{ "items" : [
    { "id" : "http://dbpedia.org/resource/Hydronics"
      "properties" : {
        "http://www.w3.org/2000/01/rdf-schema#comment" : [ "Hydronics is the use of water or another liquid heat transfer medium such as glycol as the heat-transfer medium in heating and cooling systems. Some of the oldest and most common examples are steam and hot-water radiators. Historically, in large-scale commercial buildings such as high-rise and campus facilities, a hydronic system may include both a chilled and a heated water loop, to provide for both heating and air conditioning."] } } }
