Down Drafts | McMaster-Carr

Pull metal particles from grinding, cutting, and finishing workpieces out of the air to avoid breathing them and creating sparks in your work area. Blowers draw particles into these tables through holes in the surface. Once inside, the particles are captured with filters, and clean air is released back into your space. These tables are best for jobs that create large particles. You shouldn’t use them with fine powders, such as dust from sanding aluminum, titanium, and steel. The filters are made of aluminum, which means they won't spark if metal particles hit them.

Vertical shields on the sides of these tables help protect you from flying debris. They’re removable, so you can make space for large workpieces. The removable trays at the bottom of these tables catch large chips and scraps, making them easy to clean up.

	Downdraft Tables															Replacement Filters
						Overall			Opening
	Airflow, ft³/min	Power, hp	Current, amp	Volume (Sound), dBA	Removes Particle Size Down To, μm	Ht.	Wd.	Dp.	Lg.	Wd.	Overall Wt. Cap., lb.	Features	Includes		Each		Each
Powder-Coated Steel Frame with Stainless Steel Top







				120V AC, 60 Hz—Hardwire

				1,790	1/2	6	78	250	34 3/4"	65 3/4"	24 3/4"	2"	7/8"	440	Removable Side Shields, Removable Tray	Four 250 Micron Fireproof Filters	6978N112	000000000	6978N113	0000000

Belt-Drive Downdraft Roof-Mount Exhaust Fans

Belt-drive fans are quieter and have a longer life span than direct-drive fans because components can be replaced if worn or damaged. More economical than upblast roof-mount exhaust fans, these draw stagnant and humid air out through your roof and then direct it back toward the roof.

Note: Airflow depends on the resistance created by ductwork. This resistance, known as static pressure (SP), is measured in inches of water.

120V AC/208 to 230V AC, Single Phase (Hardwire)—Open Dripproof (ODP) Motor Enclosure

Image of Product. Front orientation. Exhaust Fans. Belt-Drive Downdraft Roof-Mount Exhaust Fans .

Exhaust Fans															Mounting Bases
							Overall
Blade Dia.	Airflow @ SP	Volume (Sound) @ Distance	Drive Type	Motor Speed, rpm	No. of Speeds	Power, hp	Dia.	Ht.	Base Wd.	Housing Material	Blade Material	Features		Each		Each
16"	2,800 ft³/min @ 1/2 in. H₂O 3,200 ft³/min @ 0 in. H₂O	70 dBA @ 5 ft.	Belt	1,145	1	3/4	33 11/16"	29 1/4"	26"	Aluminum	Aluminum	Bird Screen	2207K31	000000000	2230K34	0000000
20"	4,900 ft³/min @ 1/2 in. H₂O 5,400 ft³/min @ 0 in. H₂O	74 dBA @ 5 ft.	Belt	1,080	1	1 1/2	38 1/4"	31 3/4"	30"	Aluminum	Aluminum	Bird Screen	2207K32	00000000	2230K36	000000

208 to 230V AC/460V AC, Three Phase (Hardwire)—Open Dripproof (ODP) Motor Enclosure

Exhaust Fans															Mounting Bases
							Overall
Blade Dia.	Airflow @ SP	Volume (Sound) @ Distance	Drive Type	Motor Speed, rpm	No. of Speeds	Power, hp	Dia.	Ht.	Base Wd.	Housing Material	Blade Material	Features		Each		Each
24"	6,900 ft³/min @ 1/2 in. H₂O 7,750 ft³/min @ 0 in. H₂O	73 dBA @ 5 ft.	Belt	875	1	2	44 1/4"	39 11/16"	33"	Aluminum	Aluminum	Bird Screen	2207K33	000000000	2230K39	0000000

Downdraft Tables for Woodworking


	Replacement Filters

Keep large particles out of the air while cutting and routing wood products. Air blowers pull particles into the table through holes in the surface, making sure you don't breathe them. Tables have a blower on each side for even suction across the table surface. Inside the table, filters remove the particles, and exhaust vents release clean air back into your shop.

These tables should only be used with wood, plastic composites, and other non-combustible materials. Do not use them to filter materials that may create sparks, such as metallic dust. They are not designed to filter liquids, exhaust fumes, or smoke.

Rubber grommets built into the surface help keep your workpiece from slipping. The removable tray catches large chips and scraps that fall to the bottom of the table, making them easy to clean up. These tables have side shields to protect you from flying debris, which fold down if you need to make space for large workpieces. When doing precision work, use the removable plugs to block holes in the tabletop so small parts don't fall through.

