div class=ts-pagebuttonPage 1button div class=ts-image amp-img class=ts-thumb alt=Page 1: choose from among many types of stand- alone heating units Direct-vent wall furnaces and vent-free fan convectors are just two options for bringing heat to specific spots Direct-vent src=https:reader035vdocumentsusreader035viewer20220816115f08a31d7e708231d422fd8chtml5thumbnails1jpg width=142 height=106 layout=responsive amp-img divdiv