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Kitchen CFM Exhaust Fan Requirements

To use the table, look at ceiling height and then cross to room width and then room length.

Cathedral ceilings provide more cubic space to the room. If the ceiling at its lowest point is 8 feet and at its highest point is 10 feet that would equate to a 2 foot variation. If the ceiling at its lowest point is 8 feet and at its highest point is 12 feet that would equate to a 4 foot variation.

The CFM on the table is a calculated amount and in most cases you will not be able to find an exhaust fan that has the exact CFM value. Treat these values as minimums and purchase the exhaust fan with the closest CFM rating above the number in this table.

This table must be used in conjunction with the EDL calculation and graph.

Table 1 - Kitchen Exhaust Fan Requirements
Kitchen Size (Feet) CFM Of Kitchen Exhaust Fan

Height

Width

Length

Flat Ceiling

Cathedral Ceiling

2' Variation

4' Variation

8

8

10

160

200

240

11

176

220

264

12

192

240

288

13

208

260

312

14

224

280

336

9

10

180

225

270

11

198

248

297

12

216

270

324

13

234

293

351

14

252

315

378

10

10

200

250

300

11

220

275

330

12

240

300

360

13

260

325

390

14

280

350

420

11

10

220

275

330

11

242

303

363

12

264

330

396

13

286

358

429

14

308

385

462

12

10

240

300

360

11

264

330

396

12

288

360

432

13

312

390

468

14

336

420

504

 

 

Table 1 - Kitchen Exhaust Fan Requirements
Kitchen Size (Feet) CFM Of Kitchen Exhaust Fan

Height

Width

Length

Flat Ceiling

Cathedral Ceiling

2' Variation

4' Variation

9

8

10

180

225

270

11

198

248

297

12

216

270

324

13

234

293

351

14

252

315

378

9

10

203

254

304

11

223

278

334

12

243

304

365

13

263

329

395

14

284

354

425

10

10

225

281

338

11

248

309

371

12

270

338

405

13

293

366

439

14

315

394

473

11

10

248

309

371

11

272

340

408

12

297

371

446

13

322

402

483

14

347

433

520

12

10

270

338

405

11

297

371

446

12

324

405

486

13

351

439

527

14

378

473

567

Back to Kitchen Exhaust Fan Makeup Air - Part 1 Part 2

Back to Kitchen Exhaust Fan Performance Graph