HVAC fans and blowers move air in Heating, Ventilation, and Air Conditioning (HVAC) systems. They are an essential component of air handling systems, which bring or draw fresh air into buildings. HVAC fans and blowers can be installed on an outside wall or installed above the ceiling, or they can be utilized as part of a ducted system. An electric motor rotates or turns the Fan or Blower, providing unidirectional air flow. The air is frequently pre-heated or cooled.

It’s crucial to comprehend how various models of the fan operate because it’s a crucial part of a HVAC system. There are differences in efficiency, cost, and loudness across the spectrum, and ultimately, the wrong fan for the task could lead to low efficacy and increased overheads.

According to MDPI, There’s An Overview on Sustainability of Heating, Ventilation and Air-Conditioning (HVAC) Systems.

In our blogpost, we mention the types of HVAC fans that are used across several industries.

Different Types of Fans Used in HVAC Systems

1). Axial Fans as Types of HVAC Fans

Image source⁚ SYMBIOSIS Blowerfab

The blades of Axial Fans are mounted parallel to the direction of the rotor axis. Axial fans in an HVAC system are used for cooling or diluted ventilation. These can be powered by either AC or DC.

Axial fans are the simplest to build, with propeller-shaped blades and a spinning shaft. These HVAC systems are meant for places with low airflow and static pressure, and so are not suited for applications with significant resistance or static pressure. Applications of axial fans are cooling combustion engines, cooling electronic components, and outside air conditioner.

Axial fans are used as an important HVAC fans system across several industries. Including, smelters, steel mills, foundries, boiler making industries, laundries, brick klins, glass works, textiles, bakeries, and power stations.

Different types of Axial Fans used in HVAC Systems:

  • Bifurcated Fans: These fans are used to manage hazardous air and have engines located outside of the air stream.
  • Flame Proof Fans: These fans are extensively used in fire hazard areas.
  • Roof Extractor Unit: These fans are used on the roof to extract and exhaust contaminated air.
  • Belt Driven Fan: These fans are driven by belt and pulley arrangement and the motor is located outside the air stream.
Image source⁚ SYMBIOSIS Blowerfab

2). Centrifugal Fans as Types of HVAC Fans

Centrifugal Fans have blades that are 90 degrees to the rotor’s axis. These fans are ideal for producing large amounts of air for cooling and ventilation purposes. Centrifuge action is used by these fans to enhance the volume of air and offer high-pressure, high-volume air output.

The major applications for centrifugal fans as a component in an HVAC system include pushing air into air duct systems. These fans are powerful enough to deal with the high static pressure found in ductwork. In exceptionally demanding applications, a variable frequency drive can be used to supplement the direct drive or belt drive.

Centrifugal fans are extensively used as HVAC fans in several industries like Textiles, Telecom, Mining, Glass Factories, Food Industries, etc.

Different types of Centrifugal Fans used in HVAC Systems:

  • Backward Curved Aerofoil Type: It can be employed in medium to high-pressure industrial applications that require clean air or low dust concentrations. Four distinct series for various wheel types provide selection versatility. Because of the double-skin airfoil, the blades are susceptible to abrasive dust and should only be used in low dust loads.
  • Backward Curved Blower: It can be utilized for clean air or medium concentrations in industrial applications with medium to high pressures. 9 distinct series for various wheel types provide selection freedom. This design was created to meet the most stringent process requirements and is the recommended option for the vast majority of applications.
  • Backward Inclined Type: This fan family is designed for high volume, medium pressure, and high temperature applications. 5 distinct series for various wheel designs provide selection freedom. Because of its intrinsic blade geometry, this design is well suited for demanding process needs and is easily replaceable/maintainable.
  • Radial Bladed Type: This fan is designed for low to medium volume, high pressure applications, and high temperature needs. Six different series for various wheel types provide selection versatility. Because of its intrinsic blade shape, this design is well suited for harsh process needs and is easily replaceable / maintenance.

Conclusion of HVAC fans that are used across Industries.

The precise type of the HVAC fan required can only be determined by the application and budget. Although centrifugal and backward-inclined fans are more effective, you must consider whether this is necessary, or whether it matches your exact needs. For example, if air quality is more important than circulation, purifiers may be a better option than HVAC systems.

The quality of fans should be one of the first concerns to ensure performance and durability. That is why you should buy industrial fans for HVAC systems from reputable industrial fan manufacturers like BlowerFab. We are an experienced industrial fan manufacturers in Surat. Give a look at our Industrial Fans suitable for every industrial needs.

Talk to our experts here.