AlphaEx Dachventilatoren

Price on request

Nominal width
Speed Controller

The AlphaEx from RadonTec is a compact roof fan that has been specially developed for the underfloor extraction of radon gas.

Available nominal widths: 150, 200, 250 mm
Optionally with speed controller or transformer
Suitable for permanent outdoor use
Easy assembly and installation
High performance and control accuracy

Available immediately

This item has variations. Please select the requested variation.

RadonTec AlphaEx ventilator - the compact roof ventilator for radon extraction Systems

The AlphaEx was developed for the underfloor extraction of radon gas. With a drainage below the foundation, radon-containing soil air is extracted over a wide area and conducted outside by negative pressure. With a so-called radon well in or near the house, the radon-containing soil air is extracted selectively and thus kept away from the walls of the house that are in contact with the soil. This prevents the radon from entering the building.

The AlphaEx is suitable for permanent outdoor use.
Thanks to its compact and lightweight design, the roof fan is also suitable for roofs with a low load-bearing capacity and houses of lightweight construction.

Speed controller RS-1-400 or transformer RSA5E-2-P (optionally)

The single-phase fans of the AlphaEx series can be controlled with a speed controller or transformer.
When connecting several fans, it must be ensured that the maximum current and current consumption of the speed controller is not exceeded.

Stepless speed controller RS-1-400

On/off button with one indicator lamp
Gradual speed control: 5 speed control positions with output voltage 110 V - 130 V - 160 V - 190 V - 230 V
Non-combustible thermoplastic material
Ensure free air circulation for cooling the internal circuits
Connection terminals of the room thermostat or the frost protection thermostat (if the circuit is interrupted, the voltage supply to the fan motor is interrupted)
Terminals (230 V, max. 2A) for connection and control of external devices (e.g. air damper actuator)
Built-in motor protection device

Please note: Due to the phase control, a humming noise may occur in the lower speed range. In rooms with a requirement for low-noise fan operation, the RSA5E-2-P speed controller is recommended.

5-stage transformer RSA5E-2-P

On/off switching by turning the control knob
Low-noise
Plastic housing (incl. surface-mounted junction box)
High performance and control accuracy
Equipped with HF filter
Control from minimum voltage value (at which the fan proves smooth running) to maximum value
Minimum speed is set by the potentiometer on the control board
Input circuit is protected against overload with a fuse

The AlphaEx variants in comparison

The AlphaEx roof fan is available in three different variants, each of which differs in its nominal width and the resulting values.

	AlphaEx 150	AlphaEx 200	AlphaEx 250
Nominal width	150 mm	200 mm	250 mm
Nominal power	98 W	154 W	194 W
I_Max	0,43 A	0,67 A	0,85 A
Delivery volume	555 m³/h	950 m³/h	1310 m³/h
Weight	7,2 kg	8,1 kg	10,1 kg

All plus points at a glance

Units for venting, blowing out horizontally
Speed controllable
High pressure capacity and delivery volume
Radial impeller with backward curved blades
Alternating current version, with capacitor motor (operating capacitor ready for connection in terminal box)
Nominal width selectable: 150, 200, 250 mm
Optionally with speed controller

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Manufacturer according to GPSR
RadonTec GmbH

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