However, they do not cure asthma and allergies. Purifiers are more of a preventive measure; not a cure.

An activated carbon filter is very effective at removing odors. They can eliminate smells from smoke, pets, food, garbage, and even baby diapers. Other types of filters, such as HEPA filters, are not as effective in removing odors as they are in eliminating pollution particles.

This depends on multiple factors including the condition you want to treat, square footage, CADR rating, frequency of filter replacements, type of controls, and much more