A106. ENERGY CONSERVATION, EFFICIENCY AND EARTH ATMOSPHERIC QUALITY

A106 ENERGY CONSERVATION, EFFICIENCY AND EARTH ATMOSPHERIC QUALITY Strike Table A106 in Appendix A of the International Green Construction Code in its entirety and insert new Table A106 in Appendix A in the Green Construction Code in its place to read as follows: TABLE A106 ENERGY CONSERVATION AND EFFICIENCY PROJECT ELECTIVES SECTION DESCRIPTION MINIMUM NUMBER OF ELECTIVES REQUIRED AND ELECTIVES SELECTED A106.1 zEPI reduction project electives Yes No A106.1 Project zEPI score of 40 1 elective A106.1 Project zEPI score of 35 2 electives A106.1 Project zEPI score of 30 3 electives A106.1 Project zEPI score of 25 4 electives A106.1 Project zEPI score of 20 5 electives A106.1 Project zEPI score of 15 6 electives A106.1 Project zEPI score of 10 7 electives A106.1 Project zEPI score of 5 8 electives A106.1 Project zEPI score of 0 9 electives A106.1 Project zEPI score of -5 10 electives A106.2 Mechanical systems project elective Yes No A106.2 Heating equipment 1 elective A106.2 Cooling equipment 1 elective A106.2 Duct insulation 1 elective A106.2 Duct system testing 1 elective A106.2 Ductless systems 1 elective A106.3 Service water heating Yes No A106.4 Lighting power density electives Yes No A106.4 Lighting power density – 10 percent reduction 1 elective A106.4 Lighting power density – 15 percent reduction 2 electives A106.4 Lighting power density – 20 percent reduction 3 electives A106.4 Lighting power density – 25 percent reduction 4 electives A106.4 Lighting power density – 30 percent reduction 5 electives A106.5 Passive design Yes No A106.6 Renewable energy systems Yes No A106.6 Renewable energy systems—5 percent 1 elective A106.6 Renewable energy systems—10 percent 2 electives A106.6 Renewable energy systems—20 percent 3 electives A106.7 Energy display Yes No A106.8 Auto demand response for lighting Yes No A106.9 Insulation and fenestration Yes No A106.9 Insulation and fenestration – 10 percent greater efficiency 1 elective A106.9 Insulation and fenestration – 20 percent greater efficiency 2 electives A106.10 Permanent shading devices for fenestration - exterior Yes No A106.10 Permanent shading devices for fenestration - interior Yes No A106.11 Air leakage testing—0.25 cfm/ft2 qualifies for two project electives Yes No A106.11 Air leakage testing—0.15 cfm/ft2 qualifies for two project electives Yes No A106.12 Wastewater heat recovery Yes No A106.13 Circulating hot water systems Yes No A106.15 High efficiency equipment project electives Yes No A106.15 High efficiency equipment – 100 percent CEE Tier 1 1 elective A106.15 High efficiency equipment – 100 percent CEE Tier 2 2 electives A106.15 High efficiency equipment – 100 percent CEE Tier 3 3 electives A106.16 Green power purchases project electives Yes No A106.16 Green power purchases – 50 percent 1 elective A106.16 Green power purchases – 100 percent and Green-E Certified 2 electives Strike Section A106.1 in Appendix A of the International Green Construction Code in its entirety and insert new Section A106.1 in Appendix A of the Green Construction Code in its place to read as follows: A106.1 zEPI reduction project electives. Project electives using zEPI reductions for buildings designed on a performance basis shall be determined by predictive modeling. Predictive modeling shall use a source energy kBtu/sf-y unit measure based on compliance with Sections A106.1.1 and A106.1.2. Where a building has mixed uses, all uses shall be included in the performance-based compliance. A106.1.1 zEPI. Performance-based designs shall be determined in accordance with Equation A106-1 for energy use reduction: zEPI = 75 X (EUIp/EUI) (Equation A106-1) where: EUIp = the proposed energy use index in source kBtu/sf-y for the proposed design of the building and its site calculated in accordance with Section A106.1.2. EUI = the base annual energy use index in source kBtu/sf-y for a baseline building and its site calculated in accordance with Appendix G of the Energy Conservation Code. A106.1.2 Base annual energy use index. The proposed energy use index (EUIp) of the building and building site shall be calculated in accordance with Appendix G of the Energy Conservation Code, and approved modeling guidelines. The annual energy use shall include all energy used for building functions and its anticipated occupancy. A106.1.2.1 Electric power. In calculating the annual energy use index, consistent units shall be used for electric energy by converting the electric power use at the utility meter or measured point of delivery to Btus and