No nitrogen to heat and exhaust: flue losses drop with flue volume — 10–25% fuel on typical furnace retrofits.
From our guide: Oxyfuel combustion — full context, charts and sources there.
Boilers, kilns, heat exchangers, valves and steam lines lose energy continuously. Inzonex makes patented (UK GB2508992.1) removable modular insulation — snap-fastened covers engineered per temperature tier, not generic off-the-shelf jackets: