In recent years, fan technologies have evolved greatly. New jet technologies have been introduced and have quickly replaced fans with pure cone technology. This is especially true for pressure difference points that tend to be smaller but are often used for initial attack, such as doors and windows. Jet technology uses a concentrated high-pressure jet, and this complete and concentrated airflow is used to build pressure and ventilate the building structure. A cone/cone, due to its rapidly expanding working area, loses its working pressure at these very pressure differential points. Often large amounts of air are wasted because the distance from the fan to the inlet opening (pressure difference point) is not optimally chosen. This is because air hits the wall around the door at an unsuitable distance and remains unused in terms of pressure buildup.
BlowHard firefighting ventilators have been tested and comply with the new DIN 14963 standard for portable ventilation equipment.
Quickee – DIN14963-EM-A-1-1
Battery life is important for PPV Firefighting-Fans because every firefighter should decide for himself when he no longer needs the high-pressure fan. BLOWHARD relies on integrated high-power batteries because they enable a loss-free energy transfer, a longer running time of the fans, and a longer life than is possible with replaceable batteries. In addition to battery temperature management, the integrated battery technology also enables the IP 67 standard. The devices are therefore dust & waterproof and are therefore also ideally suited for tough firefighting operations.
The fundamental goals for every BLOWHARD Firefighting Fan are the highest and industry-leading performance values. Here, not only the battery, motor, and electronics used are decisive, but also in particular the aerodynamic design of the fan unit, such as the rotor blades and their number, as well as the design of the air grille and much more. The decisive factor is how efficiently the fan is able to handle the power provided by the battery.
Performance without control is useless. This also applies to firefighting fans. Even the highest air volumes and the highest air pressure are of no use if they cannot be targeted and used efficiently at the point of use. The BLOWHARD High-Flow-Jet airflow management system takes advantage of the already high-performance values of BLOWHARD fans and directs them precisely to the desired location. It simply offers you more options and reserves. It makes BLOWHARD an unbeatable helper in fire and smoke management.
Not every location is the same. The BLOWHARD fan design allows you to continuously tilt the airflow up to 180 degrees and precisely adjust the airflow to the conditions at the deployment site. This stepless adjustment capability allows for a wide range of tactical settings and arrangements at the job site. BLOWHARD provides you with simple but highly effective and safe PPV ventilation, no matter what the nature of your deployment site looks like.
On the emergency site, every second counts. BLOWHARD units are designed to be deployed very quickly and with maximum effectiveness at the fire scene. Both, the lightweight and the small volume of the PPV ventilators are of crucial importance for rescuers. The units are light enough to be carried to the scene by a single person and take up little storage space on fire trucks.
BLOWHARD firefighting fans are designed and manufactured for use in the toughest fire scene conditions. Water, sand, impact, and heat make little difference to the BLOWHARD fans. No wonder, because they were developed together with firefighting professionals. Despite their lightness, no compromises are made on solid construction. The firefighter fans are suitable and tested for many years of use under the toughest firefighting conditions.
At the scene of a fire, every second counts. This applies both to the fire scene and to the rescuers as well as the possible victims. BLOWHARD high-pressure ventilators, which are indispensable in such rescues, are therefore ready for use extremely quickly. The firefighters’ concentration should be on the operation and tactics at the fire scene, not on the cumbersome set-up and operation of the firefighting ventilators. BLOWHARD fans are built in such a way that anyone can quickly set them up at the scene, even without explanation
As easy as that – Simply set down the BLOWHARD fan, align it and start the high-pressure fan, focusing full attention on the source of the fire. The operation of the equipment must not be a mystery. Electronic “gimmicks” are of little use, as concentration should be on the mission and mission-tactics, not on the operation of the equipment. Even without technical training, BLOWHARD fans are very easy to operate.
BLOWHARD PPV positive pressure ventilators are designed for low operating costs. On the one hand, the units offer very high mechanical quality combined with a very long service life. The fire department ventilators always provide you with appropriate reserves, which reduces the overall load on the ventilators. The availability of spare parts and corresponding warranty plans further reduce your operating costs. Components of the highest quality are installed which have been developed in-house and manufactured for this purpose. Only the most modern, reliable, tested, and certified battery technology is used. So that the rescuers do not face any surprises.
Electric fans, battery-powered fans – There is a decisive relationship between air speed, air volume, and pressure at the scene of the fire. This determines the safety of the first responder and the speed at which the fire scene can be “exhausted” and subsequently extinguished.
Traditionally, the CFM value (m3/h) is used as an indicator to determine the effectiveness and strength of a fan, and often the values given are at zero pressure (AMCA). The CFM value (m3/h) is correct and important for making initial comparisons between different products. Nevertheless, it says too little about the real effectiveness and efficiency of the fan.
In order to be able to effectively “ventilate” distant sources of fire, it is not the air velocity or the volume that is decisive, but the pressure that is built up even over a long distance. Ventilation thus takes place through pressure differences between the interior of the building and the external environment.
Fans with modern airflow management maximize this pressure in a building to achieve maximum ventilation success. Thus, they do not rely on pure power, but on the smart use of available resources. Even though on paper the data is the same, fans with airflow management achieve greater efficiency in supporting and securing the operations team.
