Centrifugal Fans | McMaster-Carr

Measured in decibels (dB), volume ratings indicate how much noise equipment makes. Some common volume levels include a whisper @ 20 dB, a refrigerator @ 40 dB, a conversation @ 60 dB, and a light machine shop @ 90 dB. OSHA recommends hearing protection for exposure to 80 dB and greater.

Edge-Flow Equipment-Cooling Blowers

For use in tight spaces where other equipment-cooling blowers won't fit, air enters through the center of these blowers and then expels along the edges. They create a more concentrated stream of air than equipment-cooling fans to blow away the heat generated by electronic equipment, induction heaters, and high-wattage bulbs. Use them to keep heat-sensitive equipment such as electronic components cool.

Square blowers have UL recognized components and are CSA certified.

Round blowers are also known as motorized impellers.

For technical drawings and 3-D models, click on a part number.

Square

Overall
Ht.	Wd.	Dp.	Airflow, cfm	Volume, dB	Motor Speed, rpm	Current, A		Each
120V AC, Single Phase, 60Hz—Wire Leads
5.31" (135 mm)	5.31" (135 mm)	1.5" (38.1 mm)	28	62	1,900	0.2	0000000	000000
7.09" (180 mm)	7.09" (180 mm)	1.6" (40.64 mm)	55	60	2,750	0.2	0000000	00000
8.66" (220 mm)	8.66" (220 mm)	2.2" (55.88 mm)	130	62	3,050	0.4	0000000	000000
12V DC—Wire Leads
5.31" (135 mm)	5.31" (135 mm)	1.5" (38.1 mm)	32	55	2,200	0.5	0000000	00000
7.09" (180 mm)	7.09" (180 mm)	1.6" (40.64 mm)	52	58	2,550	0.4	0000000	00000
8.66" (220 mm)	8.66" (220 mm)	2.2" (55.88 mm)	120	66	2,850	1.8	0000000	000000
24V DC—Wire Leads
5.31" (135 mm)	5.31" (135 mm)	1.5" (38.1 mm)	32	55	2,200	0.2	0000000	00000
7.09" (180 mm)	7.09" (180 mm)	1.6" (40.64 mm)	52	58	2,550	0.2	0000000	00000
8.66" (220 mm)	8.66" (220 mm)	2.2" (55.88 mm)	120	66	2,850	0.8	0000000	000000

Round

Overall
Dia.	Dp.	Airflow, cfm	Volume, dB	Motor Speed, rpm	Current, A		Each
120V AC, Single Phase, 50Hz/60Hz—Wire Leads
7.48" (190 mm)	2.7" (68.5 mm)	305	60	2,450	0.7	00000000	0000000
8.66" (220 mm)	2.8" (71.12 mm)	530	74	2,700	0.4	00000000	000000
120V AC, Single Phase, 60Hz—Wire Leads
5.24" (133 mm)	3.6" (91.44 mm)	200	66	3,250	0.3	00000000	000000
230V AC, Single Phase, 60Hz—Wire Leads
8.66" (220 mm)	2.8" (71.12 mm)	530	74	2,700	0.9	00000000	000000

Direct-Drive Corrosion-Resistant Duct Fans

A galvanized steel housing offers good corrosion resistance. All of these direct-drive fans have fewer moving parts than belt-drive fans for less maintenance. Also known as axial duct fans, they install inline in ductwork for use as an exhaust, supply, or booster fan. The fans have a totally enclosed motor enclosure, which can be used in dirty, dusty, and damp environments.