	Downdraft Tables														Replacement 0.3 Micron Filters		Replacement 1 Micron Filters
						Overall
	Airflow, ft³/min	Power, hp	Current, amp	Volume (Sound), dBA	Removes Particle Size Down To, μm	Ht.	Wd.	Dp.	Opening Dia.	Overall Wt. Cap., lb.	Features	Includes		Each		Each		Each
Powder-Coated Steel Frame and Top







				110V AC, 60 Hz—Hardwire

				2,874	1	12	68	1	39 3/4"	78 3/4"	27 3/4"	3/4", 1 1/8"	880	Antislip Rubber Grommets, Removable Side Shields, Removable Tray	Removable Plugs, Two 0.3 Micron Filters, Two 1 Micron Filters	7125N222	000000000	7125N226	000000	7125N225	000000

Duct Downdraft Diverters

Prevent downdrafts from blowing back into ductwork. An internal cone blocks outside air while allowing air and fumes to vent from your system.

Galvanized Steel—Strong and corrosion resistant, galvanized steel is the most commonly used ductwork material.

			Overall			Galvanized Steel
Duct Size	ID	OD	Dia.	Ht.	Ga.		Each
3	3"	2 7/8"	5 1/2"	9 1/2"	26	1785K11	000000
4	4"	3 7/8"	7 1/4"	11 1/2"	26	1785K12	00000
5	5"	4 7/8"	9 1/4"	13 1/8"	26	1785K13	00000
6	6"	5 7/8"	11 1/2"	14"	26	1785K14	00000
7	7"	6 7/8"	14"	16"	26	1785K15	00000
8	8"	7 7/8"	15 1/2"	17 3/4"	26	1785K16	000000
10	10"	9 7/8"	19 3/4"	20 3/4"	24	1785K18	000000
12	12"	11 7/8"	25 1/2"	24 1/2"	24	1785K19	000000

Direct-Drive Downdraft Roof-Mount Exhaust Fans


Style 1	Style 2

Style 3

Direct-drive fans have fewer moving parts than belt-drive fans for less maintenance. More economical than upblast roof-mount exhaust fans, these draw stagnant and humid air out through your roof and then direct it back toward the roof. All fans have a disconnect switch to turn off the power for servicing.

Note: Airflow depends on the resistance created by ductwork. This resistance, known as static pressure (SP), is measured in inches of water.

Brushless Motor—Fans with a brushless motor are more efficient than fans with a standard motor. They operate at a wide range of speeds for precise speed control and greater energy savings. They’re also quieter and have a longer lifespan because of their advanced electronic controls.

	Exhaust Fans															Mounting Bases
							Overall
	Style	Blade Dia.	Airflow @ SP	Volume (Sound) @ Distance	Motor Speed, rpm	Power, hp	Dia.	Ht.	Base Wd.	Wt., lb.	Ambient Temp., ° F	Housing Material	Certification		Each		Each
Open Dripproof (ODP) Motor Enclosure







				120V AC, Single Phase—Hardwire

				1	9"	100 ft³/min @ 1/2 in. H₂O 400 ft³/min @ 0 in. H₂O	50 dBA @ 5 ft.	1,250	1/32	20 3/4"	14 1/2"	19"	40	120	Aluminum	AMCA Certified, ETL Listed	2011K21	0000000	2230K11	0000000


				1	11"	600 ft³/min @ 1/2 in. H₂O 800 ft³/min @ 0 in. H₂O	57 dBA @ 5 ft.	1,625	3/16	23 3/4"	16 1/4"	19"	37	Not Rated	Aluminum	AMCA Certified, ETL Listed	2011K54	000000	2230K11	000000
				1	12"	950 ft³/min @ 1/2 in. H₂O 1,250 ft³/min @ 0 in. H₂O	62 dBA @ 5 ft.	1,625	1/4	26 1/4"	19 1/8"	21"	53	Not Rated	Aluminum	AMCA Certified, ETL Listed	2011K65	000000	2230K13	000000
				1	14"	1,800 ft³/min @ 1/2 in. H₂O 2,100 ft³/min @ 0 in. H₂O	66 dBA @ 5 ft.	1,625	1/2	29 3/4"	21 3/4"	21"	56	Not Rated	Aluminum	AMCA Certified, ETL Listed	2011K57	000000	2230K13	000000
				1	16"	2,600 ft³/min @ 1/2 in. H₂O 3,100 ft³/min @ 0 in. H₂O	70 dBA @ 5 ft.	1,450	3/4	33 1/4"	23 3/8"	24"	77	120	Aluminum	AMCA Certified, ETL Listed	2011K22	000000	2230K34	000000




