In today's world, where air conditioning and precise environmental control play a vital role in the efficiency of various industries—especially in agriculture and animal husbandry—choosing high-quality and genuine equipment is of utmost importance. Industrial ventilators, particularly well-known models like Big Herdsman, are an integral part of ventilation systems in environments such as greenhouses and poultry farms. The proper functioning of these ventilation fans has a direct impact on plant health, poultry growth, and ultimately, the profitability of your business. Therefore, recognizing the differences between a genuine Big Herdsman greenhouse or poultry house ventilator and counterfeit products on the market is an undeniable necessity.
Unfortunately, as the popularity of reputable brands increases, opportunists also step in, producing and offering counterfeit products that may look similar but are of poor quality. These non-genuine ventilators not only fail to deliver the expected performance but may also lead to serious issues such as increased energy consumption, frequent breakdowns, disruption of optimal ventilation conditions in facilities, and consequently, significant financial losses. The purpose of this article is to provide a comprehensive and practical guide for identifying genuine Big Herdsman greenhouse and poultry ventilation systems from fake ones, so you can make the best choice for your facility with confidence and protect your investment.
In this regard, it is worth mentioning that Marsus com Company, as the official representative of ftp Company, is the authorized distributor of original Big Herdsman ventilators in Iran. Stay with us as we take a closer look at the details, key points, and methods of identifying these differences to ensure a secure purchase.
The weight of the original Big Herdsman ventilator is 82.900 kilograms.
The weight of the fake Big Herdsman ventilator is 72.800 kilograms.
The original ventilator is over 10 kilograms heavier than the counterfeit one.
Weight Comparison:
The original Big Herdsman ventilator, weighing 82.900 kilograms, is over 10 kilograms heavier than the counterfeit version, which weighs 72.800 kilograms. This significant weight difference is often the first and clearest indicator of the lower quality or reduced quantity of materials used in the fake product. The reduction in material or use of inferior substances directly compromises the structural integrity and durability of the ventilator.
A lighter fan may exhibit increased vibration, reduced stability, and a shorter operational lifespan—especially under continuous industrial use. This diminished structural integrity can lead to misalignment of components, increased wear and tear, and potential catastrophic failures, posing serious operational and safety risks.
Such a disparity also reflects a fundamental compromise in the product’s design and manufacturing philosophy.
Body Forming:
In the original ventilator, the body forming (roof, floor, and left and right sides) is different; the roof and floor have distinct forming compared to the left and right sides. In contrast, the counterfeit ventilator’s body forming is uniform across all parts (roof, floor, and left and right sides). This difference in shaping and structural design of the ventilator housing indicates a more complex engineering approach in the original model, likely optimized for structural strength, airflow dynamics, or ease of assembly and maintenance.
The varied forming in the original model likely serves specific practical purposes, such as increasing structural strength in certain areas, improving airflow efficiency by directing air more effectively, or reducing resonance and vibration. The uniform forming in the counterfeit version reflects a cost-cutting measure that ignores these engineering optimizations and potentially leads to reduced strength, increased noise, or undesirable airflow.
The less robust structure is more prone to deformation and fatigue, shortening the ventilator’s service life. This also indicates that the counterfeit manufacturer lacks the engineering expertise or investment required to replicate the functional design of the original and prioritizes ease of production over performance and durability.
Handle Placement:
In the original ventilator, the handle is positioned lower, which facilitates better handling and transportation of the product. In contrast, the counterfeit ventilator’s handle is located in the middle. Although this may seem like a minor detail, it reflects ergonomic design and user-centered considerations in the original model.
Proper handle placement improves the ease and safety of moving heavy equipment and reduces the risk of damage or injury during installation or maintenance. The design of the counterfeit model shows a lack of attention to the practical user experience and safety standards, indicating a broader disregard for quality control and user welfare.
Such design oversights reveal that the counterfeit product is merely a visual copy, lacking the functionality and user experience of the genuine item. This reflects an absence of real product development and testing, which are hallmarks of a reputable brand.
Branding and Logo:
The original ventilator features a logo, with noticeable differences in the lettering, font, and embossing compared to the counterfeit version. In contrast, the fake ventilator lacks a logo entirely. The presence and quality of branding are fundamental indicators of authenticity.