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

				Overall
For Duct Dia.	Airflow @ Static Pressure	Motor Speed, rpm	Power, hp	Dia.	Ht.	Dp.	Max. Temp., °F	Housing Material	Blade Material	Specifications Met		Each
120V AC, Single Phase—Hardwire
4"	90 cfm @ 3/8 in. of H₂O 115 cfm @ 1/8 in. of H₂O	3,000	1/40	8 3/4"	10 3/4"	6 1/2"	140°	Galvanized Steel	Polypropylene Plastic	C-UL Listed, UL Listed	0000000	0000000
5"	105 cfm @ 3/8 in. of H₂O 135 cfm @ 1/8 in. of H₂O	3,000	1/40	8 3/4"	10 3/4"	5 1/2"	140°	Galvanized Steel	Polypropylene Plastic	C-UL Listed, UL Listed	0000000	000000
6"	240 cfm @ 3/8 in. of H₂O 280 cfm @ 1/8 in. of H₂O	2,700	1/10	11 3/8"	13 3/8"	6"	140°	Galvanized Steel	Polypropylene Plastic	C-UL Listed, UL Listed	0000000	000000
8"	360 cfm @ 3/8 in. of H₂O 425 cfm @ 1/8 in. of H₂O	2,550	1/6	13 3/8"	15 3/8"	6"	140°	Galvanized Steel	Polypropylene Plastic	C-UL Listed, UL Listed	0000000	000000
8"	435 cfm @ 3/8 in. of H₂O 480 cfm @ 1/8 in. of H₂O	2,950	1/5	13 3/8"	15 3/8"	6"	140°	Galvanized Steel	Polypropylene Plastic	C-UL Listed, UL Listed	0000000	000000
10"	540 cfm @ 3/8 in. of H₂O 570 cfm @ 1/8 in. of H₂O	3,100	1/4	13 3/8"	15 3/8"	5 7/8"	140°	Galvanized Steel	Polypropylene Plastic	C-UL Listed, UL Listed	0000000	000000
12"	620 cfm @ 3/8 in. of H₂O 700 cfm @ 1/8 in. of H₂O	2,600	1/4	16"	18"	8 1/4"	140°	Galvanized Steel	Polypropylene Plastic	C-UL Listed, UL Listed	0000000	000000
120V AC, Single Phase—Plug
4"	90 cfm @ 3/8 in. of H₂O 115 cfm @ 1/8 in. of H₂O	3,000	1/40	8 3/4"	10 3/4"	6 1/2"	140°	Galvanized Steel	Polypropylene Plastic	C-UL Listed, UL Listed	0000000	000000
5"	105 cfm @ 3/8 in. of H₂O 135 cfm @ 1/8 in. of H₂O	3,000	1/40	8 3/4"	10 3/4"	5 1/2"	140°	Galvanized Steel	Polypropylene Plastic	C-UL Listed, UL Listed	0000000	000000
6"	240 cfm @ 3/8 in. of H₂O 280 cfm @ 1/8 in. of H₂O	2,700	1/10	11 3/8"	13 3/8"	6"	140°	Galvanized Steel	Polypropylene Plastic	C-UL Listed, UL Listed	0000000	000000
8"	360 cfm @ 3/8 in. of H₂O 425 cfm @ 1/8 in. of H₂O	2,550	1/6	13 3/8"	15 3/8"	6"	140°	Galvanized Steel	Polypropylene Plastic	C-UL Listed, UL Listed	0000000	000000
8"	435 cfm @ 3/8 in. of H₂O 480 cfm @ 1/8 in. of H₂O	2,950	1/5	13 3/8"	15 3/8"	6"	140°	Galvanized Steel	Polypropylene Plastic	C-UL Listed, UL Listed	0000000	000000
10"	540 cfm @ 3/8 in. of H₂O 570 cfm @ 1/8 in. of H₂O	3,100	1/4	13 3/8"	15 3/8"	5 7/8"	140°	Galvanized Steel	Polypropylene Plastic	C-UL Listed, UL Listed	0000000	000000
12"	620 cfm @ 3/8 in. of H₂O 700 cfm @ 1/8 in. of H₂O	2,600	1/4	16"	18"	8 1/4"	140°	Galvanized Steel	Polypropylene Plastic	C-UL Listed, UL Listed	0000000	000000

Direct-Drive Duct Fans

Direct-drive fans have fewer moving parts than belt-drive fans for less maintenance. Also known as axial duct fans, these install inline in ductwork for use as an exhaust, supply, or booster fan. All fans have a totally enclosed motor enclosure, which can be used in dirty, dusty, and damp environments.

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

				Overall
For Duct Dia.	Airflow @ Static Pressure	Motor Speed	Power, hp	Dia.	Ht.	Dp.	Max. Temp., °F	Housing Material	Blade Material	Specifications Met		Each
120V AC, Single Phase—Hardwire
4"	95 cfm @ 3/8 in. of H₂O 135 cfm @ 1/8 in. of H₂O	Not Rated	1/40	9 1/2"	9 1/2"	9 5/8"	140°	ABS/Polycarbonate Plastic	ABS/Polycarbonate Plastic	C-UL Listed, UL Listed	00000000	0000000
5"	105 cfm @ 3/8 in. of H₂O 150 cfm @ 1/8 in. of H₂O	Not Rated	1/40	9 1/2"	9 1/2"	7 7/8"	140°	ABS/Polycarbonate Plastic	ABS/Polycarbonate Plastic	C-UL Listed, UL Listed	00000000	000000
6"	250 cfm @ 3/8 in. of H₂O 300 cfm @ 1/8 in. of H₂O	Not Rated	1/10	11 3/4"	11 3/4"	9 5/8"	140°	ABS/Polycarbonate Plastic	ABS/Polycarbonate Plastic	C-UL Listed, UL Listed	00000000	000000

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