http://www.karenmaezenmiller.com/blog I was trying to find a way to pin this with it linking directly to Karen's blog, who actually wrote it. Best I can do is the above link, and the blog this takes you to does a beautiful job of illustrating it.
Home Owner's Manual: Annual Home Maintenance Calendar - Really good information to know! So many of these things can get overlooked, but if you stay on top of them, they probably make a world of difference in your home's health and efficiency.
"My husband owned his own A/C business for a long time....he said everything on here is the PROPER way to do this.....do it yourself, will make unit not work so hard and you save $ by not paying the A/C company!"