div class=trans-pagebuttonPage 1button div class=trans-image amp-img class=trans-thumb alt=Page 1: 50tl 50 Burner Fan Hot Water NOT provided by Towngas No system controller is needed for water heaters but circulation function will not be available Typical Hi-Efficient N-Pack src=https:reader033fdocumentsnetreader033viewer20220418075e5551e026bad64e9919c22bhtml5thumbnails1jpg width=142 height=106 layout=responsive amp-img divdivdiv class=trans-pagebuttonPage 2button div class=trans-image amp-img class=trans-thumb alt=Page 2: 50tl 50 Burner Fan Hot Water NOT provided by Towngas No system controller is needed for water heaters but circulation function will not be available Typical Hi-Efficient N-Pack src=https:reader033fdocumentsnetreader033viewer20220418075e5551e026bad64e9919c22bhtml5thumbnails2jpg width=142 height=106 layout=responsive amp-img divdiv