The Fundamental Commissioning and Verification prerequisite requires commissioning of the

building’s mechanical, electrical, plumbing, and renewable energy systems and assemblies. While

the building envelope is not typically commissioned, it must be included in the owner’s project

requirements (OPR) and basis of design (BOD), and its design must be reviewed.

Reference: The LEED v4.1 reference guide for Interior Design and Construction outlines the scope of

commissioning process activities, which includes the requirement for exterior enclosures to be

limited to inclusion in the OPR and BOD, as well as the review of the OPR, BOD, and project design12.

In the context of LEED AP Interior Design + Construction V4, regularly occupied spaces are areas

where people spend a significant amount of time on a regular basis. Conference rooms fit this

definition as they are designed for occupants to gather for extended periods for meetings and

collaborative work.

Reference: The LEED v4 for Interior Design and Construction reference guide defines regularly

occupied spaces as areas where people spend a significant portion of their time1. This can include

spaces where people work, meet, or live. The guide further categorizes occupied spaces as individual

or shared multi-occupant based on the number of occupants and their activities2.

The composting toilet is applicable to the Water Efficiency Credit, Indoor Water Use Reduction for

LEED Interior Design and Construction: Commercial Interiors because it significantly reduces the

amount of water used for conventional flushing toilets. By composting human waste, this system

eliminates the need for water in the disposal process, contributing to indoor water use reduction.

Reference: The LEED v4 Reference Guide for Interior Design and Construction includes the

composting toilet as a strategy for reducing water use within the indoor environment1. The LEED v4

Indoor Water Use Reduction Calculator also provides a framework for calculating water savings,

where the use of composting toilets can contribute to achieving the prerequisite and credit

requirements for water use reduction1.

The use of plug-in devices can affect the Energy and Atmosphere Prerequisite, Minimum Energy

Performance, as this prerequisite requires the establishment of a building’s energy performance that

includes the energy consumption of all plug-in devices. These devices can significantly impact the

overall energy usage and therefore influence the strategies to meet the minimum energy

performance standards1.

Reference:

LEED v4 for Interior Design and Construction Reference Guide2.

LEED Credit Library - Energy and Atmosphere3.

Minimum Energy Performance Prerequisite Information1.

The use of plug-in devices can have a significant impact on a building's energy profile, especially

when considering the Indoor Environmental Quality Credit for Thermal Comfort within the LEED AP

Interior Design + Construction framework. The Energy and Atmosphere Prerequisite, Minimum

Energy Performance, is affected by the use of plug-in devices because these devices contribute to

the building's overall energy consumption. This prerequisite requires projects to establish a

minimum level of energy efficiency for the proposed building and systems. Plug-in devices can alter

the thermal load and energy usage patterns within a space, thereby influencing the strategies

employed to meet thermal comfort requirements. For instance, excessive use of personal heating or

cooling devices might indicate inadequacies in the HVAC system's ability to provide comfortable

conditions, which could affect the energy modeling and performance metrics required to comply

with this prerequisite. It's crucial for the design team to account for the energy impact of plug-in

devices in their energy modeling and ensure that the building's systems can meet occupants' thermal

comfort needs efficiently.

According to the LEED AP ID+C reference guide, for the purpose of achieving the Indoor

Environmental Quality Credit under Enhanced IAQ Strategies, CO2 monitoring should be

implemented in all densely occupied spaces1. The public areas of a hotel, including the front desk,

lobby, restrooms, and corridor, are typically not considered densely occupied spaces. Therefore, a

single CO2 monitor in a central location like the lobby could suffice for the entire public area to meet

the requirements of the credit.

Reference:

LEED v4: Interior Design + Construction Guide1.

Enhanced Indoor Air Quality Strategies, LEEDuser1.

Advanced Energy Metering is the credit that works synergistically with the Energy and Atmosphere

Credit, Enhanced Commissioning. This is because Advanced Energy Metering involves the

implementation of submetering systems that provide data on the building’s energy use. This data is

crucial for the ongoing commissioning process to ensure that the building’s systems are operating as

intended over time. The data helps in identifying opportunities for energy savings and ensures that

energy conservation measures continue to perform optimally12.

Reference:

LEED v4 for Building Design and Construction Guide3.

LEED Credit Library - Energy and Atmosphere4.

Advanced Energy Metering Credit Information1.

:

To achieve the Materials and Resources Credit for Building Product Disclosure and Optimization -

Material Ingredients, a product can demonstrate material ingredient optimization through the

GreenScreen v1.2 Benchmark. This method involves a screening process to assess the hazards of

chemicals used in products and aims to reduce the use of chemicals that are harmful to human

health and the environment1.

Reference:

LEED v4.1 reference guide for Interior Design and Construction, specifically the section on Building

Product Disclosure and Optimization - Material Ingredients2.

“ULTIMATE GUIDE TO LEED V4 & V4.1 MRc4 Option 2” by Green Badger, which details the

requirements and strategies for achieving Material Ingredient Optimization in LEED v4.11.

The Water Efficiency Prerequisite for Indoor Water Use Reduction in LEED AP ID+C V4 focuses on

reducing the aggregate indoor water consumption by 20 percent from the baseline. This includes

water usage by appliances such as residential clothes washers and dishwashers, which are common

contributors to indoor water use.

Reference: The LEED v4 Indoor Water Use Reduction Calculator provides guidance on the baseline

water consumption for various fittings and fixtures, including residential appliances1. Additionally,

the LEED v4: Interior Design + Construction Guide outlines the requirements for achieving the

prerequisite, emphasizing the reduction of indoor water use through efficient appliances2.

In the Water Efficiency Prerequisite for Indoor Water Use Reduction, the focus is on reducing potable

water usage through efficient fixtures and appliances. The eligible appliances that fall under this

prerequisite are residential clothes washers and dishwashers, as they are commonly used appliances

within buildings and contribute to indoor water use. These appliances must meet certain efficiency

standards, such as being ENERGY STAR certified or equivalent, which ensure they use less water than

conventional models.

Reference: Specification of appliances under the Water Efficiency Prerequisite for Indoor Water Use

Reduction, which includes standards and requirements for residential clothes washers and

dishwashers, among other appliances .

According to LEED v4 requirements, all newly installed fittings and fixtures that are eligible for the

WaterSense label must have a WaterSense label (or a local equivalent for projects outside the U.S.).

This ensures that the fixtures meet both water-efficient and high-performance testing

standards. Among the options provided, a private lavatory faucet is a fitting that would be newly

installed and is eligible for the WaterSense label, thus requiring it12.

Reference:

LEED v4 Water Efficiency Prerequisite 2 (WEp2) mandates that all newly installed fittings and fixtures

eligible for the WaterSense label must have it1.

The WaterSense label is a mark of water efficiency and performance, which aligns with the goals of

LEED certification2.