Quick guide: Small HVAC Components for your Design.

HVAC Components

Creating a more energy-efficient HVAC system is a pressing challenge for manufacturers and design engineers. While saving customers money is important, the primary focus lies in reducing the environmental impact of HVAC operations.

When designing HVAC systems, it's essential to consider not only major components but also the significance of smaller parts. These lesser-known components play a crucial role in ensuring optimal performance and desired efficiency.

To shed light on these overlooked yet vital components, we've compiled a comprehensive guide. It's important to note that HVAC systems vary widely, from commercial to residential to industrial applications. Design considerations must align with the specific needs of the space being serviced.
To facilitate your design process, we offer free samples of most solutions and downloadable CAD files to assist in project planning.

Key components of an HVAC system include:

1. Furnace:
Serving as the heating source, furnaces come in various types, such as gas, oil, or electric. They utilize combustion chambers or heating elements to generate heat efficiently.

2. Ducts:
Typically constructed from aluminum, ducts distribute heated or cooled air throughout the building, ensuring proper ventilation and air distribution.

3. Heat Exchanger:
This component, present in all furnace types, heats air as it passes through, utilizing combusted fuels or electric heating elements.

4. Blower Motor: 
Responsible for circulating conditioned air through ducts, blower motors are integral to distributing air evenly throughout the building.

5. Air Filters:
Essential for maintaining indoor air quality, filters remove dust and particles from recycled air before it returns to the furnace for reconditioning.

6. Condenser:
An essential part of air conditioning systems, the condenser cools refrigerant gas, which then circulates back indoors to produce cold air.

7. Evaporator Coil:
Situated outside the furnace, the evaporator coil absorbs heat from indoor air, cooling it before redistributing it through ducts.

8. Thermostat:
Controlling the system's temperature, thermostats ensure comfort and energy efficiency by signaling heating or cooling as needed.

It's crucial to pair new furnaces with compatible thermostats to optimize variable heating and distribution capabilities. By prioritizing these components and their efficient integration, HVAC systems can achieve significant improvements in both energy efficiency and environmental impact.

Let's delve into the essential small components that play a pivotal role in the functionality of HVAC units:

HVAC Thermostat and Control Panel:

At the core of HVAC systems, these components serve as the central command. They dictate instructions to other major components, necessitating consideration of PCB hardware components for proper wiring.

i. Non-Threaded Ceramic Spacer:
These ceramic spacers are manually installed without assembly equipment. They boast an impressive operating temperature range from -40°C to 1,700°C, ensuring durability and reliability.

ii. PCB Support Pillars:
Thin and flexible, these PCB spacers securely snap and lock in place. They can be easily flexed back for maintenance or repair post-installation. Crafted from Nylon 6/6, they are UL94 V-2 rated, with an operating temperature range spanning from -40˚C to 85˚C.

iii. Transistor Insulators:
Designed to offer low resistance to heat transfer while providing electrical insulation, these insulator pads ensure the efficient operation of power devices while safeguarding against metal parts.

iv. Non-Threaded Round PCB Spacers:
Manually installed, these round spacers eliminate the need for assembly equipment. Available in various materials, including nylon 6/6, and offered in a diverse range of sizes to suit specific requirements.

v. Fan Filter Sets:
Comprising components such as a fan guard, filter cover, mesh sheet, and felt filter, these sets are IP30 rated, offering protection against tools and wires greater than 2.5mm in diameter.

vi. LED Lens Holders:
Engineered to accommodate LED lights in HVAC control panels, these holders transmit light at a 10˚ angle while ensuring robustness with strong polycarbonate construction. Available with or without a sealing o-ring, they can withstand temperatures ranging from -40˚C to 130˚C.

By integrating these meticulously designed small components into HVAC units, optimal functionality and efficiency can be achieved, contributing to enhanced performance and reliability.


When incorporating a thermostat to synchronize with another unit on a control panel for your furnace, please refer to the Thermostat and Control Panel section provided above for detailed insights.

i. Stainless-Steel Cable Ties:
For industrial HVAC applications, 316 stainless-steel cable ties present an optimal choice, offering exceptional strength and durability. These ties feature a self-locking mechanism and can be effortlessly installed by hand. Resilient to extreme temperatures, they serve as an excellent solution for securing components, including the blower.

ii. Cable Tie Gun – Stainless Steel Ties:
Facilitating swift and convenient installation of stainless-steel cable ties, the cable tie gun streamlines the process. By squeezing the two handles together, it loops the tie securely, imparting tensile strength for a reliable fastening around cables.

iii. Aluminum P-Clamps for Cables:
Perfect for securing, grounding, and routing cables, aluminum P-clamps provide versatile functionality. Available for various bundle sizes ranging from 3.2mm to 31.8mm, they securely mount with a #10/M5 screw or equivalent fastener. Additionally, this style is available as a nylon cable clamp, offered in UL94 V-2 and UL94 V-0 rated materials for enhanced safety.

iv. Cable Strap – Nylon Roll:
Featuring a two-part design with a locking button, the nylon roll cable strap offers exceptional flexibility in cable management. Available in elastomer or black nylon 6/6 variants, these straps enable easy bundling and securing of cables. UL94 HB rated, they ensure reliable performance while adhering to safety standards.