The absence of a logo is a clear and immediate sign of a counterfeit product. This constitutes a direct violation of intellectual property rights and indicates an illegal and unethical manufacturing operation. It also means that the product carries no responsibility or warranty from the original brand.
Consumers who purchase such products face significant risks without any recourse. The lack of branding reflects non-compliance with quality standards, customer support, and any product liability, placing the buyer in a highly disadvantageous position.
Table 1: Overall Physical Features and Authenticity Indicators
For placing orders, receiving consultations, and obtaining more information, you can contact the sales department of Marsus com Greenhouse Industries at 02188333758.
|
Feature |
Original ventilator |
Fake ventilator |
|---|---|---|
|
Weight |
82.900 kg |
72.800 kg |
|
Body forming |
Roof and floor different from the sides |
Uniform on roof, floor, and sides |
|
Handle placement |
Lower (for easier handling) |
In the middle |
|
Logo/Branding |
Has a logo with a distinct design |
No logo |
Thickness of Galvanized Sheets (Body Components):
In most components, the counterfeit ventilator uses thinner galvanized sheets. The most concerning difference is in the fan frame, where the counterfeit version has half the thickness of the original.
Roof sheet: Original: 0.974 mm; Fake: 0.950 mm
Floor sheet: Original: 0.981 mm; Fake: 0.968 mm
Sheet of damper spring frame: Original: 0.777 mm; Fake: 0.780 mm
Central damper sheet: Original: 1.483 mm; Fake: 1.483 mm (One of the few cases with equal thickness)
Left and right side panel sheets: Original: 0.776 mm; Fake: 0.778 mm
Fan frame sheet: Original: 1.193 mm; Fake: 0.594 mm (Important note: In the counterfeit model, the frame tore during stretching due to low thickness)
Damper sheet: Original: 0.747 mm; Fake: 0.783 mm
Thinner sheets are cheaper but inherently weaker. The explicit mention of tearing during stretching of the fan frame in the counterfeit sample indicates the material's inadequacy for the manufacturing process, let alone its ability to withstand operational stresses.
Reduced thickness directly compromises the structural integrity of the ventilator housing and internal components. A weaker fan frame may deform under operational stress, causing misalignment of the fan blades, increased vibration, noise, and reduced airflow efficiency. This also raises the risk of part failures.
Such material compromises lead to significantly shorter operational life, higher failure rates, and increased maintenance needs. The risk of structural collapse or component detachment during operation is a serious safety hazard.
The consistent pattern of using thinner materials across multiple parts suggests an intentional cost-cutting strategy at the expense of product quality and safety.
Thickness of Stainless Steel Fan Blade Sheet:
The thickness of the stainless steel sheet for the fan blade in the original ventilator is 1.169 mm, while in the counterfeit model it is 1.128 mm. Although this difference seems minor, even slight reductions in thickness of critical components can affect performance and durability. Thinner blades are more prone to bending, vibration, and fatigue under continuous high-speed rotation. This can lead to reduced aerodynamic efficiency (less airflow per rotation), increased noise, and premature material fatigue, potentially causing cracks or blade failure. Compromised blade integrity directly impacts the ventilator’s primary function (airflow) and increases the risk of blade failure, which can damage the housing or pose a hazard by throwing parts.
Fan Flange Thickness:
The flange thickness in the original ventilator is 4.952 mm, compared to 4.649 mm in the counterfeit version. The flange is a critical connection point for the fan blades to the central shaft. Reduced thickness means less material to absorb and distribute significant forces generated by the rotating blades. This reduction makes the flange more vulnerable to stress concentration, especially where blades attach. Over time, this can cause cracking, deformation, or complete flange failure, detaching the blades from the drive system. Flange failure is a serious safety concern as it may result in the entire fan assembly separating, causing severe damage to the unit and potential harm to the surroundings or personnel. This highlights a critical design flaw in the counterfeit product that prioritizes material savings over essential mechanical integrity.