multiplying by the conversion factor in Table A106.1.2.1 based on the geographical location of the building. TABLE A106.1.2.1 ELECTRICITY GENERATION ENERGY CONVERSION FACTORS BY EPA eGRID SUB-REGION eGRID 2010 SUB-REGION ACRONYM eGRID 2010 SUB-REGION NAME CO2e RATE (kg/kWh) RFCE RFC East 0.543 A106.1.2.2 Non-renewable energy. In calculating the annual energy use index, for fuel other than electrical power, energy use shall be converted to consistent units by multiplying the non-renewable energy fossil fuel use at the utility meter or measured point of delivery to Btus and multiplying by the conversion factor in Table A106.1.2.2. TABLE A106.1.2.2 U.S. AVERAGE BUILDING FUELS ENERGY CONVERSION FACTORS BY FUEL TYPE FUEL TYPE ENERGY CONVERSION FACTOR Natural Gas 1.09 Fuel Oil 1.19 LPG 1.15 Purchased District Heating—Hot Water 1.35 Purchased District Heating—Steam 1.45 District Cooling 0.33 X value in Table A106.1.2.1 Other 1.1 Strike Section A106.2 in Appendix A of the International Green Construction Code in its entirety and insert new Section A106.2 in Appendix A of the Green Construction Code in its place to read as follows: A106.2 Mechanical systems project elective. Buildings seeking mechanical systems project electives shall comply with Section A106.2.1. One elective shall be granted for each of the Sections A106.2.2 through A106.2.6. A106.2.1 Prescriptive path. The building shall be designed prescriptively in accordance with the Energy Conservation Code. A106.2.2 Heating Equipment. For heating equipment, the part-load, full load, annual, or season efficiency of the equipment shall be not less than 10 percent greater than the part-load, full load, annual, or season efficiencies shown in the applicable tables of the Energy Conservation Code, or the equipment shall be ENERGY STAR labeled, as applicable. Grid-interactive electric thermal storage heating systems shall be deemed to meet the requisites of this section where they are directly regulated by the grid operator to store energy during off-peak hours to utilize available renewable energy or to provide balancing services for management of the grid. A106.2.3 Cooling Equipment. For cooling equipment, the part-load, full-load, annual, or season efficiency of the equipment shall be not less than 10 percent greater than the part-load, full load, annual, or season efficiencies shown in the applicable tables of the Energy Conservation Code, or the equipment shall be ENERGY STAR labeled. Cooling equipment compressors shall have at least two-stage operation if available for the size of the equipment. A106.2.4 Supply and return duct insulation. Ducts shall be insulated to R-8 or greater where located in unconditioned spaces and R-11 or greater where located outside of the building structure. Where located within a building envelope assembly, the duct or plenum shall be separated from the building exterior or unconditioned or exempt spaces by R-8 insulation or greater. To qualify for this elective, there must be a minimum of one linear foot of applicable supply air ducting per 50 square feet of building area for ducts 600 CFM or less, or one linear foot of applicable ductwork per 200 square feet of building area for ducts supplying greater than 600 CFM. A106.2.5 Duct system testing. Low pressure duct systems shall be leak tested and shall have a rate of air leakage of 80 percent or less than that specified in R402.2.2.1 of the Energy Conservation Code. Other duct systems shall be leak-tested in accordance with the SMACNA HVAC Air Duct Leakage Test Manual and shall have a rate of air leakage (CL) less than or equal to 4 as determined in accordance with Equation 4-5 of the Energy Conservation Code. A106.2.5.1 Documentation. Documentation shall be furnished by the designer demonstrating that representative sections totaling not less than 50 percent of the duct area have been tested and that all tested sections meet the requirements of Section A106.2.4. Exception: Projects entailing more than seven duct systems shall utilize a sampling protocol approved by the code official. A106.2.6 Ductless Systems. Where a minimum of 85 percent of the total floor area of a building is served by ductless systems for space conditioning, or duct systems less than 10 feet in length, project teams shall receive one project elective. Strike Section A106.4 in Appendix A of the International Green Construction Code in its entirety and insert new Section A106.4 in Appendix A of the Green Construction Code in its place to read as follows: A106.4 Interior lighting power density reduction. Projects seeking