I have a relatively large home that was built nearly 50 years ago. I loved the older style of the home and have worked to make several improvements to help with energy efficiency. I have had the attic and walls insulated and have replaced many of the windows, but the upper level of my home continued to be much colder than the rest of the home. After a few winters of using space heaters to keep the upper levels warm, I finally broke down and called an HVAC contractor to help me find out what was causing the problem. This blog will show you what the problems could be if you have a similar situation as mine.