One of the things that you should check is MERV ratings. It is advisable that you go for an air filter with higher ratings ranging from 5-14. The benefit of higher rating is that it has higher efficiency in removing dust and other contaminants. The MERV always rate air filters according to their ability to remove dust and other contaminants. Being that the ratings always start from 1 to 20 you will not expect the filter that is rated 1 to work better than the one that is rated 20 which cannot be in real sense. You should also know that there are some tough stains that can only be removed by air filters with higher ratings.
Apart from that, you should also consider their pricing. The prices of the air filters often vary according to their ratings. As a result, the ones with higher ratings their prices are set high while the ones with lower ranks their prices are set low. One thing that should guide you in this is to weigh the price against efficiency. It is recommended that instead of purchasing cheap low-quality filters, you should find the ones that are affordable but they can remove the dust efficiently. This is something that you can only achieve by taking your time to shop around for some of the best deals.
Size of the air filters is also another factor that you should consider. It is important that you know the size of the existing filter to know the one to go for. Filters always come with indicated sizes of which you should confirm if not you should just take the measurements. Another thing you should make sure that the air filter you are choosing can fit well into the ventilation system of your house.
It is also important that you check the size of particles the filter can capture. Of which you should choose the one that can capture many dust particles. One thing that you should know is that this will not eliminate the dust completely but at least it will reduce the frequency at which you dust the house.
References can also help you in finding the best filters. This is important since some of your friends who have experience with filters will tell some of the models they are using. This is one of the surest ways since they have been using the air filter previously.
You can as well use some online research. Browse through the sites of some of the dealers of air filter and you will be able to come up with better results. By looking at the reviews and ratings you will be able to get some of the best air filters.