We love old houses, but sometimes renovating them can lead to frustration. While construction on older homes is known to be sturdy, many of them come without modern conveniences—like central air conditioning. In this episode, This Old House Home Technology Expert Ross Trethewey gives advice to homeowners on how to add an efficient central air system to a historic 1913 row house in Washington, D.C.Learn more about your ad choices. Visit megaphone.fm/adchoices