Fire gas engines

Fire gas engines, also known as fire gas engines or smoke engines, are special engines designed to operate in extreme conditions, particularly in the event of a fire. They are often used in security systems to ensure the safety of people and the integrity of buildings.


Fire gas engines are characterized by their high temperature resistance, which allows them to withstand the extreme conditions of a fire. They are resistant to smoke, moisture and other harmful gases that can be produced during a fire. Their reliability is crucial as they must provide consistent performance even in extreme conditions to ensure the necessary safety measures. These motors are made from special materials that are particularly robust and heat-resistant. In addition, they comply with special standards and regulations, such as EN 12101-3, which apply to safety equipment in buildings.


Fire gas engines have a wide range of applications in safety-critical systems. In smoke and heat exhaust systems, they are used to remove smoke and hot gases from a building in the event of a fire, improving visibility and making evacuation easier. They also power fire and smoke dampers, which open or close in the event of a fire to control the spread of smoke and flames. In emergency power generators, fire gas engines ensure that energy continues to be provided for vital systems in the event of a fire. In certain industrial and commercial buildings, they ensure adequate ventilation in ventilation systems even in the event of a fire. Finally, they are used in elevator drives to ensure that elevators can operate safely in the event of a fire, especially for emergency responders.

Our range of services

Based on the proven basic design of the VEM asynchronous motor series, a series was developed for use in mechanical smoke and heat extraction devices using specially modified insulation systems, bearings and connection technology.

Fire gas motors run under normal conditions as conventional fan motors and are designed in such a way that in the event of a fire, depending on the customer's specifications, they have to work at highly elevated temperatures for a certain period of time and are then allowed to fail. During development, the engines were subjected to strict tests in which the accident situations were simulated as far as possible.

Technical details


90 – 355

Performance range

0.25 – 500 kW

Fire gas classes

F200, 300, 400 and 600 according to EN 12101-3

Efficiency classes according to IEC 60034-30

without efficiency classification, Standard Efficiency IE1, High Efficiency IE2, Premium Efficiency IE3 (on request)< /td>


1,500, 1,000, 750, 600, 500 min⁻¹

Protection types

IP 55, optional IP 56, IP 65 according to EN 60034-5 (IEC 60034-5)


IM B3, IM B35, IM B5, IM B14, IM B34 and derived designs according to EN 60034-7

Types of cooling

according to EN 60034-6 (IEC 60034-6): self-ventilated, IC 411, forced-ventilated, IC 416, unventilated, IC 410

Coolant temperature/installation altitude

standard -20 °C to +40 °C, installation altitude 1000 m above sea level, different temperatures and installation altitudes on request


optional, RFID system iID®2000 (13.56 MHz based on ISO 15693), not suitable for emergency operations

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Additional operating instructions

Zusätzliche Bedienungsanleitung Brandgasmotoren

Additional operating instructions for combustion gas engines

EU declaration of conformity

EU-Konformitätserklärung für asynchrone Drehstrom-Motoren/-Generatoren mit Käfigläufer oder Schleifringläufer

EU declaration of conformity for asynchronous three-phase motors/generators with squirrel cage or slip ring rotors

Safety instructions

Sicherheitshinweise für elektrische Betriebsmittel in Niederspannungsstarkstromanlagen (2014/35/EU)

Safety instructions for electrical equipment in low-voltage power systems (2014/35/EU)

Assembly, operating and maintenance instructions

Zusätzliche Bedienungsanleitung Permanenterregte Synchronmotoren

Additional operating instructions permanent magnet synchronous motors