div class=ts-pagebuttonPage 1button div class=ts-image amp-img class=ts-thumb alt=Page 1: TurndownsDiscussionpdfboiler efficiency when comparing a boiler operating With a modulating burner having a 10:1 turndown to the same boiler operating at a turndown The energy balance src=https:reader031vdocumentsusreader031viewer20220225175b09e4bc7f8b9a99488b5907html5thumbnails1jpg width=142 height=106 layout=responsive amp-img divdivdiv class=ts-pagebuttonPage 2button div class=ts-image amp-img class=ts-thumb alt=Page 2: TurndownsDiscussionpdfboiler efficiency when comparing a boiler operating With a modulating burner having a 10:1 turndown to the same boiler operating at a turndown The energy balance src=https:reader031vdocumentsusreader031viewer20220225175b09e4bc7f8b9a99488b5907html5thumbnails2jpg width=142 height=106 layout=responsive amp-img divdivdiv class=ts-pagebuttonPage 3button div class=ts-image amp-img class=ts-thumb alt=Page 3: TurndownsDiscussionpdfboiler efficiency when comparing a boiler operating With a modulating burner having a 10:1 turndown to the same boiler operating at a turndown The energy balance src=https:reader031vdocumentsusreader031viewer20220225175b09e4bc7f8b9a99488b5907html5thumbnails3jpg width=142 height=106 layout=responsive amp-img divdivdiv class=ts-pagebuttonPage 4button div class=ts-image amp-img class=ts-thumb alt=Page 4: TurndownsDiscussionpdfboiler efficiency when comparing a boiler operating With a modulating burner having a 10:1 turndown to the same boiler operating at a turndown The energy balance src=https:reader031vdocumentsusreader031viewer20220225175b09e4bc7f8b9a99488b5907html5thumbnails4jpg width=142 height=106 layout=responsive amp-img divdiv