The PUR5000 whole house furnace filter is an ideal choice for anyone who suffers from allergies, asthma or other respiratory illnesses. In fact, a high quality HVAC furnace filter should be your first step to improve your home's indoor air quality. This simple yet highly engineered device is a direct replacement to your disposable furnace filters. You will need an outlet to plug in the 12 volt power source and then once, every three months or so you will remove the filter and insert new filter collection media. It couldn't be easier and the results are the same, and in many instances better than the $2500 furnace filters sold by the HVAC professionals. Improve your air quality, reduce dust levels and keep your family healthier with the PUR5000 whole house furnace filter.