Rosewill 4 inch Centrifugal Blower 117 CFM 20 W 110 V 2800 rpm
A 4-inch centrifugal blower moves 117 CFM at 2800 rpm using 20 W on 110 V and includes a spring-loaded backdraft damper
- TypeCentrifugal Blowers
- Horsepower20
- ColorBlack
- Watts20 watts
- Voltage220V
- Amps20
- 117 CFM airflow from 20 W motor
- 2800 rpm all-copper ball-bearing motor runs quietly
- Spring-loaded check valve blocks back-draft automatically
- 2 m power cord and mounting hardware included
- 500 g metal housing fits 5.23 in panel cutout
4 inch Centrifugal Blower for residential
The Rosewill 4 inch centrifugal blower moves 117 CFM at 2800 rpm while drawing 20 watts. It is built with a metal housing and an all-copper motor for continuous exhaust duty in bathrooms, kitchens, garages or grow tents. The integrated backdraft damper opens under airflow and closes by spring when the fan stops. The unit ships with a 1.2 m power cord, mounting screws, tape and a separate switch.
Verify voltage and duct match before wiring
Confirm the supply is 110 V AC; the specifications also list a 220 V rating but the supplied cord and switch are intended for 110 V use. The duct connection is 4 inch (approximately 5.23 inch panel cutout) so ensure your existing opening matches. No plug is fitted — the cord must be terminated to a suitable circuit or the included switch. Allow space for the metal housing depth behind the mounting surface.
Metal construction and ball-bearing motor sustain
The heavy-gauge metal casing resists deformation during long run cycles and the ball-bearing copper motor maintains 117 CFM without the speed drop common in sleeve-bearing units. The spring-loaded check valve prevents reverse airflow when the blower is off, keeping conditioned air inside. Continuous operation at 20 watts produces steady exhaust pressure rather than a short-burst peak.
Highlights
- 117 CFM airflow from 20 W motor
- 2800 rpm all-copper ball-bearing motor runs quietly
- Spring-loaded check valve blocks back-draft automatically
- 2 m power cord and mounting hardware included
- 500 g metal housing fits 5.23 in panel cutout
Specifications
| Type | Centrifugal Blowers |
|---|---|
| Brand | Rosewill |
| Horsepower | 20 |
| Color | Black |
| Watts | 20 watts |
| Voltage | 220V |
| Amps | 20 |
| Power Cord Length | false, meters |
| RPM | 2800 rpm |
| Part Number | no |
Questions about this item
What comes in the box and what must I supply myself?
The package includes a switch, mounting tape, four screws and a 1.2 m power cord; you will need to fit your own mains plug to the cord before use.
The specs list both 110 V and 220 V — which one should I wire it for?
The fan is rated for 110 V operation; the 220 V figure appears in the general data but the product highlights specify 110 V safe use.
What does 117 CFM mean for a 4 inch duct in a real room?
It delivers roughly 117 cubic feet of air per minute through a 4 inch duct, enough to clear cooking odours or moisture from a typical bathroom or kitchen.
Also in this aisle
People compared these
Same shelf, same checkout — eight coins and a 30-minute rate lock.