						208/230V AC Three Phase—Hardwire

						2	19"	4,500 ft³/min @ 1/2 in. H₂O 5,000 ft³/min @ 0 in. H₂O	75 dBA @ 5 ft.	1,300	2	38 15/16"	32 3/4"	28"	189	120	Aluminum	AMCA Certified, ETL Listed	2011K23	00000000	2230K35	000000


						2	21"	6,200 ft³/min @ 1/2 in. H₂O 6,700 ft³/min @ 0 in. H₂O	82 dBA @ 5 ft.	1,400	5	38 15/16"	32 1/4"	28"	201	120	Aluminum	AMCA Certified, ETL Listed	2011K24	00000000	2230K35	000000
						2	24"	8,100 ft³/min @ 1/2 in. H₂O 9,000 ft³/min @ 0 in. H₂O	73 dBA @ 5 ft.	925	3	43 7/16"	37 1/4"	33"	288	120	Aluminum	AMCA Certified, ETL Listed	2011K25	00000000	2230K39	000000
						2	30"	10,400 ft³/min @ 1/2 in. H₂O 11,500 ft³/min @ 0 in. H₂O	69 dBA @ 5 ft.	700	5	52 13/16"	44"	40"	467	120	Aluminum	AMCA Certified, ETL Listed	2011K26	00000000	2230K94	000000
						2	36"	11,000 ft³/min @ 1/2 in. H₂O 13,500 ft³/min @ 0 in. H₂O	64 dBA @ 5 ft.	450	5	63 5/16"	49 1/2"	44"	532	120	Aluminum	AMCA Certified, ETL Listed	2011K27	00000000	2230K57	000000


						Totally Enclosed Motor Enclosure







										120V AC, Single Phase—Hardwire

										3	10"	60 ft³/min @ 1/2 in. H₂O 500 ft³/min @ 0 in. H₂O	Not Rated	1,500	1/30	18 5/16"	11 1/4"	19"	21	Not Rated	Aluminum	AMCA Certified, ETL Listed	2050K21	000000	2230K11	000000


										3	12"	430 ft³/min @ 1/2 in. H₂O 830 ft³/min @ 0 in. H₂O	Not Rated	1,500	1/10	20 5/16"	11 3/4"	19"	30	Not Rated	Aluminum	AMCA Certified, ETL Listed	2050K22	000000	2230K11	000000
										3	14"	520 ft³/min @ 1/2 in. H₂O 1,100 ft³/min @ 0 in. H₂O	Not Rated	1,100	1/6	27 5/16"	14 5/8"	21"	39	Not Rated	Aluminum	AMCA Certified, ETL Listed	2050K13	000000	2230K13	000000
										3	18"	1,200 ft³/min @ 1/2 in. H₂O 2,400 ft³/min @ 0 in. H₂O	Not Rated	1,100	1/3	33 9/16"	16 3/8"	26"	60	Not Rated	Aluminum	AMCA Certified, ETL Listed	2050K16	000000	2230K16	000000


										Totally Enclosed Motor Enclosure—Brushless Motor







														120V AC, Single Phase—Hardwire

														1	12"	1,000 ft³/min @ 1/2 in. H₂O 1,300 ft³/min @ 0 in. H₂O	66 dBA @ 5 ft.	1,575	1/3	26 1/4"	19 1/8"	21"	54	120	Aluminum	AMCA Certified, ETL Listed	2050K33	000000	2230K31	000000


														1	14"	1,900 ft³/min @ 1/2 in. H₂O 2,300 ft³/min @ 0 in. H₂O	68 dBA @ 5 ft.	1,525	1/2	29 3/4"	21 3/4"	21"	61	120	Aluminum	AMCA Certified, ETL Listed	2050K34	00000000	2230K31	000000
														1	16"	2,850 ft³/min @ 1/2 in. H₂O 3,300 ft³/min @ 0 in. H₂O	71 dBA @ 5 ft.	1,525	1	33 1/4"	23 3/8"	24"	74	120	Aluminum	AMCA Certified, ETL Listed	2050K35	00000000	2230K34	000000