the lighting power density reduction elective shall be designed prescriptively in accordance with the Energy Conservation Code. Projects seeking the lighting power density elective shall receive one project elective for 10 percent reduction, two project electives for 15 percent reduction, three project electives for 20 percent reduction, four project electives for 25 percent reduction, and five project electives for 30 percent reduction compared to the requirements of the Energy Conservation Code. Commercial buildings seeking the lighting power density reduction elective shall have at least 50 percent of the total building area designed and installed for permanent light fixtures. Exception: Groups R-2, R-3, and R-4 shall not achieve this project elective. Strike Section A106.6 in Appendix A of the International Green Construction Code in its entirety and insert new Section A106.6 in Appendix A of the Green Construction Code in its place to read as follows: A106.6 Renewable energy system project electives. Buildings seeking a renewable energy system project elective or electives shall be equipped with one or more renewable energy systems that have the capacity to provide the percent of annual energy used within the building as selected in Table A106. Insert new Sections A106.7 through A106.16 in Appendix A of the Green Construction Code to read as follows: A106.7 Energy display. Buildings seeking an energy display project elective shall install a permanent, readily accessible and visible display adjacent to the main building entrance or on a publicly available web site. The display shall be capable of providing all of the following: The current energy demand for the whole building, updated for each fuel type. The average and peak demands for the previous day and the same day the previous year. The total energy usage for the previous eighteen (18) months. A106.8 Auto demand response system for lighting. Buildings seeking an auto demand response system for lighting project elective shall install a system capable of reducing total connected power of lighting as determined in accordance with the Energy Conservation Code by not less than 15 percent. A106.9 Insulation and fenestration project electives. For projects seeking the insulation and fenestration project elective, the building thermal envelope shall exceed the requirements of Energy Conservation Code by not less than 10 percent. A second project elective shall be given for projects that exceed the building thermal envelope by 20 percent or more. Specifically, for purposes of compliance with this code, each U-factor, C-factor, F-factor and SHGC in the specified tables shall be reduced by 10 percent to determine the prescriptive criteria. A106.10 Permanent shading devices for fenestration. Projects seeking the permanent shading devices project electives shall comply with one of the following for vertical fenestration on the West, South, and East facades. One project elective shall be granted for exterior shading devices and one project elective shall be granted for interior shading devices. Vertical Fenestration shall be shaded by permanent projections that have an area-weighted average projection factor of not less than 0.50. The building is allowed to be rotated up to 45 degrees to the nearest cardinal orientation for purposes of calculations and showing compliance. Vertical fenestration shall have direct solar radiation for fewer than 250 hours per year because of shading by permanent external buildings, existing permanent infrastructure, or topography. Vertical fenestration shall have automatically controlled shading devices capable of modulating in multiple steps the amount of solar gain and light transmitted into the space in response to daylight levels or solar intensity that comply with all of the following: Exterior shading devices shall be capable of providing at least 90 percent coverage of the fenestration in the closed position. Interior shading devices shall be capable of providing at least 90 percent coverage of the fenestration in the closed position and have a minimum solar reflectance of 0.50 for the surface facing the fenestration. A manual override located in the same enclosed space as the vertical fenestration shall override operation of automatic controls no longer than 4 hours. Acceptance testing and commissioning shall be conducted to verify that automatic controls for shading devices respond to changes in illumination or radiation intensity. Vertical fenestration shall have automatically controlled dynamic glazing capable of modulating in