stratus
0.1 - 5.8 m³/s
Lead Time up to 4 weeks
Performance Up to 5.8m3/sec
Low Weight N/A
weatherproofing Optional

Casing

Construction

 Single Skin N/A
Single Skin N/A
Double Skin tick
Low Cost tick
Speed Controllable tick
Control Panels tick
Stratus Sratus Stratus

With twelve standard sizes and air volumes up to 5.8 m3/sec, the STRATUS Range is suitable for those air handling applications where space and size is not a strong consideration, but flexibility in meeting precise design and performance criteria. The standard range of STRATUS air handling units offers a range of Belt driven Forward or Backward curved D.I.D.W. centrifugal fans, pleated panel filters and L.P.H.W. Heating coils or Electric Heater Batteries, all housed within an aluminium pentapost frame with double skinned panels. Each STRATUS unit within the standard range has been designed for either internal or external mounting applications, with external units incorporating weather cowls and intake or discharge louvres.


  • Excellent performance characteristics with Air volumes of up to 5.8 m3/sec.
  • Flexibility in design with internal or external mounting units and a comprehensive range of accessories.
  • Slide rails allow installation and regular maintenance of standard components with minimal effort.
  • A cost effective, fast build alternative to welded steel frame air handling units.
  • A flexible modular construction which provides an easier on site build option.
  • Double skinned panels with smooth, clean lined outer skins to create an attractive, quality appearance and finish.
  • A flexible modular construction which provides an easier on site build option.
  • A framing structure which enables versatility in design by providing hanging, stacking or joining configurations.
  • Individual sections are joined by internal bolted joints, which makes on site installation easier and faster.
  • Matching silencers are available to fit ontthe inlet or outlet of the unit via a spacer section.
  • Units can be supplied with various heat recovery options to reduce energy consumption.
  • Units are acoustically and thermally lined.
  • All units can be supplied as Flat-Pac when access to plant room or site location is limited.
  • Channel base is fitted to all sections and Lockable panels are incorporated.
General

The STRATUS Belt drive pentapost units are suitable for either internal or external mounting arrangements. Although all units have galvanised casings as standard, they can be supplied with plastisol coated steel outer skins upon request. Panels are flush mounted into the unit framework rebates on a crush resistant closed cell neoprene sealing gasket, which provides an air seal between the panel and the component sections. Gaskets are chemically and biologically inert and meet all requirements of DW 144.

Internal Units

The standard STRATUS pentapost Air Handling units have an AA25 Anodised finish extruded aluminium section, constructed from either a 30mm or 40mm framework with a wall thickness of 1.5mm or 2.0mm dependant upon model selection. The mullion section is used between access panels and where panels are joined as part of the pentapost framework. The mullion is constructed from an AA25 Anodised finish extruded aluminium section, with a wall thickness of 1.5mm

The specially designed durable corner sections for the 30 or 40mm framework are manufactured from black high density glass reinforced nylon, providing a framework of strength and rigidity, onto which all internal components and casing panels are mounted. All access panels are held firmly in place on the framework by means of fasteners, which exert pressure evenly between the panels and sealing gasket. Access panels are lift off type with Allen key operated 'quick release' fasteners, while all other fixed panels are retained with roofing bolts, sealed using a high modulus acetoxy cure silicone sealant to BS 5889 Type B.

Handles are fitted to access panels as standard for ease of handling and removal from the air handling unit framework, which facilitates access to components for regular maintenance. Access panels can be hinged if required at no extra cost, which enables servicing of the unit without having to completely remove the panel. Infill panels are double skinned, constructed from 1.0mm thick pre galvanised sheet steel to BS 2989 Z2 inner and outer skins, using a sandwich construction enclosing 25mm of 65kg/m3 mineral wool insulation, which is completely encapsulated between the steel sheets for low noise transmission and heat insulation.

N.B. Fan access and filter removal can be from top, bottom or both sides.

External Units

The STRATUS pentapost Air Handling units have an AA25 anodised extruded aluminium section, constructed from either a 30mm or 40mm framework with a wall thickness of 1.5mm or 2.0mm dependant upon model selection. The mullion section is used between access panels and where panels are joined as part of the pentapost framework. The mullion is constructed from an AA25 Anodised finish extruded aluminium section, with a wall thickness of 1.5mm

The specially designed durable corner sections for the 30 or 40mm framework are manufactured from black high density glass reinforced nylon, providing a framework of strength and rigidity, onto which all internal components and casing panels are mounted. Handles are fitted as standard to access panels for ease of handling and removal from the air handling unit framework, which facilitates access to components for regular maintenance. All units are fitted with a weather cowl and intake or discharge louvres incorporating bird mesh screens to protect the air inlet or discharge openings against inclement weather.

All weather caps and external louvres are manufactured from 0.9mm Colorcoat HP200 material, British Steels roofing and cladding steel with 200 micrometre high performance plastisol coating, on a Galvatite hot dip zinc coated substrate to BS EN 10326:2001.

