2020 LAKE HEIGHTS DR WATERFORD PLACE APTS 2021-12-14

2015 Washington State EnCode Compliance Forms for Commercial, R . R3 over 3 stories and all R1 Economizer Exceptions MECH-ECONO 2015 Washington State Energy Code Compliance Forms for Commercial Buildings including R2&R3 over 3 stories and all R1 Revised January 2017 Project Title: Waterford Apts Date 4/2/2019 For Building Dept.Use All cooling systems shall be configured to provide air economizer operation,regardless of system capacity,for new construction and mechanical system alterations.Various exceptions to this requirement are available.Identify all systems that an economizer exception will be applied to and additional information as noted below. Economizer ECONOMIZER EXCEPTIONS-NEW CONSTRUCTION AND ADDITIONS Lighting+ Exception Exp 1 Cooling equipment serving spaces that are provided with a dedicated System ID Equipment outdoor air system(DOAS)per C403.6.Spaces served shall have year- Loads(W/sf) Summary round design cooling loads from lights and equipment less than 5 watts per square foot. Exp 2 Single zone unitary or package systems with dehumidification that affect System ID other systems such that air economizer would increase energy consumption. Refer to Section C403.3 for descriptions of Exp 3 High efficiency single zone unitary or packaged systems.Equipment System ID economizer cooling efficiency shall be better than the WSEC required minimum provisions and efficiency by at least 64%in Climate Zone 4C and 59%in Climate Zone 5B exceptions. For per Table C403.3. alterations refer to Section Exp 4 Equipment that provides hydronic chilled water for chilled beams and System ID C503.4 and chilled ceiling systems that is served by a water economizer system per Table C503.4. C403.3.4 in lieu of air economizer. Exp 5 Water-source heat pumps with heat recovery.Heat pump efficiency shall System ID be 15%better than WSEC required minimum efficiency.Provide at minimum 60%air economizer.Energy recovery to preheat OSA shall have at least 50%effectiveness.Additional system requirements apply. Exp 6 Cooling equipment serving Group R occupancies.Per unit limit Equipment Cooling is less than 20,000 Btu/h cooling capacity for equipment installed System ID Location Capacity outdoors or in a mech room adjacent to the outdoors.For cooling (Btu/h) equipment installed in other locations the unit limit is less than 54,000 Btu/h.Efficiency shall be 15%better than WSEC required minimum efficiency. Exp 7 Variable refrigerant flow(VRF)systems with energy recovery.Outdoor Outdoor Unit Cooling unit shall be a reverse-cycle heat pump with variable speed System ID Capacity compressor(s)and condenser fan(s).Outdoor unit cooling capacity shall (Btu/h) be not less than 65,000 Btu/h.Energy recovery to preheat outdoor air shall have at least 50%rated effectiveness.System shall be capable of providing simultaneous heating and cooling by tranferring recovered energy from zone(s)in cooling mode to other zone(s)that are in heating mode. Exp 8 Cooling equipment serving Controlled Plant Growth Environments. System ID SEER,EER,& Equipment cooling efficiency shall be better than WSEC required IEER minimum efficiency by at least 20%.Not eligible:unitary and applied heat pumps. Exp 9 Cooling equipment with energy recovery.Spaces served shall have Lighting+ year-round design cooling loads from lights and equipment greater than System ID Equipment 5 watts per square foot.Energy recovery system shall utilize recovered Loads(W/sf) energy for on-site space heating or preheating of service hot water. Provide calculations to the code official that demonstrate the amount of recovered energy used for on-site heating purposes is equivalent to the annual energy that would be saved by the cooling system with air economizer per C403.3.