Why standard pressure relief vents are your best choice

Standard pressure relief vents are proven, tested products with clearly defined performance. Their design, opening pressure, and airflow capacity have already been validated. This makes them a reliable and predictable choice for most applications. As a result, they are easier to specify and reduce the amount of engineering work required.

When standard venting solutions are considered early in the design process, architects and engineers can plan around them. Wall openings, structural elements, and installation details can be designed to match standard vent sizes and configurations. This makes the installation simpler and avoids unnecessary complications later in the project.

In this article, we explain why standard venting solutions should always be the first option considered and how they improve project design. We also discuss when bespoke solutions may be required.

Standard pressure relief vents: Your first choice

When it comes to pressure relief vents, standard venting solutions should be the first option considered for almost any project. These products are designed and tested to meet common requirements, offering a reliable and predictable solution without the complexity or risk of bespoke designs.

What makes a vent “standard”?

Standard pressure relief vents have clearly defined characteristics that make them easy to specify and integrate:

• Standard sizes. Standard pressure relief vents are often available in two to six different sizes.
• Fixed materials. Commonly available in durable options such as galvanized steel or stainless steel, chosen to suit most environments.
• Standard mounting. Ready to install with proven frame and mounting solutions.
• Tested and approved. Their opening pressures, airflow performance, and structural reliability have been validated.

By using these predefined parameters, architects, and engineers can be confident that the vents will perform as expected, avoiding the uncertainty that can come with bespoke solutions.

Key advantages of standard venting solutions

Choosing standard venting solutions provides several clear benefits:

• Proven performance. Fully tested and approved designs ensure reliable operation under pressure events.
• Quick availability. Standard products are typically in stock, reducing lead times and keeping projects on schedule.
• Cost-effective. Avoid the additional design, manufacturing, and testing costs associated with bespoke vents.
• Reduced engineering effort. Standard dimensions, materials, and mounting options simplify specification and integration into building design.
• Suitable for most applications. For the vast majority of rooms and enclosures, standard vents meet both pressure relief and structural integrity requirements.

Why standard should be the default

By planning for standard venting solutions early in a project, designers can align room dimensions, wall thicknesses, and installation details to match readily available vents. Planning early helps avoid last-minute design changes that would require a custom solution, which is usually pricier, takes longer to deliver, and carries additional risks.

Standard venting solutions combine safety, efficiency, and predictability, making them the logical first choice for almost every application.

Configurable standard solutions for flexibility without risk

While standard venting solutions are suitable for most applications, some projects may require minor adjustments to fit specific building conditions. Configurable standard solutions allow these modifications while keeping the vent fully tested and approved. They provide flexibility without the risks associated with bespoke designs.

What can be configured?

Several adjustments can be made to standard vents to suit installation requirements:

• Installation adapters. Z-frames for thin walls and wall extensions for thicker walls. These are usually available as ready-to-use kits for many pressure relief vents.
• Floor or ceiling mounting. Standard vents can be adapted for vertical or horizontal mounting using pre-designed mounting kits. 
• Motorisation. Some vents can be supplied with motorised operation for controlled or automated opening. Kits for motorisation are designed to integrate seamlessly with standard vents.
• Colour customisation. Standard vents can be painted to match building aesthetics. 
• Materials. Standard vents can be produced in different materials, such as galvanized steel, 304 stainless steel, 316 stainless steel, or aluminium, to suit the environment and application without affecting tested performance.

Maintaining tested performance

All configurable options are designed to preserve the approved performance of the vent. Installing a Z-frame, wall extension, or motorisation kit does not affect airflow, opening pressure, or structural reliability. This is a key advantage over bespoke vents, where modifications may require additional testing to ensure safety and compliance.

Configurable standard solutions are ideal when small adaptations are needed. They allow designers to accommodate building conditions while maintaining the efficiency, safety, and reliability that come with standard venting solutions.

Lead times

One of the advantages of configurable standard venting solutions from AFP is that many adjustments are ready-made and available as kits, meaning they typically do not add extra lead time. For example, we offer standard kits for our most popular vents with:

• Wall liners and Z-frames
• Floor or ceiling mounting
• Motorisation

While many configurable options are available as ready-made kits, some of the customisations we offer will add extra time to delivery. For example:

• Colour customisation. Painting vents in different colours will add at least two weeks to the standard delivery time.
• Non-standard materials. Producing vents in materials outside the standard options require extra production time and might take up to 12 weeks to deliver.

Please get in touch for specific lead times to help your project team plan installations efficiently. 

Custom solutions as a last resort

While standard and configurable venting solutions meet the needs of most projects, there are exceptional situations where a fully custom vent may be required. In general, custom solutions should be considered a last resort. They often involve higher costs, longer lead times, and additional design and testing requirements. Compared with standard products, bespoke designs can also introduce additional project risk and liability.

When custom solutions are needed

Fully custom vents are typically only required in specific or constrained situations, for example:

• Replacing systems in protected or existing buildings where the external structure cannot be adapted. In these cases, the vent size may need to match existing wall openings that cannot be modified.
• Blast and pressure relief solutions for substations, where a vent is ducted from a switchgear unit. The vent size may need to match the dimensions of the ducting connected to the equipment.

In cases like these, a bespoke vent may be the only practical solution. However, whenever possible, designing around standard venting solutions remains the safest, fastest, and most cost-effective approach.

Downsides of Custom Solutions

While custom vents can solve these unique challenges, they come with clear disadvantages:

• Longer lead times. Manufacturing bespoke units takes more time than standard products.
• Higher costs. Custom design, and testing add to project expenses.
• Additional risk. Unproven designs may require extra validation and can increase liability.
• More engineering effort. Specifications, approvals, and integration must be carefully managed to ensure compliance and performance.

Because of these factors, custom vents should only be specified when no standard or configurable option can meet the project requirements. For nearly all other applications, standard venting solutions provide a faster, safer, and more cost-effective choice.

AFP is here to help 

Choosing the right pressure relief vent can be challenging, especially when balancing building requirements, environmental conditions, and system performance. We can help you make the right decision.

With our wide range of pressure relief vents, we offer solutions for virtually any environment. Whether your project involves extreme cold or extreme heat, high humidity, strong winds, or challenging indoor conditions, we have a standard or configurable vent available to meet your needs.

Our team of experts can provide guidance on:

• Selecting the appropriate standard or configurable vent for your application.
• Understanding which vents are suitable for your specific environmental conditions.
• Determining if a custom solution would be required.

By contacting AFP early in the design process, you can ensure that your project uses the most reliable, tested, and efficient pressure relief solution.

Get in touch to discuss your requirements and find the vent that fits your situation perfectly, while saving time, cost, and reducing project risk.