Duct elements are electric or water duct heaters, external weather louvres, filter boxes, filters, back draft louvre shutters, backdraft shutters, regulation dampers, mixing valves, dampers, protection grilles, flexible flange connectors and airflow regulators. In general, the duct elements are standard components of the ventilation systems.
Filter boxes (cassettes) are HVAC elements used for air filtration in HVAC systems. Filter boxes (cassettes) are designed for HVAC ducts. The filter housings are made of galvanized sheet steel. The transported air must not contain particles that could cause damage to parts of the filters. The filter boxes (cassettes) are equipped with a door for the possibility to replace the filter cartridge. They standardly contain a G4 class filter or have no filter.
Filters are made of modern filter materials, which achieve high retention capacity of dust particles up to the standard pressure loss. The high retention capacity extends filter life and economy of HVAC equipment operation. The maximum utilization of the filtering surface is ensured by spacers in the individual filter pockets. Depending on the type of filter, the filter material is standardly embedded in a high-strength plastic or metal frame with wooden or metal separators or in other materials according to customer's requirements.
The HVAC dampers are a protective and basic regulating element of the HVAC ducting. The dampers are available in several variants and designs - control dampers, mixing dampers, throttle dampers, backdraft dampers, louver dampers, hand-operated dampers, servo-controlled dampers, dampers for circular and four-sided ducts. As standard, we supply plastic or galvanized sheet metal dampers. We can supply some types made of stainless steel or aluminum on request.
External weather louvre
The weatherproof louvres are used primarily to protect the inlets and outlets of HVAC ducting. The weatherproof louvres are also used as a functional architectural element with a large number of surface variants and especially colours (according to the RAL colour chart). Last but not least, the weatherproof louvres are used to prevent a direct view of protected areas through openings in ducts or directly on the facades of residential, office or industrial buildings.
The PHZE acoustic louvres are used to attenuate the noise spreading through ventilation openings from areas exposed to noise into the external environment. The acoustic louvres are the most commonly used in engine rooms, compressor rooms and in similar noisy production areas. The acoustic louvre panels are filled with acoustically absorbent material with perforated sheet metal for maximum sound absorption. The acoustic louvres are standardly equipped with a net against insects and small animals.
Silencers for circular and four-sided ducts effectively attenuate the noise travelling through the ductwork. If higher attenuation is required, it is possible to use more silencers one after another. For the highest attenuation, place the silencer immediately behind a fan or a bend.
Airflow controllers are designed for constant (CAV) or variable (VAV) airflow volume control in circular or four-sided HVAC ducts. Thanks to the regulation of air flow volume or duct pressure, the use of variable or constant air flow volume controllers is more economical for the operation of the HVAC systems. We supply air flow controllers for circular and four-sided ducts, from manually operated to electrically adjustable by servo drives.
Duct heaters are HVAC devices used for air heating in HVAC systems. Duct heater housings are made of galvanized sheet steel. Installation and placement of the electric air heaters must be unconditionally carried out in accordance with ČSN 33 2000-4-42 (IEC 364-4-42), where conditions are laid down in terms of protection against the effects of heat, fire, protection against burns and protection against overheating (including appropriate protective and safety circuits).
Duct coolers are HVAC components suitable for air cooling in HVAC systems and are designed for installation in circular ducts. The coolers are divided into two groups - water coolers and freon coolers. The cooler housings are made of galvanized sheet steel or zinc aluminium and the exchanger is made of copper tubes with aluminum plates.
Droplet eliminators are designed for separating condensed droplets from air in ventilation and air conditioning systems. The eliminators are designed for direct installation into four-sided HVAC ducts. The separated air must not contain fibrous, solid, adhesive and aggressive impurities. The air must not contain chemicals that cause corrosion or negatively affect zinc. The droplet eliminator housing is made of galvanized sheet with insulation against moisture condensation. The droplet eliminators can only be installed in a position that allows condensate to drain (basin down). The eliminator is most effective in the air flow stream behind a cooler or a heat recovery unit. We recommend that the duct connections should be waterproof.
Circular flexible connections are designed to prevent the propagation of vibrations and noise generated by the operation of fans or other machinery. The damping pad is inserted between the vibration source and the air ducts. An unique flange ensures perfect airtight and watertight connection of ductwork. Different design options and sizes of flexible connections allow use in any operating conditions.