Building Systems Integration Flashcards

What is the primary purpose of a building's vapor retarder?

Answer: To limit moisture diffusion through the building envelope

A vapor retarder resists the diffusion of water vapor through wall, roof, or floor assemblies to prevent condensation within the construction.

Which lighting control strategy reduces energy use by automatically turning off lights when a space is unoccupied?

Answer: Occupancy Sensor Control

Occupancy sensors detect motion or presence and switch lights off after a set period of inactivity, directly reducing wasted energy.

A building's domestic hot water recirculation loop serves what function?

Answer: Ensures hot water is immediately available at fixtures without waiting

A hot water recirculation loop continuously circulates hot water through the distribution piping so users get hot water instantly without wasting cold water.

What is the purpose of electrical grounding in a building system?

Answer: To provide a safe path for fault currents and protect people from electric shock

Grounding connects electrical equipment to earth, giving fault currents a low-resistance path that trips breakers instead of passing through people.

Which system provides ventilation air specifically to meet ASHRAE 62.1 minimum outdoor air requirements?

Answer: Dedicated Outdoor Air System (DOAS)

A DOAS handles only ventilation air, conditioning 100% outdoor air to meet code minimums independently of the space conditioning system.

In acoustic design, what does 'STC' (Sound Transmission Class) measure?

Answer: A partition's ability to reduce airborne sound transmission between spaces

STC rates how well a wall, floor, or ceiling assembly reduces airborne sound transmission; higher values indicate better isolation.