Here is a great one for you! This company will ship you a new filter every couple of months, with a great price and awesome introductory offer! Their automatic program is great if you tend to forget to change yours (we ABSOLUTELY forget). With the free shipping included (and NO membership fees), this is a good deal in my opinion. Click the image below to get more information, and your first order FREE!!! Once you receive your first order (or after any order in fact), you can cancel at any time if the service is not for you. Shipping for this offer is around $3. This is a GREAT introductory offer to try out this new service!!!