Thickness and Weight of the Base Plate Sheet:
The base plate thickness in the original ventilator is 2.209 mm, weighing 3.780 kg, whereas the counterfeit model has a thickness of 1.266 mm and weighs 2.210 kg. The base plate supports the entire ventilator structure. A thinner, lighter base plate in the counterfeit provides significantly less structural support and stability for the entire unit. Reduced mass and thickness mean the base plate has less ability to dampen vibrations caused by the fan and motor rotation. This increased vibration accelerates wear and tear on all connected components, leading to premature fatigue and failure of joints, welds, and the ventilator structure itself. The ventilator will inherently be less stable, potentially causing increased noise, reduced efficiency due to misalignment, and drastically shortened operational life. This is a critical failure point that can jeopardize the entire installation.
Damper Spring Sheet Thickness:
The damper spring sheet thickness in the original ventilator is 1.5 mm, while the counterfeit uses 1 mm with a simple bend. The damper spring is vital for the proper function of the ventilator’s air control mechanism. Thinner materials and simpler bends indicate a weaker spring mechanism. A weaker spring does not provide sufficient tension or consistent operation for the damper. This can lead to improper opening and closing, air leakage when closed, or incomplete opening, directly affecting the ventilator’s ability to regulate airflow and maintain optimal pressure. In a poultry house, precise environmental control is crucial. A faulty damper results in inefficient ventilation, energy waste, and potential moisture problems affecting animal health and productivity.
For placing orders, receiving consultations, and obtaining more information, you can contact the sales department of Marsus com Greenhouse Industries at 02188333758.
Table 2: Comparison of Key Material Thicknesses (Body and Structural Components)
|
Component |
Original ventilator (millimeters) |
Fake ventilator (millimeters) |
|---|---|---|
|
Roof sheet |
0.974 |
0.950 |
|
Floor sheet |
0.981 |
0.968 |
|
Sheet of damper spring frame |
0.777 |
0.780 |
|
Central damper sheet |
1.483 |
1.483 |
|
Left and right side panel sheets |
0.776 |
0.778 |
|
Fan frame sheet |
1.193 |
0.594 |
|
Damper sheet |
0.747 |
0.783 |
Dimensional Accuracy and Engineering Design
This subsection analyzes how deviations in dimensions and design choices in the counterfeit product affect performance, especially airflow and efficiency.
Housing Frame Stretch:
The housing frame stretch in the original ventilator is 8 centimeters (80 millimeters) and is made from 1.2 mm thick sheet metal, whereas in the counterfeit sample it is 6 centimeters (60 millimeters) and made from 1 mm thick sheet. This measurement refers to the depth of the formed frame, which is critical for structural strength and proper fitting of vital components. The counterfeit model has less stretch and thinner material. Less stretch reduces the structural strength of the frame, making it more prone to bending and deformation. It also affects the internal volume and airflow path.
Frame deformation can cause misalignment of the fan blades inside the housing, increasing the gap between blade tips and the frame (as seen in the blade-to-frame clearance). This “leakage” reduces static pressure and overall airflow efficiency, forcing the ventilator to work harder for the same output (or fail to achieve it). Reduced efficiency directly translates to higher energy consumption for a given air volume, increasing operational costs. Additionally, increased stress on the motor and other components due to poor airflow conditions shortens the ventilator’s service life.
Fan Dimensions (Length, Width, Diameter, Blade Height Angle):
The fan blade is the core component responsible for air movement in the ventilator. The fan in the counterfeit model is consistently smaller in all dimensions and has a smaller blade angle.
Fan blade length: Original: 54.5 cm; Counterfeit: 51.8 cm. This 5 cm difference in fan diameter directly impacts the product’s airflow capacity.
Fan blade width: Original: 25.5 cm; Counterfeit: 23.5 cm.
Fan diameter: Original: 127 cm; Counterfeit: 122 cm.
Fan blade height angle: Original: approximately 15 cm (higher airflow, lower pressure drop); Counterfeit: 12.5 cm.
Fan dimensions and blade angle are fundamental for aerodynamic performance. Smaller dimensions and a lower blade angle mean less air is moved per revolution. This directly results in a significant reduction in airflow volume (CFM) and static pressure capability. The counterfeit ventilator moves considerably less air for the same power input or requires much more power to achieve even a fraction of the original's performance. The original’s more radial blades also contribute to higher airflow and lower pressure drop.
