11 1/4" Fans | McMaster-Carr

Create a more concentrated stream of air than enclosure-cooling fans to cool equipment faster. To save space inside enclosures, these blowers can mount outside. They draw cooler outside air into your enclosure or exhaust hot air through a louvered outlet vent. Incoming air is filtered to keep out dust and contaminants.

155 ft³/min Airflow—155 cfm blowers have a totally enclosed motor enclosure for use in dirty, dusty, and wet environments.

Replacement Filters—Replacement filters are sold separately.

	Blowers											Replacement Prefilters		Replacement Filters
	Overall			Outlet
	Ht.	Wd.	Dp.	Ht.	Wd.	Airflow, ft³/min	Volume (Sound), dBA	Motor Speed, rpm	Current, amp		Each		Each		Each
Round







				120V AC, Single Phase, 60 Hz—Wire Leads

				11 1/4"	7 3/4"	7"	4 3/8"	3 7/8"	155	70	2,350	0.7	1730K12	0000000	1730K23	000000	1730K24	0000000

Direct-Drive Downdraft Roof-Mount Exhaust Fans

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.

	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.	Housing Material	Certification		Each		Each
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	0000000	2230K11	0000000