Old City Philadelphia is famous for its Row Homes. And, older row homes are equally famous for being uncomfortable in our humid summers because so many row homes don't have a central heating and cooling system, leaving folks to rely on window units to try to stay comfortable in the heat. This row home, built in the 1920's in Old City has a gas-fired water boiler and cast iron radiators for heat, but no central air at all. This means relying on bulky window air conditioners that are a pain to install and take down seasonally, and actually block up your windows for a good part of the year as well! On top of that, window units are not very efficient and expensive to run, and our homeowner was looking for a better solution for his new home.