Casing Construction Grades

Our Eurovent certified AHU casing construction follows Eurovent per EN 1886 complying the below features.

• Casing leakage test L1 (-400 pa).
• Casing leakage test L1 (+700 pa).
• Casing strength D1 (2500 Pa).
• Thermal Bridging TB2.
• Thermal Transmittance T2.
• Filter Bypass leakage F9 ( -400 pa).
• Filter Bypass leakage F9 ( +700 pa).

Aluminum Frame

The structure is made from hollow extruded heavy aluminum profiles internally radius coving profile restricting water stagnation and mold/fungus formation along the internal corners of profile, anodized for extra anti-corrosion protection. The frame provides excellent rigidity and stability to the structure along with good aesthetics. These profiles are specially designed for HVAC applications, Profiles are connected using special die-cast Glass-filled nylon corner pieces to form the air handling unit sections.

Frame sizes for panels are of 25mm and 50mm thickness. 50mm thermal break profile has excellent thermal bridging and the least thermal transmittance properties which are by EN1886.

Below is the standard feature of this construction:

• Aluminum frame construction.
• Good mechanical strength.
• Perfect appearance and precise dimensions.
• Quick and precise installation of the interior components.
• Can be easily dismantled and assembled at minimum time and cost.
• The flexibility of Construction.

Panel

Panels features sandwich double skin type with a pre-painted galvanized outer steel and inner as a galvanized sheet.

Polyurethane foam insulation is injected between the two sheets to make sandwich panels. A minimum density of 40kg/m3 maintained throughout panel. Higher density of up to 48kg/m3 can be made on special application.Stainless steel 304, Stainless steel 316, or Aluminum sheets can be provided for double skin panels as an option. The Polyurethane injected panels have excellent heat insulation and noise reduction properties and add extra mechanical strength and rigidity to the structure. The factory injected PUF is CFC & HFC-free and self-extinguishing type.

The maximum heat transfer coefficient for 25 mm, and 50 mm thermal break is U = 0.73 w/m3K and 0.35w/m3K respectively. Panels are fixed to profile with a high-quality gasket which has excellent sealing properties and good resistance to compression stress and temperature.

Base Frame

Base Frame is constructed out of the Sendzimir Galvanized sheet steel with factory-applied epoxy paint & heavy-duty lifting holes.

Mild steel channel frames if required is provided for larger capacity units. 100 mm high Base frame is provided for the floor-mounted units.

Hanging supports are provided for the ceiling suspended units to hang units.

Fans

The unit consists of AMCA certified DIDW or SISW belt driven which can be either Forward, Backward curved or Aerofoil bladed. The type of blades is selected based on static pressure and efficiency requirements.

Plenum/Plug type backward curved fans with motors directly coupled is in trend for customer demand. The Fans are AMCA certified for Sound & Air Performance and Fan grade efficiency. Statically and dynamically balanced to ISO1940 and AMCA 204 – G2.5 standards fans are used.

Plenum fans equipped with low noise, low power consumption, and long-lasting EC motors with high energy efficiency. Energy efficient units on AHU’s with EC fans can save up to 40 to 50% of power consumption compared to conventional fans.

Motors

Finpower provide standard foot-mounted, TEFC, 3 phase induction motors with a standard efficiency of EFF-2.  High energy efficiency motors rated EFF-1 and premium efficiency motors on project requirements.

The motors are IP 54 rated and Class F insulated with a temperature rise to class B. Flameproof, Explosion-proof and Permanent magnet motors comes as option for special applications.

Fan and Motor Assembly

Fan and motor are mounted on heavy gauge galvanized steel base frame with high-efficiency vibration isolators (Spring Isolators or Rubber mounts) to ensure no vibration is transmitted to the unit casing.

The Isolators are designed for 92% efficiency. The Isolators are selected based on the weight of the fan and motor assembly and the higher value of RPM of the Fan or Motor.

Pulley and V Belts

Cast iron pulley with balancing equals to G2.5 is used with minimum of 2 grooves, SPA and SPB type of pulleys are used based on the motor capacity. V belts used are of high grade, anti static and oil resistance type.

Droplet Eliminators

• Droplet eliminators is provided on request for coil face velocity that exceed 2.54 m/s.
• MOC is of aluminum, PVC, or stainless steel for the droplet eliminator.

Cooling & Heating Coils

• Standard Chilled water coils are made in either 3/8”, 1/2” & 5/8”dia. seamless copper tubes which are mechanically expanded with rippled aluminum fins.
• This ensures high heat transfer efficiency, low air resistance, and longer coil life.
• The cooling coil is designed as per AHRI-410 standard.
• Hydrophilic Aluminum or Copper fins available on special request.
• Additional option of anti corrosive coatings such as Heresite™ or blygold™ available.
• All Coils are provided with Copper /Mild steel headers. Coils are provided with Brass Threaded Male Adaptors / Connectors.
• Refrigerant coils are provided with Brass Distributors. Air & Drain vents made of Brass are standard for Water Coils.
• The standard casing material for all coils is Galvanized Steel. The casing is manufactured with Stainless Steel as optiona.
• AHRI-410 certified coils can be provided.

