1520 80TH ST SW HEROUX DEVTECH 2019-08-12

2. Vertical fenestration alternate per Section existing structure,or proximity to C402.4.1.1 for the area adjacent to the new adjacent air intakes/exhausts make full vertical fenestration added. compliance impractical.Alternate designs shall 3. Component performance option with target area provide alternate energy savings strategies adjustment per Section C402.1.5 or the total including,but not limited to,Demand Control building performance option in Section C407 Ventilation or increased mechanical cooling or for the whole building. heating efficiency above that required by Tables C503.3.2.1 Application to replacement C403.2.3(1)through C403.2.3(10). ** fenestration products.Where some or all of an 2. Qualifying small equipment:This exception existing fenestration unit is replaced with a new shall not be used for unitary cooling equipment fenestration product,including sash and glazing,the installed outdoors or in a mechanical room replacement fenestration unit shall meet the adjacent to the outdoors.This exception is applicable requirements for U-factor and SHGC in allowed to be used for other cooling units and Table C402.4. split systems serving one zone with a total Exception:An area-weighted average of the cooling capacity rated in accordance with U-factor of replacement fenestration products Section C403.2.3 of less than 33,000 Btu/h being installed in the building for each fenestration (hereafter referred to as qualifying small product category listed in Table C402.4 shall be systems)provided that these are high-efficiency permitted to satisfy the U-factor requirements for cooling equipment with SEER and EER values each fenestration product category listed in Table more than 15 percent higher than minimum C402.4.Individual fenestration products from efficiencies listed in Tables C403.2.3(1)through different product categories listed in Table C402.4 (3),in the appropriate size category,using the shall not be combined in calculating the same test procedures.Equipment shall be listed area-weighted average U-factor. in the appropriate certification program to qualify for this exception.The total capacity of C503.3.3 Skylight area.The addition of skylights that all qualifying small equipment without results in a total building skylight area less than or equal economizers shall not exceed 72,000 Btu/h per to that specified in Section C402.4.1 shall comply with building,or 5 percent of its air economizer Section C402.4.Alterations that result in a total capacity,whichever is greater.That portion of building skylight area greater than that specified in the equipment serving Group R occupancies is Section C402.4.1 shall comply with the component not included in determining the total capacity of performance option with target area adjustment per all units without economizers in a building. Section C402.1.5 or the total building performance Redundant units are not counted in the capacity option in Section C407 for the whole building. limitations.This exception shall not be used for ** : C503.4 Mechanical systems.Those parts of systems the shell-and-core permit or for the initial tenant : which are altered or replaced shall comply with Section improvement or for Total Building Performance. : C403.Additions or alterations shall not be made to an 3. Chilled water terminal units connected to : existing mechanical system that will cause the existing systems with chilled water generation equipment : mechanical system to become out of compliance. with IPLV values more than 25 percent higher than minimum part load efficiencies listed in Exception:Existing mechanical systems which are Table C403.2.3(7),in the appropriate size altered or where parts of the system are replaced are not category,using the same test procedures. required to be modified to comply with Section C403.6 Equipment shall be listed in the appropriate as long as mechanical cooling is not added to the certification program to qualify for this system. exception.The total capacity of all systems All new systems in existing buildings,including without economizers shall not exceed 480,000 packaged unitary equipment and packaged split systems, Btu/h per building,or 20 percent of its air shall comply with Section C403. economizer capacity,whichever is greater.That Where mechanical cooling is added to a space that was portion of the equipment serving Group R not previously cooled,the mechanical system shall occupancy is not included in determining the comply with either Section C403.6 or C403.3. total capacity of all units without economizers in Exceptions: a building.This exception shall not be used for 1. Alternate designs that are not in full compliance the initial permit(this includes any initial permit with this code may be approved when the code for the space including,but not limited to,the official determines that existing building shell-and-core permit,built-to-suit permit,and constraints including,but not limited to, tenant improvement permit)or for Total available mechanical space,limitations of the Building Performance Method. 2015 Washington State Energy Code II CE-121