While The Home Depot uses FPR, the industry standard is to use the air filter rating system of Minimum Efficiency Reporting Value (MERV). The MERV rating system helps you choose the filter right for you, with each rating dictating the effectiveness of a filter. The higher the MERV rating, the more efficient the filter, and the more a filter can catch harmful pollutants. 
High airflow helps reduce strain on your heating and cooling system and requires less energy, which can translate to savings for you! When a filter becomes extremely clogged, airflow through the filter begins to slow, which can force an HVAC system to work harder to compensate. Replacing a disposable filter every 60-90 days can be inconvenient and expensive—instead, you can simply rinse clean your K&N lifetime washable furnace filter to help keep your HVAC system running smoothly.

People moving to and from tiny houses and small apartments might not be concerned when a portable storage container offers only one size container that fits about a room or a room and a half's worth of stuff. But those of us moving from larger homes must take this into consideration. Door to Door's standard moving container is 56 inches wide by 93 inches long by 77 inches tall on the inside. Its door opening is 46 inches wide by 74 inches tall. You can fit about one room of stuff in there, maybe a little more, according to the website. PODS has really spoiled people because it offers different sized containers. Now, I should mention that, according to the customer documents on the site, Door to Door also has an alternative wood container and an alternative metal container, which are at least slightly taller. But they are not available in every market and they are not highly publicized. I only stumbled upon them by scouring the customer documents, such as terms and services and an addendum about the specifics of the company offerings.
Similar to fiberglass filters, disposable pleated polyester filters have a sizable surface field and a rating of 5 to 13. The pleats increase the surface area and make the furnace filters more efficient at capturing airborne particles. A pleated air filter with a medium efficiency rating can filter small to large particles. Filters with a rating of 7 to 13 provide a level of effectiveness compatible with absolute high-efficiency particulate air (HEPA) filters, but at a lower price point.
Just an observation, as I've tried to educate myself about home filtration systems, I have found a surprising number of sites that try to appear unbiased, but with a little reading can be seen to be favoring filters over all other system types. It may be that filters are better for certain applications. But the fact that they're being sold as 'all-things-to-all-people' makes me suspicious. The fact that at least a couple of sites (usually .org sites) appear to be hiding their identity also makes me suspicious. It also makes me wonder what so good about the non-filter systems that has the filter folks so worried.
That’s what comes to mind for most people when you mention a filter in a house.  One of the first things you should do when taking possession of a house is to change the furnace filter.   Think about it – it’s got other people’s dust and dander on it.   Start fresh.   Write down  the size and note which way it’s installed.  With some filters it matters which direction the air is flowing, so don’t get it backwards.  Check your furnace manual to be sure what you should have.    Most large hardware/home stores carry the standard sizes.   Replace it at the start of each heating season, at least.   If you have central air conditioning, this filter will be catching stuff year round. Check it monthly and change it if it looks dirty.
We offer the high-performance, ANSI/NSF tested and California certified CB Tech Water Filters Water Filters, the top-rated water filter by Consumer Reports. These quality filter systems are Made in the USA and ANSI/NSF tested and certified for Standards 42 & 53 to remove Chlorine, Chloramine, VOC's, PCBs, Lindane, Silvex, MTBE Chloroform, 2,4-D, Lead and other heavy metals, Giardia, Cryptosporidium and Pesticides, Fertilizers, Xylenes and many more unpronounceable organic compounds. Some models of CB Tech water filters will also even filter out Arsenic. And for the most difficult water treatment situations, we also offer Reverse Osmosis Systems that remove the broadest spectrum of contaminants.  And don't forget NSF Standard 177 Certified Shower Filters, available in both hand held and shower head shower filters by Sprite and Rainshow'r.