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.	Temp. Range, °F	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)	-20° to 140°	28	62	1,900	0.2	0000000	000000
7.09" (180 mm)	7.09" (180 mm)	1.6" (40.64 mm)	-20° to 155°	55	60	2,750	0.2	0000000	00000
8.66" (220 mm)	8.66" (220 mm)	2.2" (55.88 mm)	-20° to 155°	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)	-20° to 165°	32	55	2,200	0.5	0000000	00000
7.09" (180 mm)	7.09" (180 mm)	1.6" (40.64 mm)	-20° to 165°	52	58	2,550	0.4	0000000	00000
8.66" (220 mm)	8.66" (220 mm)	2.2" (55.88 mm)	0° to 140°	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)	-20° to 165°	32	55	2,200	0.2	0000000	00000
7.09" (180 mm)	7.09" (180 mm)	1.6" (40.64 mm)	-20° to 165°	52	58	2,550	0.2	0000000	00000
8.66" (220 mm)	8.66" (220 mm)	2.2" (55.88 mm)	0° to 140°	120	66	2,850	0.8	0000000	000000

Round

Overall
Dia.	Dp.	Airflow, cfm	Temp. Range, °F	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	-10° to 145°	60	2,450	0.7	00000000	0000000
8.66" (220 mm)	2.8" (71.12 mm)	530	-10° to 85°	74	2,700	0.4	00000000	000000
120V AC, Single Phase, 60Hz—Wire Leads
5.24" (133 mm)	3.6" (91.44 mm)	200	-10° to 100°	66	3,250	0.3	00000000	000000
230V AC, Single Phase, 60Hz—Wire Leads
8.66" (220 mm)	2.8" (71.12 mm)	530	-10° to 100°	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							Mounting
For Duct Dia.	Airflow @ Static Pressure	Motor Speed	Power, hp	Dia.	Ht.	Dp.	Max. Temp., °F	Housing Material	Blade Material	Specifications Met	Hardware Included	Hole Diameter		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	Yes	0.244"	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	Yes	0.244"	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	Yes	0.244"	00000000	000000