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.
Heater and Air Conditioner Duct Booster Fans
Insert these fans directly into your ductwork. They give small heaters and air conditioners a boost to circulate air through ductwork. The crimped end construction makes inserting the fans easy.
Note: Airflow depends on the resistance created by ductwork. This resistance, known as static pressure (SP), is measured in inches of water.
For technical drawings and 3-D models, click on a part number.
| For Duct Dia. | No. of Speeds | Airflow @ Static Pressure | Volume | Motor Speed, rpm | Overall Dp. | Max. Temp., °F | Housing Material | Blade Material | Each | |
120V AC, Single Phase—Plug | ||||||||||
|---|---|---|---|---|---|---|---|---|---|---|
| 4" | 1 | 65 cfm @ 0 in. of H₂O | 47 dBA | 3,200 | 6" | 140° | Galvanized Steel | Polycarbonate Plastic | 0000000 | 000000 |
DC Heater and Air Conditioner Duct Booster Fans
Often used in vehicles, these fans operate on DC power. Insert them directly into your ductwork. They give small heaters and air conditioners a boost to circulate air through ductwork. All 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 | Ht. | Wd. | Dp. | Max. Temp., °F | Housing Material | Blade Material | Mounting Fasteners Included | Mounting Hole Dia. | Each | |
12V DC—Hardwire | ||||||||||||
| 4" | 230 cfm @ 0 in. of H₂O | 69 dBA @ 15 ft. | 4 3/16" | 6" | 5 1/4" | 200° | Polypropylene Plastic | Polypropylene Plastic | No | 3/16" | 00000000 | 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, rpm | 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 | 3,050 | 1/40 | 9 1/2" | 9 1/2" | 9 5/8" | 140° | ABS/Polycarbonate Plastic | Nylon Plastic | C-UL Listed, UL Listed | Yes | 1/4" | 00000000 | 0000000 |
| 4" | 143 cfm @ 3/8 in. of H₂O 168 cfm @ 1/8 in. of H₂O | 2,450 | 1/9 | 10" | 10 1/2" | 10 9/16" | 140° | ABS/Polycarbonate Plastic | Nylon Plastic | C-UL Listed, UL Listed | Yes | 1/4" | 000000000 | 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 |
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 |