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Compact air fan with 750 m³/h for construction drying, water damage, ventilation, and air extraction
The Master BL 4800 is a compact and powerful professional fan for construction drying, water damage restoration, ventilation, and air extraction. With an air capacity of 750 m³/h, a maximum pressure of 245 Pa, and a power consumption of only 250 W, the fan is excellently suited for construction sites, trade, industry, warehouses, and remediation work.
The Master BL 4800 fan can be used for both blowing and extracting. This allows air to be targeted into a room or area, or contaminated air to be exhausted. Thanks to its robust, rotomoulded plastic housing, the unit is designed for professional use while being easy to transport with a net weight of only 7.2 kg.
During construction drying and water damage restoration, targeted air movement ensures that humid air is removed from the affected surfaces. The Master BL 4800 supports this process through the continuous circulation of large volumes of air.
The fan can be used particularly effectively in combination with a professional dehumidifier or construction dryer. While the dehumidifier removes moisture from the room air, the BL 4800 ensures intense air movement in the affected area.
With dimensions of only 340 × 250 × 370 mm, the Master BL 4800 is particularly space-saving. The low net weight of 7.2 kg facilitates transport between different locations.
This makes the BL 4800 also suitable for companies that regularly use a mobile fan at different construction sites or for changing remediation and drying tasks.
For targeted air guidance, the Master BL 4800 can be equipped with a suitable Master PVC flex hose Ø 210 mm and 7.6 m in length. This allows air to be supplied or extracted in a targeted manner via a hose.
The suitable flex hose for the BL 4800 has the manufacturer's article number 4160.251. The hose is specifically intended as an accessory for the BL 4800.
The Master BL 4800 can be combined with a suitable dust bag Ø 203 mm, 3 m. The dust bag separates solid particles from the air flow and collects them on the surface of the filter material.
The manufacturer lists possible areas of application including demolition work, grinding of walls and floors, as well as work on terracotta or glaze. Workshops, production halls with dust exposure, and warehouses are also among the intended areas of application.
| Area of application | Use |
|---|---|
| Construction drying | Supporting drying through intensive air movement |
| Water damage restoration | Air circulation and targeted air guidance for drying and remediation work |
| Construction and renovation | Ventilation and air extraction during construction work |
| Dust extraction | In combination with a suitable dust bag for separating solid particles |
| Workshops | Ventilation and extraction of contaminated air |
| Production halls | Supporting air movement and dust extraction |
| Warehouses | Ventilation and air circulation |
| Agriculture | Mobile ventilation and air movement |
| Rental and hire | Versatile fan for professional drying and ventilation work |
| Feature | Value |
|---|---|
| Air capacity | 750 m³/h |
| Max. pressure | 245 Pa |
| Fan | Axial |
| Fan stages | 1 |
| Energy consumption | 250 W |
| Mains voltage | 220–240 V / 1 Ph / 50 Hz |
| Outlet size | Ø 200 mm |
| Air flow | Blowing / extracting |
| Protection class | IP44 |
| Product dimensions (L × W × H) | 340 × 250 × 370 mm |
| Packaging dimensions (L × W × H) | 370 × 270 × 390 mm |
| Net weight | 7.2 kg |
| Gross weight | 7.7 kg |
| Power connection | Connection cable with EU plug + fixed adapter for Switzerland |
The Master BL 4800 is not a dehumidifier, but a professional fan. However, it supports construction drying by moving the air in the room or at affected structural components. For technical construction drying, the fan is often used together with a suitable dehumidifier.
The Master BL 4800 reaches a maximum air capacity of 750 m³/h.
Yes. The fan can be used for both blowing and extracting.
Yes. The BL 4800 supports construction drying through intensive air movement and can be used in particular in the case of water damage together with a dehumidifier.
Yes. A suitable air hose can be connected to the intake and exhaust side. For example, a PVC flex hose with Ø 210 mm and 7.6 m length is available for the BL 4800.
In combination with the suitable dust bag, the fan can separate solid particles from the air flow. The manufacturer offers a 3 m long dust bag with an EPA 10 filtration level for this purpose.
The power consumption is only 250 W. The unit operates at 220–240 V, 1 phase, and 50 Hz.
The air connection has a diameter of 200 mm. For the suitable accessory, a hose with Ø 210 mm is specified.
The fan measures 340 × 250 × 370 mm and weighs only 7.2 kg net.
The Master BL 4800 is suitable for, among others, agriculture, commercial buildings, construction, industry and production, warehouses, water damage restoration, and rental and hire.
Yes. The fan has a robust rotomoulded housing, an IP44 protection class, and is designed for professional applications in construction, trade, industry, and water damage restoration.
The Master BL 4800 is the compact solution within the professional Master fan range. With 750 m³/h air capacity, 245 Pa maximum pressure, and only 250 W power consumption, it offers a good combination of performance, compact design, and low energy consumption.
By having the option to connect a suitable air hose or dust bag, the fan can be used flexibly for construction drying, water damage restoration, ventilation, and air extraction.
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