For Parts 1 & 2 Air Filtration under Feature 05, which documentation is required?

• A. LOA from Contractor
• B. LOA from MEP Engineer & Spot Check
• C. Spot Check
• D. LOA from MEP Engineer

Answer: (B)

Documentation for Parts 1 & 2 Air Filtration requires a Letter of Assurance from the MEP engineer along with a Spot Check. The Letter of Assurance from the MEP engineer confirms that the filtration design and specifications meet the project’s requirements and are prepared by a licensed professional responsible for the mechanical systems. The Spot Check provides on-site verification that the installed filtration components match the design and are installed correctly, ensuring the system will perform as intended in practice. Having both pieces ensures there is both design validation and field verification.

Relying on a contractor’s assurance alone would miss the professional engineering review. A standalone Letter of Assurance from the MEP engineer without on-site verification could overlook field discrepancies, while a Spot Check without engineering validation could miss whether the design itself met the required criteria. The combination of the MEP engineer’s Letter of Assurance and the Spot Check covers both design integrity and on-site implementation.