Drain Pan

The drain pan is made from galvanized steel powder coated corrosion-resistant as standard. Stainless Steel 304 grade as an optional feature. Multi slope drain pans are designed as per ASHRAE 62 to ensure all condensate is drained and no microbial growth formed thus maintaining Indoor Air Quality.

The Drain pan is insulated externally with 10mm closed cell Elastomeric foam to avoid surface condensate from outside. Stainless Steel 316 grade drain pan can be provided as an option.

Filters-Pre Filters

Filter sections are suitable for the insertion of various types of filters. Filter sections are equipped with easily removable panels to permit and fasten the filters after the inspection and replacement. A complete line of filters is available to meet all kinds of filtration efficiency and requirements.

Single or multi-station filtration to suit different applications conforming to the latest ASHRAE & EUROVENT standards are provided. The filters are arranged in the grid in heavy-duty specially designed galvanized sheet steel frames to avoid air bypass and are removable and washable type.

Filters-Metallic Filters

• A grease or Metallic filter is suitable for kitchen extract.
• Metal Series for heavy-duty & coarse filtration.
• Washable filter.
• G2 Grade.
• High Dust holding capacity filters METALLIC FILTER.
• Bag, pocket type.
• Non-woven synthetic or Glass fi ber media.
• Flange-type construction.
• UL classified media.
• Low-pressure drop and longer life.
• Available in depth option of 300mm , 500mm & 600mm.
• Used for filtration of particles from 5 microns up to 1 micron SOFT BAG.

Filters-Soft Bag Filter

• Bag, pocket type.
• Non woven synthetic or Glass fiber media.
• Flange-type construction.
• UL classified media.
• Low-pressure drop and longer life.
• Available in depth option of 300mm, 500mm & 600mm.
• Used for filtration of particles from 5 microns up to 1 micron.

Filters-Rigid V Cell Filter

• Mini pleat rigid bag filter.
• Microfine glass fiber media.
• Flange-type construction.
• Low initial pressure drop.
• UL certified media.
• Large surface area.
• Available in a wide range of efficiencies from F6 to F9 grade.
• Used for filtration of particles from 5 microns up to 1 micron.

Filters-Hepa Filters

• High-Efficiency Particulate Air Filters are made of Glass fibers.
• Used for Filtration of Particles of size up to 0.3 microns.
• The efficiency of filters is 99.97%.
• HEPA Filter is generally 300 mm in depth.
• Used in Operation theaters, Cleanroom Applications.

Filters-Carbon Filters

• Odor filtration is done by using activated carbon to remove volatile organic compounds in the air.
• Filters are made of activated carbon impregnated granules filled in deep bed panels arranged in a V shape and encased in a metallic box.
• Used for odor control.
• Also, use to treat some of the harmful gases in the air.

Filters-UV Emitter

Ultraviolet lamps are factory fitted as an option in the Air handling units to prevent microbial growth and other airborne contamination.

The UV lamps is placed upstream or downstream of the cooling coil and is used in the ecology unit to minimize the emission of harmful gases in the air.

Heat Recovery Wheel (HW)

The thermal wheel is used to recover the energy from the exhaust air and subsequently bring down the overall cooling load.
The thermal wheels are air-to-air rotary heat exchangers and can recover energy up to 80% without spoiling the IAQ. The heat wheel can recover both the sensible as well as latent heat which is reducing the load on the main cooling coil by around 30 %.

Two basic types of Wheels are available.

• Sensible heat recovery wheel – for sensible heat recovery only
• Enthalpy heat recovery wheel – for Sensible and latent recovery. The thermal wheel is a revolving cylinder divided into several parallel flutes.

Heat Pipe (HP)

Horseshoe coils are self-sustaining coils that operate entirely on ambient temperature no external power source is required.
It helps to maintain the humidity, and regulate the temperature of the indoor air with a dehumidifier.

Electric Heater (EH)

Electric heaters are used for sensible or reheating purposes to control the temperature and humidity respectively. Stainless steel-finned tubular heating elements which are safe and durable are used. Stainless steel fins are brazed to stainless steel tubular sheath which includes 80/20 nickel chrome resistance wire connected to terminal pins.

The electric heaters with different capacities can be provided with different watt densities as per the requirement. The heater can be provided in 3 phases or single phases as per the specifications. The heater can be provided with magnetic contactors, thyristor controller or stage controller and disconnect switch (optional feature). Finpower provide UL listed Maxell branded duct heater in case of special requirement

Configuration

• Single Tier
• Double Tier
• Horizontal Floor Mounted unit
• Ceiling Suspended units
• Horizontal Floor Mounted units
• Vertical Floor mounted units

Products:

Fresh Air handling units (FAHU).
Air handling units (AHU).
Heat recovery air handling units.
Heat recovery ventilators.
Ecology Units.
Dx type Air handling Units.

