Gast Regenerative Blower 42 CFM
- 42 cfm free air capacity, though one bullet says 420
- 0.33 hp TEFC motor, 115/230 VAC
- 3.8/1.9 A at 110/220 VAC
- 1.264 psi maximum pressure, 39 inches H2O vacuum
- 1 inch NPT(F) port and thread size
- Continuous duty, up to 60 C or 140 F
- Cord and plug not included
Last refreshed Aug 4, 2026 · Based on the Amazon listing and published specifications, not hands-on testing.
A small regenerative blower for moving air at low pressure in continuous service, such as aeration, wastewater treatment and trim removal. No cord or plug is supplied, and the bullets and specs disagree on airflow.
As an Amazon Associate I earn from qualifying purchases. ProductDome earns a commission when you buy through links on this page.
ASIN: B003NUVYL8Model: R2103Category: Regenerative Blowers
Overview
Not a household fan, the Gast R2103 is a regenerative blower with a TEFC motor that moves a steady stream of air through a one inch NPT port. It can be used in any orientation to suit the system around it.
A regenerative design delivers smooth, low-pressure flow in continuous operation, which is the reason to consider it for aeration or air movement jobs. The limitation is that it is a bare blower: no cord, no plug and a conflicting airflow figure.
Who it's for
System builders who can wire the motor and plumb the one inch port will find the mounting flexibility useful. Anyone needing high pressure, or a unit ready to plug in, should look at other equipment.
Pros and cons
- Continuous duty cycle
- Any mounting orientation
- Cast iron and cast aluminum wetted parts
- Cord and plug not included
- Airflow figures conflict
- Low maximum pressure
Performance notes
A regenerative blower spins an impeller to carry air around a channel repeatedly, so it produces steady flow at modest pressure and vacuum rather than high pressure. The motor draws current according to the supply voltage, and the temperature limit governs where it can sit. The listing gives free air capacity at no back pressure.
Specifications
| Brand | Gast |
|---|---|
| Model | R2103 |
| Dimensions & fit | |
| Port size | 1 inch NPT(F) |
| Height x length x width | 9.25 x 9.375 x 8.625 inches |
| Capacity & performance | |
| Air Flow Capacity | 42 cfm |
| Maximum temperature | 60 C (140 F) |
| Cycle | Continuous |
| Power & efficiency | |
| Power Source | 115 / 230 VAC |
| Horsepower | 0.33 hp |
| Amps | 3.8/1.9 at 110/220 VAC |
| Construction & materials | |
| Material Type | Cast iron, cast aluminum |
| Warranty & support | |
| Manufacturer Warranty Description | 1 year universal guarantee |
| Other details | |
| Maximum pressure | 1.264 psi |
| Maximum vacuum | 39 inches H2O |
Closest rivals on specs
Goorui-USA Regenerative Blower 1.1 HP- Air Flow Capacity 42 vs 71 cfm (-41%)
Goorui-USA GHBH 002 12 1R5 Regenerative Blower 2.3 HP- Air Flow Capacity 42 vs 150 cfm (-72%)
Fuji Electric Regenerative Blower 2.3 HP- Air Flow Capacity 42 vs 154 cfm (-73%)
Frequently asked questions
What is in the box with the Gast R2103 blower?
The blower only. The description states that the cord and plug are not included.
How much air does the Gast R2103 move?
The specification lists a free air capacity of 42 cfm, and the title says 42 cfm. One bullet claims up to 420 cfm, which disagrees, so treat 42 cfm as the stated figure.
Can the Gast R2103 run on both 115 and 230 volts?
Yes. The title and specs list 115/230 VAC, drawing 3.8/1.9 amps at 110/220 VAC.
Is the Gast R2103 a compressor?
No. It is a regenerative blower with a maximum pressure of 1.264 psi, built for low-pressure air flow.