D.C. Mun. Regs. tit. 12, 12-I8.1

Current through Register Vol. 71, No. 49, December 6, 2024

Section 12-I8.1 - GENERAL

Insert a new Section 8.1.5 into the Energy Conservation Code-Commercial Provisions to read as follows:

8.1.5

Establishing an open and interoperable automated demand response (Auto-DR) infrastructure. Buildings that contain heating, ventilation, or air conditioning (HVAC) systems shall comply with Sections 8.1.5.1 through 8.1.5.3. Actual participation in demand response programs is not required.

Exceptions: Auto-DR infrastructure is not required for the following:

1. Buildings located where the electric utility or regional Independent System Operator (ISO) or Regional Transmission Operator (RTO) does not offer a demand response program to buildings regulated by this code.

2. Buildings with a peak electric demand not greater than 0.75 times that of the standard reference design.

3. Buildings that have incorporated on-site renewable energy generation to provide 20 percent or more of the building's energy demand.

8.1.5.1

Software clients. Demand response automation software clients shall be capable of communicating with a demand response automation server via the Internet or other communication relay.

8.1.5.2

Heating, ventilating and air-conditioning (HVAC) systems. The Auto-DR strategy for HVAC systems shall be capable of reducing the building peak cooling or heating HVAC demand by not less than 10 percent when signaled from the electric utility, regional independent system operator (ISO) or regional transmission operator (RTO), through any combination of the strategies and systemic adjustments, including, but not limited to the following:

Exceptions: The Auto-DR strategy is not required to include the following buildings and systems:

1. Hospitals and critical emergency response facilities.

2. Ventilation and exhaust systems required by Chapter 5 of the Mechanical Code for the control or removal of dust, particles, odors, fumes, spray, gas, smoke or other hazardous materials, considered to be irritating or injurious to health or safety, and produced by or involved in operations or processes, including hazardous materials storage.

3. Manufacturing process systems.

4. Group R occupancies.

8.1.5.2.1

Rebound avoidance. The Auto-DR strategy shall include logic to prevent a rebound peak. When the signal for Auto-DR is ended, a gradual return to normal heating, ventilation and air-conditioning (HVAC) equipment operations shall be part of the Auto-DR strategy, through any combination of the strategies and systemic adjustments, including, but not limited to the following:

1. Where close to the unoccupied period, the Auto-DR period shall be extended using rebound avoidance, extended Auto-DR control strategy until the initiation of the unoccupied period.

2. Rebound avoidance, slow recovery control strategies, gradually increasing or decreasing space temperature setpoints or a variance in the timing by cooling or heating zone.

3. Rebound avoidance, slow recovery control strategies, gradually increasing or decreasing zone supply air temperatures.

4. Rebound avoidance, slow recovery control strategies, gradually increasing or decreasing chilled water temperatures or decreasing hot water temperatures.

5. Rebound avoidance, sequential equipment recovery strategies, gradually restoring demand limited equipment capacity.

6. Rebound avoidance, sequential equipment recovery strategies, gradually restoring equipment that was turned off during the Auto-DR period.

7. Rebound avoidance, slow recovery control strategies, gradually increasing capacity for air moving and pumping systems.

8. Rebound avoidance, sequential equipment recovery or rebound avoidance, slow recovery control where chilled water or hot water and other capacity control valves are sequentially or gradually allowed to return to normal operation, respectively.

D.C. Mun. Regs. tit. 12, 12-I8.1

Final Rulemaking published at 67 DCR 5679 (5/29/2020)