ALNOR VENTILATION SYSTEMS LTD - Ventilation Systems Manufacturer

FLXHDPE and FLXHDPEA plastic ducts are used to air distribution in domestic ventilation systems. Relatively small diameters allow to hide the installation in ceilings, screeds or suspended ceilings. FLXHDPE and FLXHDPEA semirigid ducts are connected to other system components like plenum boxes or distribution boxes with a simple push fit connection. Application of seals on the FLXPLO plenum boxes’ spigots guarantees high air tightness system. FL XHDPE and FL XHDPEA semirigid ducting is made of highimpact polyethylene. This makes the entire ventilation ductwork very durable. FLXHDPEA ducts are complying with European norm EN 171922018 for rigid or semirigid nonmetallic ductwork, which defines the test methods and performance characteristics like airtightness, pressure drop, reaction to fire, resistance to external pressure , thermal resistance and microbial resistance. FLXHDPE75 semirigid ducts without an antibacterial coating are gray.

The FLXPLOEPPF plenum boxes are part of the FLXREKU air distribution system designed for domestic mechanical ventilation systems, socalled the MVHR system, to which an air valve and FLXHDPE / FLXHDPEA ducts with a diameter of Ø75 are mounted. Due to their small size, they do not require much space or special installation. This allows achieving a larger usable floor area of the room. The FLXPLOEPPF plenum boxes are made of expanded polypropylene, i.e. EPP, while Ø75 spigots are made of ABS. The material used allows obtaining an aerodynamic shape of the inside of the box which leads to low air resistance.

FLXPLO / FLXPRO plenum boxes are components of the FLXREKU system intended for domestic mechanical ventilation systems, also known as mechanical ventilation heat recovery (MVHR) or heat recovery ventilation. The low profile plenum boxes require less installation space than standard solutions, which is very convenient when they should not be prominent once concealed. This advantage helps free up usable indoor area. FLXPLO plenum boxes are made of galvanized steel sheet. Plenum boxes made from stainless steel are available on request. Available also insulated plenum box version FLXPLI and FLXPRI. These plenum boxes have inside a insulation lining made from 9 mm thick rubber foam. FLXPLO plenum boxes are equipped with duct connection spigot Ød2 with a EPDM seal – this type of connection with FLXHDPE ducting is airtight and easy to install.

Electrostatic precipitator eMOCarz was design for residential buildings. Compact size and exceptionally low pressure drop makes it suitable for residential heat recovery systems, with little impact on system performance. The filtration efficiency of ePM1 and ePM2.5 particles, the main component of smog, is as high as 95%. Polluted air initially passes through a steel mesh prefilter (which retains larger fractions), then is positively ionized in an electric field due to the “crown discharge” effect. In the last stage, the previously charged particles, are pulled by electrostatic force toward horizontally mounted aluminium plates (electrodes) and build up on their surface. Electrostatic filters (precipitators) have low power consumption (only few Watts), long service life and most of all there’s no need to exchanged dirty (clogged) filters. It is enough to clean in with water and detergent once or twice a year. There is a led status indicator on the casing.

The smog filter is designed for effective filtration of the socalled particulate matter. The PM2.5 and PM10 particles are the main component of smog, which have an optical diameter of 2.5 and 10 μm (micrometers). The filtration efficiency (removal) of PM2.5 particles reaches up to 73%, and PM10 particles up to 81% (according to tests carried out with a dust particle measuring device). The smog duct filter consists of a sealed filter box and two filters prefilter and smog filter. It is recommended to install a smog filter on the supply ducts in domestic ventilation and heat recovery systems. In the MOCarzCA version prefilter I3 was replaced by an activated carbon prefilter (or activated charcoal). The main purpose of using such a material is deodorization of air and preliminary cleaning of dust and gaseous pollutants. Activated carbon has a huge adsorption surface, which effectively "binds" on its surface particles of pollutants, bacteria, hydrocarbons.

The silencers are delivered with the SPIRAL® system seals in the standard version. The diameter sizes d1 > 315 mm require ordering the NSL male couplings which need to be installed in the silencer before connecting the silencer to the ductwork. The male fittings are available separately. They are not delivered with the silencers. Glass wool thickness inside the silencer 50 mm for SIL50 depends on the outer cladding size. 100 mm for SIL100 depends on the outer cladding size. Insulation Insulation material glass wool. Insulation type trimmed from reel, flexible. Reaction to fire A1 acc. to EN 13162

The SLC and SRC rectangular duct silencers reduce the noise level in ventilation and A/C systems. This silencer type is usually installed between a fan and an air supply or exhaust duct, and upstream of air supply vents. All silencers are made of a housing and inner baffles. The housing is made from galvanized steel sheet and its ends are framed with steel sheet angles. All baffles inside the silencer have a round breast at one end and comprise a galvanized steel frame with a soundinsulating insert which absorbs the acoustic energy from the air flow. The soundinsulating insert is a set of nonflammable mineral wool panels. The outer surface of the soundinsulating insert is lined with a special abrasionresistant textile to protect the mineral wool from wear and tear. The mineral wool panels are finished with a glass fibre lining in black; this lining is suitable for systems with a maximum air flow rate of 20 m/s.

The SLEFL flexible silencer is made of the Alnor Flex perforated duct. The sound insulating layer is 25 mm thick and clad in aluminium and polyester. The silencer is connected to the ductwork with male flanges made of metal. The product is available in two length sizes, 600 mm and 1200 mm. Other silencer versions are available on request with EPDM gaskets, female flanges, or in other length sizes. Insulation Insulation material glass wool. Insulation type trimmed from reel, flexible. Temperature range 20°C to +140°C Thermal insulation performance of mineral wool λ = 0.034 W/mK at 24°C Pressure drop See the enclosed diagram. Fire resistance The silencers are made from fireproof materials.

The DATL/DAT dampers are designed for cladding with up to 50 mm thick insulation. The DATL/DAT dampers are a good choice when the ductwork closure must be airtight. The damper closure position can be read on the 0° to 90° dial of the control handle. The damper closure opening ratio can be fixed with a screw. DAT — airtight shutoff damper DATL — airtight shutoff damper with gaskets at flanged ends All DATL/DAT dampers of diameter 355 mm or greater have the damper closure pivot provided with extra bracing. All DATL/DAT dampers of diameter 450 mm or greater are supplied with the KITDSH damper mechanism control lever. Standard dampers are made from galvanized steel sheet.

The DAOS dampers feature a split flap closure and allow the air flow to pass in one direction only. The aluminium closure flaps are pressed against a foam seal when closed to reduce the operating noise in the ductwork. The split flap closure is held closed with a spring gear, which makes it also possible to use the damper in vertical installations. A version intended for a fullmale insertion into the ductwork ends is available on special request.