While modern building materials are very good at keeping the heat out, they aren't perfect. My house was built without awnings or AC and with modern window tech

While modern building materials are very good at keeping the heat out, they aren't perfect. My house was built without awnings or AC and with modern window tech, but we opted to have awnings and screens installed nevertheless and they made a huge difference in how much heat from sun is coming into the house (not to mention the bright light itself). For my case, I think it's irresponsible to be installing AC without first making sure the house is optimized for keeping the heat out.