Saudi Fan DH Downblast Roof Fan
Saudi Fan DH and DHW downblast centrifugal roof fans are direct-drive roof exhaust fans for clean air applications in commercial, institutional, and industrial buildings.
Saudi Fan DH / DHW downblast model range
Model summary based on the Saudi Fan DH/DHW catalog pages. Maximum CFM shown is the highest free-air or listed performance point found in the model table; final selection must confirm duty point and static pressure.
| Model | Discharge | Voltage / Frequency | Pmax | Max Listed CFM | Roof Opening | Damper Size | IP / Class | Weight |
|---|---|---|---|---|---|---|---|---|
| DH190-2E | Downblast | 230V / 60Hz / 1Ph | 0.075 kW | 357 CFM | 220x220 mm | 215x215 mm | IP44 / Class F | 5.5 kg |
| DH225-2E | Downblast | 230V / 60Hz / 1Ph | 0.21 kW | 758 CFM | 220x220 mm | 215x215 mm | IP44 / Class F | 5.5 kg |
| DH310-4E | Downblast | 230V / 60Hz / 1Ph | 0.175 kW | 1,110 CFM | 291x291 mm | 286x286 mm | IP44 / Class F | 11 kg |
| DH310-4D | Downblast | 230D/380Y / 60Hz / 3Ph | 0.24 kW | 1,148 CFM | 291x291 mm | 286x286 mm | IP54 / Class F | 11 kg |
| DH355-4E | Downblast | 230V / 60Hz / 1Ph | 0.43 kW | 1,577 CFM | 443x443 mm | 438x438 mm | IP54 / Class F | 21 kg |
| DH355-4D | Downblast | 380V / 60Hz / 3Ph | 0.32 kW | 1,537 CFM | 443x443 mm | 438x438 mm | IP54 / Class F | 21 kg |
| DH400-4E | Downblast | 230V / 60Hz / 1Ph | 0.74 kW | 2,137 CFM | 443x443 mm | 438x438 mm | IP54 / Class F | 23 kg |
| DH400-4D | Downblast | 230D/380Y / 60Hz / 3Ph | 0.66 kW | 2,319 CFM | 443x443 mm | 438x438 mm | IP54 / Class F | 23 kg |
| DH450-4E | Downblast | 230V / 60Hz / 1Ph | 1.5 kW | 3,395 CFM | 443x443 mm | 438x438 mm | IP54 / Class F | 32 kg |
| DH450-4D | Downblast | 230D/380Y / 60Hz / 3Ph | 1.2 kW | 3,395 CFM | 443x443 mm | 438x438 mm | IP54 / Class F | 32 kg |
| DHW450-4E | Downblast | 230V / 60Hz / 1Ph | 1.65 kW | 3,833 CFM | 443x443 mm | 438x438 mm | IP54 / Class F | 32 kg |
| DHW450-4D | Downblast | 230D/380Y / 60Hz / 3Ph | 1.5 kW | 4,349 CFM | 443x443 mm | 438x438 mm | IP54 / Class F | 32 kg |
| DHW500-4D | Downblast | 230D/380Y/440Y / 60Hz / 3Ph | 2.5 kW | 5,107 CFM | 443x443 mm | 438x438 mm | IP54 / Class F | 43 kg |
Downblast centrifugal roof fan for clean air exhaust
Saudi Fan DH and DHW downblast roof fans are centrifugal direct-drive roof fans for general clean air exhaust. They discharge air downward around the roof fan housing and are used where weather-protected roof exhaust is required.
The catalog positions the DH/DV series for department stores, supermarkets, factories, swimming pools, kitchens, dining halls, warehouses, garages, and farms. The fan construction uses an aluminium housing, wind band, curb cap, bird screen support, and external rotor motor.
For Saudi projects, the correct DH/DHW model should be selected by required CFM, static pressure, voltage, phase, roof opening, damper size, roof curb, and document requirements.
Key features for Saudi Fan DH downblast roof fans
The DH/DHW range is built for clean air roof exhaust where downblast discharge, direct drive efficiency, and documented fan performance are important.
Technical specifications
Final fan selection should confirm airflow, pressure, voltage, installation, accessories, and project approval requirements.
| Specification | Available Options / Details |
|---|---|
| Product Category | Roof Fan |
| Product Type | Downblast Centrifugal Roof Fan |
| Brand / Series | Saudi Fan DH / DHW |
| Installation | Roof mounted on roof curb or roof opening |
| Air Discharge | Downblast discharge |
| Drive Type | Direct drive external rotor motor |
| Motor Protection | Built-in thermal overload protection catalog reference |
| Speed Control | 100% speed controllable through suitable controller |
| Housing | Heavy gauge aluminium motor cover, shroud, curb cap, and wind band |
| Impeller | Backward curved impeller; material varies by size range |
| Protection | IP44 or IP54 depending on model |
| Max Air Temperature | 45C to 60C depending on model |
| Accessories | Roof curb, damper, speed controller, disconnecting switch, bird screen |
| Documentation | Catalog PDF, model data, quotation, submittal, and procurement documents on request |
Saudi Fan DH downblast roof fan applications
DH and DHW downblast fans are used for clean air exhaust where downward roof discharge and weather protection are required.
What to Send for Correct Selection
Send these details so the downblast roof fan can be selected against airflow, pressure, and roof opening.
Saudi Fan DH downblast roof fan accessories
Saudi Fan DH/DHW accessories can be coordinated for roof opening, backdraft control, electrical isolation, and speed balancing.
Documents and procurement files
Product and company documents can be shared for contractor, consultant, and procurement review.
Related ventilation products
Saudi Fan DH downblast roof fan questions
Common questions for contractors and procurement teams reviewing Saudi Fan DH/DHW downblast roof fans.