EAc5.2: Requirement: Include a centrally monitored electronic metering network in the base building design that is capable of being expanded to accommodate the future tenant sub-metering as required by LEED for Commercial Interiors Rating System Credit EA3. Also develop a tenant M&V plan that documents and advises future tenants of this opportunity and the means of their achievement. Intent: Provide for ongoing accountability of building electricity consumption performance over time. THE APPROACH: For EAc5.2: LEED Core & Shell credit EAc5.2 references LEED CI EAc3, for which we will account for both Case A & Case B situations (but only providing for the capability of electrical energy monitoring). This project will have the capability & physical space needed to sub-meter the majority of tenant electrical usage. The tenant will have the ability to expand their metering so that their electrical use for lights, vav\'s, piu\'s, and receptacles can be monitored. However, the monitoring of the electricity to run the RTUs for space heating and cooling will be handled differently as there is no way to directly account for each individual tenant\'s electrical consumption for this heating and cooling. Each floor has its own RTU, which can be supplied with its own meter, allowing for monitoring of electrical use for each floor of tenants. Therefore, to obtain the amount of electricity consumed by each tenant for HVAC use, the total electricity recorded for each floor would be multiplied by the percentage of square footage occupied per tenant. The electricity required to operate common spaces, such as the lobbies, bathrooms, and elevators, will also be metered individually. A percentage of that electrical use will be applied to each tenant\'s electrical consumption as well based upon occupied square footage within the building. The manufacturer of the HVAC equipment (Trane) will be able to tie into all the meters and monitor/tabulate all electrical use within the building through their system\'s program. REQUIRED CLARIFICATION: In reference to EAc5.2: 1. Please verify that the explanation given in the previous section fulfills the credit requirements for the specified credit. 2. The locations within the building plan that need to be designated for tenant sub-metering equipment are only for electrical meters, which can track the electrical energy needed to run the services called out in Case B of EAc3 of LEED-CI. This credit calls for including a centrally monitored electronic metering network that is capable of being expanded to accommodate the future tenant sub-metering of electricity consumption ONLY. 3. Please verify that EAc5.2 is not dependent upon EAc5.1. In other words, EAc5.2 is not a "point in addition" to EAc5.1, such as is the case with WEc3.2 and WEc3.1. 4. Please verify that the M&V plan for EAc5.2 can be consistent with either Option B, C or D of the 2001 IPMVP Volume 1: Concepts and Options for Determining Energy and Water Savings. 5. Please verify that EAc5.2 calls for the development of a tenant M&V plan, and any calculations or modeling that needs to be performed will be completed by the tenant and is not required for this credit.
In response to submitted questions: 1. The system described appears to meet the intent of the credit and will be awarded if all actions are fulfilled and the credit is adequately documented. 2. The metering systems installed under this credit should be considered a subset of the more comprehensive M&V requirements of CI EAc3 (which addresses all energy sources and major end uses). 3. EAc5.1 and EAc5.2 are independent of each other. Having said this, the metering systems required by EAc5.2 are a relatively simple extension of the EAc5.1 systems should EAc5.1 be pursued. 4. As with the physical metering systems, the M&V plan associated with this credit should be considered a subset of the more comprehensive M&V plan associated with CI EAc3. 5. This credit requires only development of the M&V plan, not implementation of the M&V program. ************************************************************ Additional clarification from EA TAG re: CS EAc5.1 and EAc5.2: EAc5.1: Delete first bullet point of Requirements. Replace second bullet point of Requirements with the following: "Develop and implement a Measurement & Verification (M&V) Plan consistent with Option D: Calibrated Simulation (Savings Estimation Method 2), or Option B: Energy Conservation Measure Isolation, as specified by the International Performance Measurement & Verification Protocol (IPMVP) Volume III: Concepts and Options for Determining Energy Savings in New Construction, April, 2003. The documentation is to include 1) a description of the metering infrastructure design, 2) existing meter locations, 3) existing meter specifications, 4) 1-line electrical schematics identifying end-use circuits, 5) guidelines for carrying out tenant sub-metering. EAc5.1 and EAc5.2: These credits reference IPMVP Vol. III, while LEED CI references IPMVP Vol. I. However, using Vol. III methodologies for these credits fully meets the intent of CI EAc3. Applicable Internationally.