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Makeup Air Opening Table for New and Existing DweUing <br /> Tabie 501.3.2 <br /> One or multipie power One or multiple fdn- One atmpsphericaily Multipie atmospherkatly <br /> vent,direct vent ap- assisted appiiances and vented gas or oit ap- vented gas or oiI ap- 6uei di- <br /> piiances,or no combus� power vent or direct piiance or one solid fuei pliances ar solid fueE ameter <br /> tion apptiances vent appGances appHance appiiances <br /> Colurpn A Column B Column C Caiumn D <br /> Passrve opening 1-36 1-22 1-15 1-9 3 <br /> Passive opening 37-66 23-41 16-28 10-17 4 <br /> Passive opening 67-109 42-66 24-46 18-28 5 <br /> Passive openin� 110 163 67-100 47-59 29-42 6 <br /> Passive opening I54-232 i01-143 70-99 43-61 7 <br /> Passive opening 233-317 144-145 100-135 62-83 8 <br /> Passive apening 318-419 146-258 136-179 84-I10 9 <br /> w/motorized damper <br /> Passive opening 42Q-539 259-332 180-230 111-142 �Q <br /> w/motorized damper <br /> Passive opening 540-679 333-419 231-29Q 143-179 I1 <br /> wJmotonzed damper <br /> Powered makeup ai� >679 >414 >290 >179 Nq <br /> Nates: <br /> A. An equivalent length of iQ0 feet of�ound smooth metal duct is assumed. 5ubtract d0leet for the exterior hood and ten(eet for each 90-degree eibow to <br /> determine the remaining length of straight duct aliowable. <br /> B. If flexible duct is used,increase the duct diameter by one inch. Flexible duct shaH be stretched with minimai sags. Compressed duct shaii not be accepted. <br /> C Barometric dampers are prohibited in passive makeup air apening5 when a�y atmaspherically vented appliance is instailed. <br /> D. Powe�ed makeup air shaq be electricaNy in[eriacked with the largest exhaust system. <br /> Sections F <br /> Combustion air <br /> Not required per mechanical code{No atmospheric or power vented appliances) <br /> Passive(see IFGC Appendix E,Worksheet E-i) S�ze and type „s <br /> Other,describe: <br /> Explanation-lf no atmpspi�eric o�power vented appliances are installed, check the appropriate box, not requrred. lf a power vented <br /> or atmospfrericalty vented apptiance insta!led, use 1FfiC Appendix E, Worksheet E-1(see below). Please enter size and type. Cambus- <br /> tion air vent supplies must communicaie with the applionce or apptionces that require the combustion arr. <br /> Sectron F calculations follow on the next 2 pages. <br /> Page 4 of 6 <br />