28" 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.

Jet-Stream Floor Fans

Often used to cool warehouse aisles and production lines, these fans generate a stream of air that travels farther than air from conventional fans.They have a totally enclosed motor enclosure, which can be used in dirty, dusty, and damp environments.

Direct-drive fans have fewer moving parts than belt-drive fans for less maintenance.

Without Wheels

Without Wheels

							Overall
Blade Dia.	Airflow, cfm	Volume	Motor Speed, rpm	No. of Speeds	Power, hp	Current, A	Ht.	Wd.	Dp.	Fan Head Movement	Housing Material	Blade Material	Guard Material		Each
120/230V AC, Single Phase—Hardwire
24"	7,800	79 dBA @ 15 ft.	1,750	1	1	12.8/6.4	28"	24"	21"	Non-Oscillating	Steel	Aluminum	Steel	000000	000000000
230/460V AC, Three Phase—Hardwire
24"	7,800	79 dBA @ 15 ft.	1,750	1	1	3.4/1.7	28"	24"	21"	Non-Oscillating	Steel	Aluminum	Steel	000000	00000000

Light Duty Direct-Drive Wall-Mount Exhaust Fans with Louvers

These light duty fans are designed for use without duct. They come complete with a movable-blade louver. The louvers are gravity operated so they open only when air flows through them, which prevents backdrafts. Direct-drive fans have fewer moving parts than belt-drive fans for less maintenance. Use these fans to draw stagnant and humid air out of a room or area. All have a totally enclosed motor enclosure, which can be used in dirty, dusty, and damp environments.

					For Opening		Overall
Blade Dia.	Airflow, cfm	Motor Speed, rpm	No. of Speeds	Power, hp	Ht.	Wd.	Ht.	Wd.	Dp.	Max. Ambient Temperature	Frame Material	Blade Material	Mount. Fasteners Included	Mount. Hole Dia.	Specifications Met		Each
230/460V AC, Three Phase—Hardwire
24"	3,950	1,720	1	1/2	24 1/2"	24 1/2"	28"	28"	17"	100° F	Steel	Aluminum	No	1/4"	UL Recognized Component	00000000	0000000

Hazardous Location Upblast Roof-Mount Exhaust Fans

With a UL-listed motor, these fans can be used in hazardous environments with combustible gases and dust to draw stagnant and humid air out through your roof, forcing it up and away from its surface.

Direct-drive fans have fewer moving parts than belt-drive fans for less maintenance.

Belt-drive fans are quieter and last longer than direct-drive fans because their components can be replaced if they’re worn or damaged.

Direct-Drive Exhaust Fans

Fans
					Overall									Mounting Bases
Blade Dia.	Airflow @ Static Pressure	Volume	Motor Speed, rpm	Power, hp	Dia.	Ht.	Base Wd.	Wt., lbs.	Max. Ambient Temp., °F	Housing Material	Environmental Rating		Each		Each
Totally Enclosed Motor Enclosure
120/240V AC, Single Phase—Hardwire
30"	5,900 cfm @ 1/2 in. of H₂O 9,350 cfm @ 0 in. of H₂O	72 dBA @ 5 ft.	1,150	1	39"	28"	42"	370	100°	Steel	NEC Class I Divisions 1, 2 Groups C, D; NEC Class II Divisions 1, 2 Groups E, F, G	0000000	000000000	0000000	0000000

Belt-Drive Exhaust Fans

Fans
					Overall									Mounting Bases
Blade Dia.	Airflow @ Static Pressure	Volume	Motor Speed, rpm	Power, hp	Dia.	Ht.	Base Wd.	Wt., lbs.	Max. Ambient Temp., °F	Housing Material	Environmental Rating		Each		Each
Totally Enclosed Motor Enclosure
120/240V AC, Single Phase—Hardwire
30"	2,950 cfm @ 1/2 in. of H₂O 9,800 cfm @ 0 in. of H₂O	68 dBA @ 5 ft.	1,750	3/4	39"	28"	42"	410	100°	Steel	NEC Class I Divisions 1, 2 Groups C, D; NEC Class II Divisions 1, 2 Groups E, F, G	0000000	000000000	0000000	0000000