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Evergreen State <br /> Heat & AC <br /> A Division of Evergreen State Sheet Meta(,Ine. <br /> Management of fresh air requirement for 4 front offices at Access Laser 2211 W. Casino RD Everett. <br /> 12/12/17 <br /> Issue: Plans call for 6CFM of fresh air per offices. Engineers noted adding a HRV. With the coring, <br /> ductwork, electrical (using a duct heater to reheating OSA that cannot be brought up to room temp) and <br /> cost of the equipment and install it is @$7,000 of additional cost for a very small amount of fresh air. <br /> Running the duct heater will eliminate any energy savings by the proposed plan. <br /> Current condition: The space is currently in an open office area and walls will be put up for the owners <br /> office space. Space is conditioned by a RTU Gas pack with an economizer. <br /> Proposed solution: Used existing ductwork to provide a small amount of fresh air to each office. We'll <br /> install a damper to restrict the airflow to @50CFM to prevent the multi zone Mitsubishi (used to <br /> independently control temperature for the offices) from too much differential changes. <br /> Washington State Energy code <br /> C101.3 Intent- allows flexibility for innovative approaches; and <br /> C102.1 General allows for the local code official to determine if this is meeting the intent of the code. <br /> The proposed solution will meet the requirements of the 6CFM per space, have no utility cost penalty and <br /> cost the customer much less than the proposed engineered recommendation. <br /> The existing package units on the roof are being upgraded to demand ventilation, with new economizers, <br /> controls and the ability to drive the economizers from 0-100%. Also the new controls will run the fan <br /> during occupied times, with data tracking 24X7. <br /> SNOPUD has rebated the installation of the proposed Mitsubishi 4 Zone ductless. <br /> Thank you, <br /> Mark Payne <br /> Energy Consultant- Evergreen State Heat&A/C <br />