Whether a fan has airflow management can be recognized on the one hand by the rotor blade design, the inlet, and outlet grilles, and a corresponding electronic control system.
Smart management of energy and power is especially crucial for battery-powered fans. For example, maximum fan power is needed only briefly at the beginning of the operation to build up pressure in the building.
After that, it is advisable to adjust the fan power to the conditions at the site of operation. Fans with high-efficiency airflow management have decisive advantages here because the reduction in output can be made without losing efficiency at the source of the fire. This translates into an exponentially longer runtime for a mature fan.
Fans without appropriate management are loaded much higher to build up the same pressure at the source of the fire. This translates into a shorter battery life.
It is important to note that AMCA is a useful tool for comparing similar fan technologies, but should not be used as a comparison for different technologies. Cone units should be compared to each other using this standard, or even jet units. The same applies to new combined technologies such as those developed by BLOWHARD.
Because of these discrepancies, comparing fans has become difficult for both the buyer and the fan manufacturer. Today’s marketing seems to boil down to each company touting its product capabilities, whether they are true or not and then offering a one-dimensional solution to sell them. In reality, the effectiveness of a fan is not one-dimensional, but a combination of several factors. The dimensions addressed are
A firefighter’s workplace is always a “state of emergency with intense conditions” in a first-response situation and presents extreme physical and mental challenges to first responders, which are sometimes life-threatening. Therefore, the performance of a PPV ventilator (or any other apparatus used in firefighting operations) should be evaluated from the time the firefighter arrives on the scene until he or she leaves the scene.
While fan performance is an important metric in this regard, it is far from the only relevant metric. The true performance of a fan goes beyond simply turning it on in a controlled environment for comparison purposes and should be evaluated in the field. Certainty can only come from a test on your part. All qualified fan manufacturers have demo units available, which you should definitely try out against each other in a test.
Ultimately, the success of ventilation also depends on how well you can position the fan at the inlet opening. But this inlet opening does not always play along and is often also above or below the normal level. Since we know that the distances to the inlet opening are important, it is often necessary to ventilate upwards (stairs) or downwards (cellar entrance).
Experiments have clearly shown that the optimal meeting of the entrance opening plays a very decisive role in the success of the operation. An optimal angle of inclination (negative as well as positive) makes it possible to use the whole power of the fan even in more inaccessible places. The differences between the devices can be proven in practice by means of suitable measuring instruments. However, it is recommended for practical use to adjust the tilt angle of the respective fan so that the airflow is directed centrally to the inlet opening. Not all devices are easy to adjust the tilt angle. Each manufacturer has its own system in use here and in some cases, the inclination angles are severely limited. Ventilations into staircases (positive) or into cellars (negative) or even shafts (negative) are made impossible (Attention: Shaft ventilation also requires EX-protected fans).
Not only does the inclination up or down promises the corresponding improvement of the performance, but also the positioning of the fan to the left or right (and thus out of the actually straight ventilation axis) can maximize the success depending on the location. But more about that in the part: Ventilation tactics of this knowledge series.
A motor from the shelf, a rotor from the shelf, and a ventilation grille made of round bars which protect against reaching into the rotor blades and ready is a fan for comparatively little money. However, this does not guarantee optimal success, because all these components must be optimally matched to each other.
The rotor is the most important component because it converts the available energy from the batteries into the desired airflow. Its geometry determines how strong the airflow is and what pressure it is able to build up. It decides how much the battery is loaded and how long the fan will run on one charge. It decides what noise your fan will make.
Make sure that the rotor is designed and manufactured specifically for this application. Indications for this are different geometries near the hub and in the outer area of the blades, double rotor fins, blade profile, number of blades, or whether the blades are guided at their end in the housing.
In addition, the ventilation grille has more than just a protective function. The ventilation grille is critical to direct the airflow appropriately. It shapes the airflow and is responsible for whether your device can form an effective jet airflow. In rotor blades and air grille lies the effective engineering performance of a professional fan.
PROTECT your patients after recovery – RIGLOO RESCUER – Rescue shelters, medical shelters & ambulance shelters for pre-hospital use
MANAGE your operation, not your pump. – KUBE-POMPA – The pump for the rough jobs. Works in almost any application situation
BCC ensures communication in emergency situations. It connects the networks that still exist and extends the limits through interoperability
SECURE your site additionally with – CARE-FLARE – Emergency Warning and Safety- High-Power LED Flashlights and Warningbeacons
20″ QUICKEE – For fast, flexible and effective ventilation use.
Our compact and lightweight QUICKEE firefighting fan & ventilator is based on the proven technology of our successful BH-20 model, but offers more power in an even smaller and lighter housing and is the most efficient and effective unit on the market, replacing electric fans thanks to its excellent performance values.
24″ COMMANDO – When fan power is needed in serious emergencies
Our big power model for larger fire scenes or simply when pure power is needed. As a battery-powered fan, COMMANDO is sometimes more powerful than some gasoline-powered fans. Yet COMMANDO is lightweight and ergonomic enough to be set up and operated by a single person.