The cost of a central air cleaner depends on the type of system, design, components, and number of stages. An increase in the energy use of the air system will eventually lead to higher energy bills over time. Portable ion filters, which operate without fans, send negative ion currents directly into the air. Poor indoor air quality can be inconvenient and potentially dangerous for residents of your home.
Both filters fit budget needs and, at the same time, have MERV values that provide adequate protection for your home. The MERV rating of the premium filter makes it ideal for parents and pet owners, especially in areas with high levels of allergens or contamination. Ion units, which do not require fans, are usually quieter than HEPA models and cost less to operate since there are no filters to replace. Manufacturers recommend that the CADR be at least two-thirds of the room area in square feet, so a 15 by 20 foot (300 square foot) room would need a filter with a CADR rating of 200.
The air around your home can have air problems that emphasize the importance of air system filtration. According to estimates by the Environmental Protection Agency (EPA), indoor air pollution can be two to five times higher than outdoor levels. While you can usually still get a home air purifier if you don't have an existing HVAC system, you'll need an HVAC professional to take a look to see if this is a possibility in your home. And the best filters trap indoor contaminants, such as dust, pet dander, and pollen, helping to clean the air in your home.
Filderman adds that while some allergic or asthmatic patients report benefits from air filters, the evidence remains anecdotal. Experts say that at home you can expect a HEPA filter to absorb about 80 percent of those particles. However, unless you're worried about having to replace the filter ahead of time, you can also set up a calendar reminder.