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Makeup air Mot <br />1. Applicant shall provide makeup air ess than 90% of the exhaust. ?ice 4 % cfm. <br />2. Makeup air system shall be electrically interlocked with the exhaust system, such [tie makeup air <br />system will operate when the exhaust system is in operation. Provide note on plan sheet no. <br />3. Makeup air s1.311 be provided by a fan or motorized damper of sufficient capacity. Windows and door <br />openings shall not be used for the purpose of providing makeup air. <br />4. If mere than 2500 cfm supplied to the space other than the hood, provide heater capable of heating <br />makeup air supplied to the space to 65 degrees F . output dTU <br />Heater model # Input BTU P <br />Heater CFM _ _ AFUE <br />fI { <br />FAN t%/� <br />\MOTORIZED DAMPER <br />� �� R77i �2�i� <br />Make and model H.P. air vpincity. 500 fom <br />Static pressure �� in. at <br />cfm. <br />U N ft %/14 2 <br />Duct Dimension �, %ar a r <br />Air velocity = cfm/area I 11141 <br />tGiOa fpm <br />J. slope of duct and cleanout access I n,/P <br />1. Horizontal duct less than 75 long min slope 1/4 in/ft proposed _ <br />more than 75' long min slope 1 in/ft proposed _ <br />2. Tight -fitting cleanout doors shall be provided at Total no. proposed <br />every change in ductwork direction. <br />K. Duct enclosure <br />Duct area req. = cfm/500 fpm /500 = _ftz <br />Duct. Dimension req. <br />Eff. Damper opening X = <br />ft2 <br />in/ft <br />inm <br />1. Ducts penetrating a ceiling, wall or floor shall be enclosed in a duct enclosure from the point of <br />penetration to the outside air. A duct may only penetrate exterior walls at locations where unprotected <br />openings are permitted by Table 5A of the 1997 Seattle Building Code. <br />2. For code compliance purposes, it is acceptable to assume that ducts penetrating concrete, brick or steel <br />ceilings, walls or floors shall require a 2-hour fire -resistive duct enclosure, and for others, it shall be 1 hour. <br />Type of Const. Min. Fire -Resistive Proposed Proposed Material and Construction <br />Const. of Enclosure <br />I F.R., II F.R. 2 hour _ hr. <br />II, III, IV, V 1 Hour hr �'/a 11 f <br />3. Duct enclosures shall be separated from the duct by at least 3 and not more than 12 inches. Prcfosed in. <br />4. Duct enclosure shall be sealed around the duct at the point of penetration and vented to the exterior \ <br />through a weather -protected opening. J <br />5. Duct enclosures shall servo only one kitchen exhaust duct. <br />6. Tight -fitting access openings shall be provided at each clean <br />out door. Access enclosure doors shall <br />have a fire -resistance rating equal to the enclosure. <br />L. Multiple hood venting <br />1. Number of hoods vented by a single duct system: <br />A single duct system may serve more than one hood located in the same story of the building, provided <br />that the interconnecting ducts do not penetrate any fire construction. <br />2. A hood outlet shall serve not more than a 12-foot section c` hood. Sheet 3 <br />