• Fans — 28

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Showing 1–24 of 28

How the model reads against Greenheck's data

Fan power through the fan laws, one curve per fan from a US multi-rating table

1 832 cells over 28 fans from the Models G and GB catalog, Rev 11 (August 2022); 10 withheld by name

every held cell's BHP within 2 % plus the half-hundredth it is printed to (the worst at 0.94 of that band; one cell from 0.5 BHP past a bare 2 %, the GB-100HP at 2550 rpm and 1.75 in., 2.2 % low) and its speed within 0.37 %, read back by the solver's own fan-law solve; RMS 0.39 % on power over the 1 263 cells from 0.5 BHP up. Every held BHP sits under its page's maximum-BHP law, each listing's power curve peaks at 0.97–1.01 of it at the reference speed, and every belt motor carries it within its 1.15 service factor. Withheld: four row-end cells past the fan's pressure peak and six printed slips — three GB-130 points printed under the wrong static; two GB-480 BHP figures off their own cfm: 3.66 at 393 rpm and 0.125 in., where the 360 and 415 rpm rows scaled by the fan laws give 3.96, and 3.21 at 360 rpm and 0.625 in., over the page's own law, where the fan laws read 3.12; and the GB-540's 1 250 cfm at 175 rpm and 0.125 in., where its own 0.65 BHP and the 195 rpm row put the point at about 12 400 cfm, a dropped digit

From the validation page; every row is held by a test.

Listed from published data with the source named on every entry; a listing's figures are the manufacturer's, the model that runs them is ours. Solver results never depend on who has claimed what.