N.B. Fan access and filter removal can be from top, bottom or both sides.

Infill panels are double skinned, the inner skin constructed from 1.0mm thick pre galvanised sheet steel to BS 2989 Z2, with outer skins manufactured from 0.9mm Colorcoat HP200 material, British Steels roofing and cladding steel with 200 micrometre high performance plastisol coating, on a Galvatite hot dip zinc coated substrate to BS EN 10 147. Infill panels use a sandwich construction enclosing 25mm of 65kg/m3 mineral wool insulation, which is completely encapsulated between the inner and outer skins to provide acoustic and thermal insulation.

BASE FRAMES

Base frames are formed from 2.0mm thick pre galvanised sheet steel to BS EN 10142. The 100mm x 50mm high base frames are bolted together so as to achieve a rigid base for the Air handling unit. The channels come complete with pre-pierced holes for fixing in position and holes for lifting bars.

The fans are either double inlet double width or single inlet single width forward or backward curved centrifugal impellers housed in scrolls manufactured from pre hot dip galvanized steel EN 10142. Shafts are manufactured to EN 10083-2 Grade C40 or C45 carbon steel using] precision tools to cut keyways. All shafts are coated after assembly with an anti corrosion varnish.

The fan shaft is fixed by sealed for life bearings according to their size and features. Bearings used are either deep groove ball bearing type with an eccentric locking collar or an adapter sleeve, or spherical roller bearings dependant on duty. Light duty fan bearings are mounted in a rubber housing on inlet bolted spiders and heavy duty fans will have bearings mounted on cast iron supports.

The fan and motor are mounted on a sub frame, isolated from the unit casing by spring Anti-Vibration mounts and flexible connection from the fan discharge to minimise noise and vibration transmission. All wheels are statically and dynamically balanced to ISO1940 and AMCA 204/3 – G6.3 standards.

Fans are suitable for operating temperatures of between -20° C and +100° C depending on fan selection. Fan ratings are based on tests and procedures performed in accordance with AMCA publication 211 and AMCA publication 311 and comply with the requirements of the AMCA Certified Ratings Program.

Electric motors are squirrel cage induction, totally enclosed, fan cooled type, improved efficiency EFF2. Motors are suitable for 400V / 3Ph / 50Hz electrical supply, with Class F insulation in accordance with IEC 34-5 and IP55 protection class. Electric motor options include; Three phase, multi-voltage, 50/60Hz, Single phase, 50Hz, Single Speed and 2 Speed Dahlandler Winding or Dual Wound.

Pulleys are manufactured in accordance with ISO4183 and DIN2111. Made from GG25 cast iron, dynamically balanced and phosphated. The belts used are a wrapped wedge belt which is temperature and oil resistant with antistatic properties.

The wedge belt has a deeper cross section than conventional V-belts, therefore ensuring excellent grip and greater power ratings. The belts operating temperature range is -30 to +80 degrees C. The belts conform to ISO 4184, DIN 7753 and BS 3790, they also meet ISO 1813 for static conductivity. Taperlocks are manufactured from mild steel with machined key ways to BS 4235 Part 1 1972.

Pleated Panel filters are 100mm deep disposable type to Grade G4, in accordance with BS EN 779 1993 (EU4) and have a maximum operating temperature of 100 °C. They are for side, top or bottom withdrawal, mounted into the unit on slide rails, which are manufactured from pre-galvanised sheet steel to enable filter replacement.

Pleated Panel filters are manufactured from pleated media which consists of reinforced non-woven fibres, with expanded diamond grid to provide maximum support. Pleating the media effectively increases the filtration area to more than three times that of the face area, providing high dust holding capacity and low pressure loss. The pleat pack is encased in a water resistant lattice cardboard frame.

Hot Water Heating Coils (L.P.H.W.)

Coils are constructed from seamless drawn copper tube to BS 2871 mechanically expanded into aluminium fins with die formed self spacing collars. The coil casing is formed from heavy gauge galvanised sheet to BS 2989 to make a rigid assembly, with BSP(M) pipe fittings on coil flow and return connections. Tube end plates have die formed collared holes to allow expansion and contraction of the tubes without damage. All coils are subjected to an air under water test to 16 bar during manufacture. All coil sections are fitted into the units on pre-galvanised steel slide rails for ease of assembly and withdrawal.

(E.H.B)

Elements are constructed from Nichrome 5 spiral resistance wire surrounded by magnesium oxide powder and sheathed in stainless steel. The elements are mounted on a galvanized sheet steel terminal housing. All electric heaters are fitted with high temperature thermal cut out protection for wiring into the control circuit and are generally available in the power and number of steps required. A control system must be provided to ensure the heater is not activated when there is no airflow and the fan runs on after the heater has been switched off, to dissipate any residual heat. It is recommended that a fan run on timer be incorporated within the controls to prevent possible heat damage, as well as an airflow switch.