In poultry farms, insufficient ventilation leads to poor air quality, heat stress, and moisture problems, negatively affecting animal health, growth rates, and potentially causing mortality. This directly impacts farmer profitability and animal welfare. Simply put, the counterfeit fan cannot effectively perform its intended function and is economically unjustifiable.
Fan Housing Diameter:
The fan housing diameter in the original fan is 129 millimeters, while in the counterfeit model it is 128.5 centimeters (assuming this is a typo and the intended value is 128.5 millimeters). The housing diameter determines the clearance around the fan blades. A smaller housing diameter, combined with potentially incorrect blade dimensions, affects the critical gap between the blade tips and the housing. If the housing is too tight or uneven, it can cause blade scraping or excessive noise. If it is too loose (possibly due to deformation or poor manufacturing precision), it increases “tip leakage,” where air recirculates around the blade tips instead of being pushed forward, significantly reducing efficiency. Any aerodynamic inefficiency results in higher energy consumption to move less air. It also puts unnecessary stress on the motor and bearings, shortening their lifespan.
Blade Flange Connection Width:
The width of the flange connection between the fan blades and the central flange in the original fan is 70 millimeters, whereas in the counterfeit fan it is only 63 millimeters due to narrower blade width. This dimension relates to the contact area between the blade and the central flange. A narrower contact area means the forces generated by the rotating blades concentrate over a smaller surface, increasing stress concentration. This makes the joint more prone to fatigue cracking and failure, especially under continuous dynamic loading on the blades. Failure in this critical connection can cause blade detachment, leading to serious damage and significant safety risks. This highlights poor engineering design in the counterfeit product.
Blade Tip to Housing Gap:
In the original fan, the gap between the blade tip and the housing is approximately 1.1 centimeters, while in the counterfeit model, this gap is about 2.6 centimeters. This is a crucial aerodynamic clearance. The counterfeit fan has a significantly larger gap, allowing a considerable amount of air to recirculate around the blade tips instead of passing effectively through the fan. This phenomenon is known as “tip leakage.” Tip leakage severely reduces the volumetric efficiency and static pressure capability of the fan. For the same power input, the fan moves less air or requires significantly more power to achieve desired airflow (which may be unattainable). This is a major source of energy waste. For a poultry farm fan, this means the system cannot achieve the required air changes per hour, leading to poor air quality, heat stress, and humidity problems. These issues directly impact operational costs and animal welfare. Instead of being an effective ventilation solution, this fan becomes an energy consumer. This data point clearly indicates a fundamental failure in aerodynamic design and manufacturing precision in the counterfeit sample.
Mesh (Wire) Specifications:
The mesh protects both the fan and personnel. The counterfeit model uses a single, lighter mesh with lower strength and wider spacing between wires.
Original: Two mesh panels measuring 133.8 × 66.5 cm each; wire diameter: 2.47 mm; transverse wire spacing: 2 cm; longitudinal wire spacing: 9 cm; weight: 3.860 kg.
Counterfeit: One mesh panel measuring 131.5 × 131.5 cm; wire diameter: 2.15 mm; transverse wire spacing: 2.47 cm; longitudinal wire spacing: 9.88 cm; weight: 2.205 kg.
The counterfeit mesh provides lower protection. Thinner wires and larger spacing make it more prone to bending, breaking, or allowing larger particles to pass through. The single-piece design may also be structurally less robust than two overlapping or reinforced sections. A damaged mesh increases the risk of accidental contact with moving parts or allows foreign objects to enter the fan, potentially damaging the blades or motor. It also means the mesh itself is more vulnerable to damage and requires replacement.
Reduced safety for personnel and increased risk of fan damage from foreign object intrusion directly impact operational safety and maintenance costs. The weight difference (3.860 kg versus 2.205 kg) confirms a significant material reduction, indicating a deliberate compromise on strength.
|
Feature |
Original Fan |
fake Fan |
|---|---|---|
|
Number of screens |
Two pieces |
one pieces |
|
Mesh dimensions |
133.8 x 66.5 cm (each) |
131.5 x 131.5 cm |
|
Wire diameter |
2.47 mm |
2.15 mm |
|
Lateral spacing between wires |
2 cm |
2.47 cm |
|
Longitudinal spacing between two wires |
9 cm |
9.88 cm |
|
Mesh weight |
3.860 kg |
2.205 kg |
For placing orders, receiving consultations, and obtaining more information, you can contact the sales department of Marsus com Greenhouse Industries at 02188333758.
