About Sound Levels
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.
High-Output Direct-Drive Duct Fans
Produce three times the airflow as standard direct-drive duct fans. 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. All have a TEFC (totally enclosed fan cooled) 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 | Volume | Motor Speed, rpm | Power, hp | Dia. | Ht. | Dp. | Bolt Circle Dia. | Max. Temp., °F | Housing Material | Blade Material | Fasteners Included | For Screw Size  | Hole Dia. | No. of Holes | Each | |
120/230V AC, Single Phase—Hardwire | |||||||||||||||||
| 24" | 4,900 cfm @ 3/8 in. of H₂O 5,800 cfm @ 1/8 in. of H₂O | 65 dBA @ 15 ft. | 1,750 | 3/4 | 26 11/16" | 26 11/16" | 21" | 25 13/16" | 100° | Steel | Aluminum | No | 3/8" | 7/16" | 8 | 0000000 | 000000000 |
230/460V AC, Three Phase—Hardwire | |||||||||||||||||
| 24" | 4,900 cfm @ 3/8 in. of H₂O 5,800 cfm @ 1/8 in. of H₂O | 65 dBA @ 15 ft. | 1,750 | 3/4 | 26 11/16" | 26 11/16" | 21" | 25 13/16" | 100° | Steel | Aluminum | No | 3/8" | 7/16" | 8 | 0000000 | 00000000 |
Belt-Drive Duct 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. 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 | Volume | Motor Speed, rpm | Power, hp | Dia. | Ht. | Dp. | Max. Temp., °F | Housing Material | Blade Material | Mounting Fasteners Included | Mounting Hole Dia. | Each | |
230/460V AC, Three Phase—Hardwire | ||||||||||||||
| 24" | 7,000 cfm @ 3/8 in. of H₂O 7,900 cfm @ 1/8 in. of H₂O | 70 dBA @ 15 ft. | 1,800 | 1 1/2 | 26 11/16" | 36 11/16" | 12" | 175° | Steel | Aluminum | No | 7/16" | 0000000 | 000000000 |
Belt-Drive Corrosion-Resistant Duct Fans
A 304 stainless steel housing offers good corrosion resistance. All of these belt-drive fans are quieter and have a longer life span than direct-drive fans because components can be replaced if worn or damaged. 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 | Volume | Motor Speed, rpm | Power, hp | Dia. | Ht. | Dp. | Max. Temp., °F | Housing Material | Blade Material | Mounting Fasteners Included | Mounting Hole Dia. | Each | |
230/460V AC, Three Phase—Hardwire | ||||||||||||||
| 24" | 7,200 cfm @ 3/8 in. of H₂O 7,900 cfm @ 1/8 in. of H₂O | 65 dBA @ 15 ft. | 1,700 | 2 | 26 11/16" | 38 3/4" | 21" | 200° | 304 Stainless Steel | Stainless Steel | No | 7/16" | 0000000 | 000000000 |
Direct-Drive Hazardous Location Duct Fans
These fans have an explosion-proof motor that is UL listed for Class I, Divisions 1 and 2, Group D; and Class II, Divisions 1 and 2, Groups F and G hazardous environments. All are direct-drive fans that 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 TEFC (totally enclosed fan cooled) 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 | Volume | Motor Speed, rpm | Power, hp | Dia. | Ht. | Dp. | Max.Temp., °F | Housing Material | Blade Material | Mounting Fasteners Included | Mounting Hole Dia. | Each | |
120/230V AC, Single Phase—Hardwire | ||||||||||||||
| 24" | 4,900 cfm @ 3/8 in. of H₂O 5,800 cfm @ 1/8 in. of H₂O | 65 dBA @ 15 ft. | 1,750 | 3/4 | 26 11/16" | 26 11/16" | 21" | 100° | Steel | Aluminum | No | 7/16" | 0000000 | 000000000 |
230/460V AC, Three Phase—Hardwire | ||||||||||||||
| 24" | 4,900 cfm @ 3/8 in. of H₂O 5,800 cfm @ 1/8 in. of H₂O | 65 dBA @ 15 ft. | 1,750 | 3/4 | 26 11/16" | 26 11/16" | 21" | 100° | Steel | Aluminum | No | 7/16" | 0000000 | 00000000 |
Belt-Drive Hazardous Location Duct Fans
These fans have an explosion-proof motor that is rated for hazardous environments. All are belt-drive fans that are quieter and have a longer life span than direct-drive fans because components can be replaced if worn or damaged. They install inline in ductwork for use as an exhaust, supply, or booster fan. Fans rated IP56 have a motor enclosure that’s rated for protection in damp, dusty, and washdown environments. UL and CSA standards apply to the motor.
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 | Volume | Motor Speed, rpm | Power, hp | Dia. | Ht. | Dp. | Max. Temp., °F | Housing Material | Blade Material | Mount. Fasteners Included | Mount. Hole Dia. | Each | |
230/460V AC, Three Phase—Hardwire | ||||||||||||||
| 24" | 7,000 cfm @ 3/8 in. of H₂O 7,900 cfm @ 1/8 in. of H₂O | 70 dBA @ 15 ft. | 1,800 | 1 1/2 | 26 11/16" | 36 11/16" | 12" | 175° | Steel | Aluminum | No | 7/16" | 0000000 | 000000000 |