Fresh Air Handling Units

SK50T (T- Thermal break)

SK50T – Series are Horizontal Floor-mounted Fresh Air handling units capable of handling the air volume from 1700 CMH to 60000 CMH and handling external static pressure of up to 1000 pa.

The casing consists of a 50 mm thick profile with a Thermal bridge which ensures that no condensation takes place on the surface of AHU. The panels are 50 mm thick insulated with CFC free PUF with a uniform density of 40 kg/m3. The unit consists of the following components.

• Intake section with G.I powder-coated sand trap louvers (optional).
• Combination filter section with pre and bag filters.
• Cooling coil (CHW or DX type).
• Forward or backward-curved blower.
• 3 phase foot-mounted induction motor.

Fresh Air Handling Units

SK50T-PO (P-Heat pipe)

SK50T-PO – Series are Horizontal Floor-mounted Fresh Air handling units capable of handling the air volume from 1700 CMH to 60000 CMH and handling external static pressure of up to 1000 pa.

The casing consists of a 50 mm thick profile with a Thermal bridge which ensures that no condensation takes place on the surface of AHU. The panels are 50 mm thick insulated with CFC-free PUF with a uniform density of 40 kg/m3. The unit consists of the following components

• Intake section with G.I powder-coated sand trap louvers (optional)
• Combination filter section with pre and bag filters
• Horseshoe heat pipe for energy recovery and cooling and dehumidification
• Cooling coil (CHW or DX type)
• Forward or backward-curved blower
• 3 phase foot-mounted induction motor.

Fresh Air Handling Units

SK50T-WO (W- Heat wheel)

SK50T-WO-Series are Fresh Air handling units capable of handling the air volume from 1700 CMH to 60000 CMH and handling external static pressure of up to 1000 pa. The casing consists of a 50 mm thick profile with a Thermal bridge which ensures that no condensation takes place on the surface of AHU.

The panels are 50 mm thick insulated with CFC free PUF with a uniform density of 40 kg/m3. The unit consists of the following components:

Double tier units with supply section on the lower side and return/exhaust on upper side Supply Section:

• Intake section with G.I powder-coated sand trap louvers (optional)
• Combination filter section with pre and bag filters
• Rotary heat recovery wheel or PHE or HPHR for energy recovery
• Forward or Backward curved blower
• 3 phase foot mounted induction motor

Return Section:

• Intake section
• Prefilter
• Rotary heat recovery wheel for energy recovery
• Forward or backward-curved blower
• 3 phase foot mounted induction motor

Fresh Air Handling Units

SK50T-PW (with heat exchanger and heat pipe)

SK50T-PW- Series are Fresh Air handling units capable of handling the air volume from 1700 CMH to 60000 CMH and handling external static pressure of up to 1000 pa. The casing consists of a 50 mm thick profile with a Thermal bridge which ensures that no condensation takes place on the surface of AHU.

The panels are 50 mm thick insulated with CFC-free PUF with a uniform density of 40 kg/m3. The unit consists of the following components. Double tier units with supply section on the lower side and return/exhaust on the upper side

Supply Section:

• Intake section with G.I powder-coated sand trap louvers (optional)
• Combination filter section with pre and bag filters
• Rotary heat recovery wheel for energy recovery
• Horseshoe heat pipe for energy recovery and cooling and dehumidification
• Cooling coil ( CHW or DX type)
• Forward or Backward curved blower
• 3 phase foot mounted induction motor

Return Section:

• Intake section
• Pre-filter
• Rotary heat recovery wheel for energy recovery
• Forward or Backward curved blower
• 3 phase foot mounted induction motor

Sound Attenuators (SAT)

Sound Attenuators can be provided as an integral part of AHU and can be placed both in supply and return air stream for noise reduction generated by fans. Square and rectangular bull nose construction SAT are designed to handle maximum air capacities and sound vibrations at minimum pressure drop.

Noise radiated is minimized by double skin construction and bull nose design of splitter at the air inlet providing good aerodynamics.

Attenuator provided are manufactured from high-quality Galvanized sheets of thickness conforming to JIS 3302 or BS 2989 (Stainless steel and Aluminum can be provided as an option).

Acoustic material is of inorganic non-hygroscopic mineral fiber incombustible with class 1 Fire rating conforming to BS 476. Sound attenuators are conforming to international standards.

Air Handling Units

SK-25-FM/CS – Non Eurovent Series

Standard Air handling is of two types: Floor mounted (FM) / Ceiling-suspended (CS) which is also known as re-circulation of  Air Handling Units (AHU).

Horizontal Floor Mounted units (FM). SK-25-FM series consists of the 25 mm thick profile without thermal Indoor applications are insulated with double skin CFC free PUF with a uniform Density of 40 Kg/m3.

The unit consists of the following features:

• Pre filter section
• Cooling coil section
• Forward or backward-curved blower
• 3 phase induction motor
• A mixing box can be provided if required