Do bigger ceiling fans score higher on CFM/W?
Mostly, yes. On the certified list the standard-fan median rises from 184 CFM/W at 52 inches to 229 at 60, 266 at 68 to 72 and 293 at 84 inches, a gain of 59%. High-speed draw rises less over the same range, 39%. The climb is not smooth, though: 42-inch fans outscore both the 44- and the 52-inch groups.
The pattern across ten spans
The chart shows the middle 80 percent and the median of standard downrod fans in each span. Read from the top, the medians fall from the small fans to 52 inches and then climb steadily.
Standard (downrod) fans. Bar: middle 80%. Dot: median.
Fans under 42 inches sit far below everything else, with a median of 104. The 42-inch group then jumps to 217, higher than the 44-inch group at 191 and the 52-inch group at 184. From 52 inches upward every step is a gain except one: at 62 to 66 inches the median matches the 60-inch group exactly.
Step by step
The table compares each span with the next smaller one that has its own page, for both CFM/W and watts on high.
| Step | Median CFM/W before | Median CFM/W after | CFM/W change | W on high change |
|---|---|---|---|---|
| 42 in → 44 in | 217 | 191 | −12% | +51% |
| 44 in → 52 in | 191 | 184 | −4% | +27% |
| 52 in → 54 to 58 in | 184 | 213 | +16% | +3% |
| 54 to 58 in → 60 in | 213 | 229 | +7% | +2% |
| 60 in → 62 to 66 in | 229 | 229 | +0% | +6% |
| 62 to 66 in → 68 to 72 in | 229 | 266 | +16% | +4% |
| 68 to 72 in → 84 in | 266 | 293 | +10% | +21% |
Two steps run backwards on CFM/W: 42 to 44 inches and 44 to 52 inches. The 52-inch dip matters most, because it is the most common span on the list. It is also the span with the widest spread between strong and weak models, and its median is pulled down by a long tail of low scorers. The best 52-inch fans score far above the median of larger spans.
Watts move differently. Among the spans with a page, the median draw on high rises at every step, so a larger fan that scores better on CFM/W still usually draws more power on high. The two measures are separate on the list and separate in the fan table.
Where the fans are
The spans are far from equal in size. The 52-inch group alone holds 297 of the 712 listings, 42% of the list; the 60-inch group comes second with 139. Every other span holds fewer than 71. A median from 238 standard fans and a median from 15 carry very different weight, which the step table above does not show on its own.
Why the 42-inch group scores high
The 42-inch group is small, 14 standard fans, and one brand shapes it. Aeratron has 6 of those fans, with a median of 314 CFM/W; the other 8 post a median of 157. Take that brand out and the 42-inch median would sit below the 44-inch group. One brand's models can move a small span this far, which is why the span pages always name the fans behind a median.
Low speed
Low-speed draw does not climb as neatly as draw on high. The median is 2.7 W at 42 inches and 5.8 W at 84 inches, but the spans between move up and down along the way. Because the weighting behind CFM/W includes low speed, a fan has to do well on both speeds to reach a high figure.
HSSD fans follow the same line
The high-speed small-diameter fans, all from one brand, are weighted differently and are never set against standard fans. Within their own class, though, the pattern repeats: their median rises with every step in span.
| Span | HSSD fans | Median CFM/W |
|---|---|---|
| 44 in | 1 | 242 |
| 52 in | 8 | 268 |
| 60 in | 15 | 282 |
| 68 to 72 in | 6 | 316 |
| 84 in | 8 | 382 |
Where the pattern stops
Size is not the whole story even within the pattern. At every span the strongest fans beat the median of much larger spans: the best 52-inch fan, at 366.7 CFM/W, is above the 84-inch median of 293.
The top spans hold few fans. There are 15 standard fans at 84 inches and 51 from 68 to 72 inches, against 238 at 52 inches, so their medians rest on a small number of models from a small number of brands. The range bars show it: from low end to high end the 84-inch bar covers 187 CFM/W.
The figures also say nothing about which span suits a room; the list does not cover that, and neither does this site. What they do show is that a CFM/W figure has to be read against fans of the same span. A 52-inch fan at 250 CFM/W is well above its group; an 84-inch fan at the same figure is below its own. The span pages give each group's full ranking.
Sources
U.S. Environmental Protection Agency, ENERGY STAR Certified Ceiling Fans (data.energystar.gov, dataset 2te3-nmxp), retrieved October 27, 2026. Medians, percentiles and ranks are computed by this site from 712 de-duplicated fan listings; see How we rank.