The common assumption is "bigger grill = more charcoal." The real answer is more nuanced and often surprising.
For a typical 45-minute burger cook, the 22-inch kettle uses approximately 1 chimney of charcoal (~80 briquettes). The 26-inch kettle uses approximately 1.25 chimneys (~100 briquettes). That's 25% more fuel for 40% more cooking space — meaning the 26 is actually MORE efficient per square inch.
For longer cooks (2-hour ribs, 4-hour pulled pork), the efficiency gap widens. The 26's larger charcoal grate can hold a longer "snake" of coals, which produces more steady burn over longer periods. Many 26-inch owners report their long cooks (8+ hours) use similar or slightly less total charcoal than the same cook on a 22-inch with refueling.
Community consensus from multiple forum discussions:
- 22-inch per-cook fuel: baseline
- 26-inch per-cook fuel: 10-30% more for short cooks, similar for long cooks
- Per-square-inch fuel efficiency: 26-inch is actually BETTER than 22-inch
The "bigger grill uses more fuel" assumption is technically true (more charcoal per cook) but practically misleading (much more cooking capacity per charcoal load). The real argument against the 26 isn't fuel cost — it's price, space, and lid weight.