For some, winter means overheated apartments and clanky radiators, but for homeowners it’s more often a struggle to keep an inefficient home cheaply warmed. What many don’t realize is addressing energy loss by decreasing cold air infiltration are often relatively simple fixes with associated costs far lower than continuing to jack up the heat. Improving a home’s overall thermal envelope doesn’t always require renovation, and small changes have far-reaching implications. Here is a look at five problem areas that cause heat loss in colder climates and older homes with some potential solutions to explore.