This type of specification spells out a product by name and model number.

Proprietary specifications are those that clearly define a product by its specific name and model number. This type of specification is often used when a particular product is required due to its unique characteristics or performance capabilities that meet the project's particular needs. By specifying a product in this manner, it ensures that the contractor will use the designated manufacturer's product, thus maintaining consistency in quality and performance in the project.

This type of specification is particularly useful in projects where the performance and reliability of fire alarm systems are critical. It helps to eliminate ambiguity, providing clarity on what is expected in terms of equipment to be installed. The use of proprietary specifications can also aid in simplifying the bidding process, as all contractors will be providing the same specified product, making it easier to compare proposals on an equal basis.

In contrast, performance specifications focus on the desired outcomes and functionalities rather than specifying particular brands. Generic specifications may outline a category of products but do not list specific names or model numbers. Open specifications allow for a broader range of products that meet certain criteria, rather than narrowing it down to a specific brand or model. Thus, proprietary specifications are essential for ensuring that specific products are used throughout a project.