6502 EVERGREEN WAY ENHANCED SERVICE FACILITIES 2020-01-21

22122 20th Ave SE,Suite 161 PRESSLER. Bothell,Washington 98021 E2ngin rin .Inc (425)485-3002 (425)485-8114 Fax Mechanical.and Electrical Engineering Consultants • To: City of Everett,Mechanical Inspector Attention: Darold Walden Copy to: Todd Madison Regarding: Enhanced Services Facilities (ESF) kitchen hood makeup air Project address: 6504 Evergreen Way, Everett, WA 98203 Dear Sir, The installed kitchen hood at this project is a 48" stainless steel canopy type with 3 speeds of control options and up to 600 cfm exhaust airflow. Makeup air for this hood is provided via the HVAC system that is designed and intended to operate for 24 hours a day and 7 days a week, due to the nature of the occupancy. Within the kitchen space, the HVAC system constantly supplies 585 cfm of conditioned air. When the kitchen hood is operating this supply air will become makeup air and be exhausted out of the hood and the room will be under a slight negative pressure. When the hood is not operating, the supply air will provide positive pressure, with return air taken from the neighboring space. The HVAC systems are equipped with 100% outside air economizers. For this reason, the facility will most often have positive pressurization in the common areas. The mechanical design includes barometric relief, provided via relief air hoods at the roof. When not in economizer cooling mode, the HVAC systems are designed to bring in a minimum amount of fresh outside air to each indoor fan coil unit. The minimum outside air amount is sufficient to address the makeup air needed as well. Feel free to give me a call if you have any further questions or concerns. Thank you! Dawne Herrick, PE, LEED AP® Senior Mechanical Project Manager Pressler Engineering, Inc. "Excellence in Mechanical & Electrical Engineering" ESF in Everett Project Memorandum June 28,2018