Exhaust fan motor and power options for poultry houses: phase, voltage and drive
Exhaust fan motor and power options for poultry and swine houses: single-phase vs three-phase, 50 or 60 Hz, supply voltage, belt vs direct drive.
Fan type and size get most of the attention, but the motor and the power supply decide whether a fan can be connected and run reliably on your farm. This guide covers the electrical side of EcoHarvest wall exhaust fans: phase, frequency, voltage, drive and motor power. It does not repeat fan-type selection; for that, see the guide on how to choose tunnel fans.
Single-phase vs three-phase exhaust fan motors
The exhaust fans page lists motors in 1-phase or 3-phase versions. Three-phase supply is common on larger farms with many fans on one house. Single-phase may be the only option at smaller or remote sites. Tell us which supply the house actually has at the fan wall, not only what the farm has at the main board, because that is what the motor must match.
Voltage and frequency: 50 Hz or 60 Hz
Box (GPF) and Cone (GKF) fans are listed with motors for 50/60 Hz and 380, 230, 400 or 480 V, and Cone motors can also be customized. Hammer-shutter (ZHF) fans are listed at 380 V, with the motor made in China or customized. Frequency matters because a motor wound for one frequency runs at a different speed on the other, which changes airflow. State both voltage and frequency on every inquiry; the motor is then confirmed on the written quotation.
Belt drive vs direct drive
On this site, the small ZHF-400 and ZHF-480 hammer-shutter models are direct drive. The larger ZHF models and the GPF and GKF fans are belt drive, which lets a lower blade speed run from a standard motor. Belt drives need tension checks and belt replacement over time; slipping belts reduce airflow. Direct-drive fans have fewer wear parts but are listed only in the small sizes.
Motor power by fan size
Catalogue motor power rises with fan size. Examples from the exhaust fans page: Hammer-shutter models run from 180 W on the smallest to 1500 W on ZHF-1400; Box models from 750 W on GPF-36 to 1500 W on GPF-53; Cone bands from 550 W on the 1000×1000 size to 1500 W on the 1530×1530 size. These are catalogue figures; motor and airflow for your opening are confirmed on the quotation.
Motors for broiler, layer and swine houses
Fans on tunnel houses often run for long hours in hot weather, and they work against static pressure from pads and, on dark-out houses, light traps. The exhaust fans page lists double-seal bearings (dust and oil) on Box fans. For wash-down or corrosive areas, the FRP Cone housing is the listed option; ask about motor protection for your conditions on the inquiry rather than assuming one rating.
How to specify fan power on an inquiry
- Fan type and size, or the opening size
- Supply phase (1-phase or 3-phase), voltage and frequency at the fan wall
- Number of fans per house, and new build or retrofit
- Pads and light traps planned, since they change the working pressure
- Country, so local supply standards can be checked
The final motor, power and airflow for each house are set on the written quotation.