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HomeMy WebLinkAboutB12-0355 Radar eng report on air balancing 12/17/12 Mountain Standard p 1 of 1 PO BOX 8610 • AVON, CO 81620 • Telephone 970-845-7910 Fax 970-845-7522 • E-mail drader@raderengineering.com MEMO TO: Mark Hallenbeck, Rocky Mountain Construction Group FROM: Bryan Houle, Rader Engineering DATE: 12/17/12 RE: Grease Duct Clean-outs and Test, Adjust & Balance Report Items: 1. Section 506.3.8.2 of the 2009 IMC requires inline fans to have clean-outs at both the inlet and outlet of the fan. Each kitchen exhaust fan (KEF-1 & KEF-2) has two built-in access doors which can serve as clean-outs. Because the doors are located on the upstream side of the impeller, these can count as clean-outs for the inlet side of the fan. There are field installed clean-outs at the outlet side of each fan. Therefore, the installation meets the intent of the cited code section. 2. We have reviewed the TAB Report (dated 12/15/12) and have the following comments: a. All fan airflow is within 10% of design (industry standard) and we take no exception to the restaurant opening to the public tomorrow, as planned. b. MAU-1 make-up air unit is at 91% of design airflow. Please have the TAB contractor adjust the drive system to achieve 100%. It is my understanding that a pulley is on order and once installed, 100% will be possible. Looking at the current amp draw as compared to the max amp rating of the motor, there is sufficient capacity to achieve 100%. c. KEF-1 kitchen exhaust fan is at 90% of design airflow. Please have the TAB contractor adjust the drive system to achieve 100%. Looking at the current amp draw as compared to the max amp rating of the motor, there is sufficient capacity to achieve 100%. d. Please submit a final TAB Report to Rader Engineering for our records. Sincerely, Bryan J. Houle, PE 12/17/12