multiple steps the amount of solar gain and light transmitted into the space in response to daylight levels or solar intensity that comply with all of the following: Dynamic glazing shall have a lower labeled SHGC equal to or less than 0.12, lowest labeled VT no greater than 0.05, and highest labeled VT no less than 0.40. A manual override located in the same enclosed space as the vertical fenestration shall override operation of automatic controls no longer than 4 hours. Acceptance testing and commissioning shall be conducted to verify that automatic controls for dynamic glazing respond to changes in illumination or radiation intensity. A106.11 Air leakage testing. Projects shall receive two project electives where the tested air leakage is 0.15 cfm/ft2 under a pressure differential of 0.3-inch water column (1.57 lb/ft2 or 1.25 L/s.m2 under a pressure differential of 75 Pa). Testing shall occur after rough-in and after installation of penetrations of the building envelope, including penetrations for utilities, heating, ventilating and air-conditioning (HVAC) systems, plumbing, and electrical equipment and appliances. Testing shall be done in accordance with ASTM E779, CAN/CGSB-149.10- M86, CAN/CGSB-149.15-96 or equivalent. Where the tested rate exceeds 0.15 cfm/ft2 but is less than 0.20 cfm/ft2, a visual inspection of the air barrier shall be conducted and any leaks noted shall be sealed to the extent practicable. An additional report identifying the corrective actions taken to seal leaks shall be submitted to the code official and the building owner, and shall be deemed to satisfy the requirements of this section. A106.12 Waste water heat recovery. Projects that install a waste water heat recovery system shall qualify for a project elective provided that the system preheats the incoming water used for hot water functions by not less than 10°F (5.6°C). A106.13 Circulating hot water systems. Projects seeking a circulating hot water systems project elective shall not have continuous, timer, or water temperature-initiated (aquastat) operation of circulating pumps. Gravity or thermosyphon circulation loops are prohibited. Pumps on circulating hot water systems shall be activated on demand by either a hard-wired or wireless activation control located within the room of final usage and of one of the following types: A normally open, momentary contact switch. Occupancy sensors. A flow switch. A door switch. A106.14 [Reserved] A106.15 High efficiency appliance elective. Projects seeking one high efficiency appliance elective shall install 100 percent Consortium for Energy Efficiency (CEE) approved appliances, commercial clothes washers, commercial kitchen equipment, and new consumer electronics (including computers, monitors, copiers, printers, and A/V equipment) used in the final project. Additionally, ENERGY STAR dryers shall be installed as applicable to the final occupancy. Fifty percent of the appliances must be new for the project to receive any electives in this section. Projects shall earn two electives by meeting all the requirements for the first elective, and in addition installing 100 percent CEE tier 2 products for those product types available in the CEE standard. Projects shall earn three electives by meeting all the requirements for the first two electives, and in addition installing 100 percent CEE tier 3 products for those product types available in the CEE standard. A106.16 Green power purchases. Projects that sign up for at least 50 percent green power for a minimum of five years of modeled design energy consumption or at least 8 kWh/sf/year shall receive one project elective. An additional project elective will be received for projects that sign up for 100 percent and Green-e certified green power for five years of modeled design energy consumption or at least 16 kWh/sf/year. SOURCE: Final Rulemaking published at 67 DCR 6509 (May 29, 2020 – Part 2). The District of Columbia Green Construction Code (2017), referred to as the “Green Construction Code,” consists of the 2012 edition of the International Green Construction Code (International Green Construction Code), published by the International Code Council (ICC), as amended by the District of Columbia Green Construction Code Supplement of 2017 (12-K DCMR). The International Green Construction Code is copyrighted by the ICC and therefore is not republished here. However, a copy of the text may be obtained at: https://codes.iccsafe.org/public/document/toc/548/. District of Columbia Municipal Regulations Green Construction Code Supplement of 2017 12-K DCMR § A106