Design of Parts and Assembly Methods
This subsection examines the quality of individual components and the methods used for assembly, revealing compromises that affect durability, maintenance, and long-term reliability.
Types of Fasteners (Blade-to-Flange Connection, Central Column, Mesh Attachment): The selection of fasteners and related hardware reflects engineering integrity and expected load-bearing capacity. The counterfeit sample consistently uses simpler, cheaper, and weaker connection methods and materials.
Blade-to-Flange Connection:
Original: Uses size 6 special rivet screws with stainless steel washers.
Counterfeit: Uses size 6 Phillips screws with lock nuts and no washers.Central Column Fastening:
Original: Uses 2 size 10 nuts, 2 size 10 Allen screws, 2 size 10 spring washers, and a plastic piece under the column.
Counterfeit: Uses 2 lock nuts and 2 size 10 Phillips screws.Mesh Attachment:
Original: Uses size 6 self-tapping screws, plastic clips, 2 special flat metal washers, a convex metal washer, and screws.
Counterfeit: Uses size 5 self-tapping screws and small plastic clips.
Fastener Materials (General):
Original: Uses stainless steel rivets and steel connectors at critical points.
Counterfeit: Uses aluminum rivets and completely galvanized connectors.
Washers (especially spring washers) and special rivets/Allen screws are designed to distribute loads, prevent loosening due to vibration, and create secure, durable joints. Phillips screws and simple lock nuts have less resistance to loosening under vibration and may not provide sufficient clamping force.
Aluminum rivets are weaker than steel. Low-quality fasteners loosen over time due to continuous vibration and operational stress, causing misalignment, increased noise, and premature wear. This increases the need for frequent tightening and raises maintenance burdens or risks parts detaching.
Use of aluminum rivets in critical areas (where steel is used in the original) indicates a significant compromise in structural strength and corrosion resistance. Loose or damaged fasteners can cause catastrophic part failures, such as blade detachment or structural collapse, creating serious safety risks for personnel and equipment.
This highlights a fundamental neglect of best engineering practices and long-term reliability in the counterfeit product.
Key Differences and Their Implications
- Compromised Performance: Smaller fan blades, incorrect pulley ratios, and increased gaps between the blade and housing significantly reduce airflow and efficiency. This results in inadequate ventilation and higher energy consumption. For example, the larger blade-to-housing gap in the counterfeit sample (2.6 cm compared to 1.1 cm in the original) alone can drastically reduce aerodynamic efficiency, causing significant energy waste and failure to maintain optimal environmental conditions in poultry farms.
Reduced Durability and Lifespan: The cumulative effect of thinner materials, poor-quality fasteners, and the absence of critical protective features (such as bearing moisture protection and motor cooling) leads to premature wear, frequent failures, and a much shorter operational life. For instance, the base plate thickness in the counterfeit sample is nearly half that of the original (1.266 mm vs. 2.209 mm), directly affecting overall stability and vibration resistance, resulting in early structural fatigue.
Increased Maintenance and Operational Costs: Frequent repairs, replacements, and manual adjustments (such as belt tensioning) due to design flaws and low-quality materials lead to higher total ownership costs. The absence of an automatic belt tensioner in the counterfeit model means repeated manual adjustments are needed, increasing maintenance time and expenses.
Significant Safety Risks: Risks arising from structural instability, potential part detachment, motor overheating, and lack of warning labels endanger personnel and assets. The use of aluminum rivets and galvanized fasteners at critical points in the counterfeit sample, compared to steel rivets and fasteners in the original, directly reduces joint strength and increases the risk of part failure.
Lack of Quality Assurance and Accountability: The absence of branding, proper manufacturing processes, and adherence to engineering standards indicates that the counterfeit product offers no guarantees, warranties, or support, leaving the buyer fully exposed to risk.
For placing orders, receiving consultations, and obtaining more information, you can contact the sales department of Marsus com Greenhouse Industries at 02188333758.
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