I am a person who always likes to think ahead. And in thinking ahead I can plan for things. This is the main reason that when I buy air filters for my central heating and air conditioning system I always buy them in large bulk twice a year. This saves me time and headache of having to keep going out and buying a small pack of 2 every single time I run out. This also can save money as well if I find a sale on air filters somewhere. Usually it is online where I find the good discounts on bulk air filters. Especially when it comes to HEPA brand air filters. Which HEPA is the brand of air filters that I prefer to buy if I can find them on sale. At regular price they are a bit too much for my budget. However when they are on sale they end up being around the same price as the regular good brand air filters that I buy for my central heating and air conditioning system unit. As a matter of fact I just bought my bulk for the first time this year. And guess what? They had the great HEPA brand air filters on sale! The HEPA air filters I was able to buy will make the indoor air quality of my home even better than the regular air filters because in a way HEPA air filters can act as an indoor air cleaner. So I really lucked out that the HEPA air filters happened to be on sale!