When it comes to HVAC duct systems, it's crucial to incorporate components that facilitate easy support for the ducts. Here are some solutions designed to streamline the process:

i. Self-Drilling and Self-Piercing Screws - Pan Head:
Featuring a pointed head style, these pan head self-drilling screws are engineered to tap into panels effortlessly, expediting the assembly of duct fittings. Crafted from cost-effective mild steel, these screws offer a quick and easy solution for securing duct components.

ii. Cable Tie Gun:
Ideal for cable ties with widths up to 10.0mm, the cable tie gun is tailored to enable installers to tighten ties around cable bundles swiftly and seamlessly in a single motion. This tool enhances efficiency during duct installation, ensuring a hassle-free process.

3.Heat Exchanger

When addressing the components within your heat exchanger compartment, it's essential to consider their maximum operating temperature, particularly as a furnace heat exchanger can reach temperatures of up to 170˚F.

i. Braided Cable Sleeve:
Designed to safeguard cables and wires from potential damage while offering cushioning against vibrations, braided cable sleeves are a reliable choice. These sleeves are resilient to dissipating heat and moisture, available in various materials such as nylon 6/6 with an operating range of -60˚C to 160˚C, and polyester with an operating temperature range of -50˚C to 150˚C.

ii. Cable Wrap - Spiral:
A lightweight and protective solution, spiral cable wrap provides cost-effective protection for hoses and cables. It allows for flexible routing of cables within the bundle, ensuring organized and clear spacing. Available in heat-stabilized nylon with an operating temperature range of -50˚C to 150˚C, and polyethylene and LDPE with a range of -40˚C to 85˚C.

iii. Heat-Stabilized Nylon Cable Ties:
Suitable for areas exposed to heat, such as the heat exchanger, heat-stabilized nylon cable ties offer durability and reliability. Rated UL94 V-2, these ties can withstand temperatures ranging from -40˚C to 200˚C, ensuring secure fastening even in demanding conditions.

iv. Side Pull Plugs:
Essential for protecting open ports from contamination and damage during transportation and storage, side pull plugs offer comprehensive protection solutions. Whether it's center-pull plugs or snap-fit plugs, Essentra provides a complete range of options. These plugs are also well-suited for use in condensers, ensuring the integrity of components throughout their lifespan.


4. Blower motor

When addressing the blower motor in HVAC systems, it's crucial to mitigate vibration, which can lead to noise disturbances. Here are some solutions to consider for reducing noise and enhancing performance:

i. Shoulder Screws and Vibration Mount Grommets:
These components work in tandem to absorb vibrations and minimize noise. Shoulder screws, crafted from zinc-plated carbon steel, along with neoprene rubber grommets, effectively dampen vibrations. The grommets boast an operating temperature range of -40˚C to 50˚C, ensuring durability and reliability in varying conditions.

ii. Vibration Mount Standoffs:
Designed not only for blower motor compartments but also for HVAC compressor components in the condenser, vibration mount standoffs play a crucial role in noise reduction. By absorbing vibrations, these standoffs act as a buffer, minimizing noise transmission through ducts. Constructed from neoprene rubber and steel, they offer resilience and stability, with an operating temperature range of -40°C to 80°C.

iii. Hook and Loop Cinch Straps with Plastic Buckle:
Ideal for securing blower motor components, nylon-woven straps with hook and loop closure systems provide a secure hold while allowing for easy release and resealing as needed for maintenance. Available in widths of 24mm, 28mm, and 33mm, these cinch straps ensure cables are held together securely without compromising accessibility for maintenance tasks.


When considering HVAC condenser components, it's essential to explore their versatility for use in other parts of your design. Here are some solutions that offer multifunctional benefits:

i. Hook and Loop Rolls:
Available in convenient rolls that can be cut to the desired length, hook and loop rolls provide a secure hold for cables while allowing for easy release and resealing when necessary. Made of LDPE, these rolls offer durability and reliability with an operating temperature range of -17˚C to 104˚C. They are also suitable for use with the HVAC's blower motor. For additional organization, consider utilizing hook and loop cable ties, which can be color-coded for enhanced identification.

ii. Cable Tie Mounts - Edge Mount:
Designed to provide strong retention force when attached to the side of the HVAC's metal panel, edge mount cable tie mounts allow for secure cable management. Constructed from Nylon 6/6 with a grip material made of 304 stainless steel, these mounts offer durability and reliability, with a UL94 V-2 rating for fire resistance. Adhesive cable tie mounts are also available as an alternative option for secure attachment.

iii. T-Bolt Clamps:
T-Bolt hose clamps offer a reliable seal for industrial drain-tube assemblies located outside the condenser. Especially suited for applications with high vibration, such as those found in industrial HVAC systems, these clamps ensure dependable performance. Constructed from 301 stainless steel, they provide durability and stability. For non-industrial HVAC systems, plastic hose clamps may be a more suitable alternative depending on specific requirements.


6. Evaporator coil

To safeguard your cables as they traverse between panels, it's essential to utilize grommets for protection. Additionally, standard cable ties play a crucial role in securing cables effectively. Here's a brief overview:

- Standard Cable Ties:
Crafted from durable nylon 6/6, standard cable ties are designed with a built-in lock system to prevent accidental removal. These high-quality plastic ties ensure secure cable management, offering reliability and peace of mind. Rated UL94 V-2, they meet stringent safety standards, making them ideal for various applications.


7.HVAC housing

When assembling panels for residential, commercial, or industrial HVAC systems, it's essential to have a diverse array of components at your disposal. Here's a comprehensive list of components to consider:

3D-Adjustable HVAC Hinges:
These hinges enable three-dimensional adjustments on large flush-fitting doors, enhancing flexibility in installation. Additionally, free-swinging hinges, such as leaf hinges, offer heavy-duty security with concealed mounting screws to prevent external access.

Functional Locking Hinge:
Combining a hinge and compression lock/latch, this component allows for easy assembly and adjustment of doors, ensuring tight sealing to prevent leaks or facilitate convenient door removal. Ideal for industrial and commercial HVAC systems, it's crafted from nylon with a stainless steel pin.

L-Handles and T-Handles:
Available in various styles, these handles offer secure access to panels. For optimal sealing under vibration conditions, consider using NEMA-rated adjustable L-handles with compression.

Cable Conduit - PVC-Coated Metal:
Flexible plastic conduit provides protection for power and control wires, supporting PVC-coated galvanized steel conduit systems. Offering high mechanical strength and liquid tightness, it's suitable for outdoor use.

Sealing Gaskets:
Bubble gasket seals enhance sealing and noise dampening from vibrations, protecting against humidity and dirt ingress. Available in EPDM and PVC, weather stripping tape and gasket tape can also be used for this purpose.

Recessed Handles:
Plastic recessed handles snap easily into place, ideal for safety concerns and avoiding sharp edges. Made of acrylonitrile butadiene styrene (ABS), they are suitable for indoor HVAC use.

Blind Plastic Rivets:
Also known as clinch rivets, these secure locking mechanisms work with various panel thicknesses without soldering. Easy to install, they are made of nylon 6/6 with an operating temperature range of -40˚C to 85˚C.

Anti-Vibration Mounts - Heavy-Duty Industrial:
These mounts reduce shock and vibration by up to 80%, with a large support plate providing precision leveling and preventing walking or slipping out of position. Made of rubber and steel, they are ideal for commercial and industrial HVAC systems.

Standard Hex Nuts - Metal:
Used with various fasteners, these nuts are easy to fasten or loosen due to their hexagonal shape. Available in mild steel or stainless steel to resist corrosion, they can be used with single wave spring washers for added friction.

High-Bond Tape Rolls:
High-performance acrylic-foam-core tapes offer excellent resistance to temperature cycles, suitable for bonding dissimilar metals and replacing welding. Available in clear, white, grey, and black, with an operating temperature range of -28˚C to 148˚C.

Standard Grommets:
Essential for protecting cables passing between compartment panels, these snap-in grommets are available in various materials such as PVC, TPE, EPDM, and thermoplastic rubber.

Cable Glands - Straight:
Providing entry for cables into the HVAC system, these strain-relief cord grips come in various thread sizes, colors, and mounting thread options. Made of nylon, cable gland locknuts may also be required.

Vibration Mounts - Heavy Duty:
Screw-on vibration mounts absorb shock and reduce noise, providing high adhesion to the floor. Made of TPE, they are suitable for use as feet for HVAC equipment.

Inspection Windows:
Thick-framed windows allow viewing of counters, dials, and instruments from the outside, enhancing accessibility and monitoring. Made of strong polycarbonate, they ensure durability and visibility.

Pull Handle:
Mounted with a rectangular grab-style handle, this one-sided pull handle offers ease of use and durability. Made of nylon 6 reinforced with 30% glass fiber, it provides reliable performance.

Panel Clamp:
Available in asymmetrical and symmetrical designs, this bridge clamping system facilitates complete panel removal when necessary. Made of nylon 6 reinforced with 30% glass fiber, with a steel screw, it ensures secure fastening and stability.

We are proud partners of Essentra Components, supplying all the smallest but vital components since 1960

Talk to our team today to arrange a quotation on your Essentra Components requirements. Get in touch with us to know more Call Us at (01) 453 5511 or email  info@oharecomponents.com

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