Laserfiche WebLink
Makeup Air Opening Table for New and Existing Dwellt�g <br /> Tabie 501.3.2 <br /> Ona or muldple power One or multiple fan- One atmospherically Multipie atmospheriwlly <br /> vent,direct vent ap- assisted appliaaces and vented gas or oil ap- ve�ted gas or oil ap- Ducc di- <br /> pNances,w na combus- power vent or direct pliance or one solid fuel pllances or sofld fue) ameter <br /> tion appliances vent appliances appllance applia�ces <br /> Column A Cofum�B Column G Colum�D <br /> Passlve opening 1—�6 1_ZZ Z_15 �_9 3 <br /> Passiveopenln8 37-66 23-41 �6-28 10-17 4 <br /> Passive opening 6�—109 42—GG 29—46 18—2g 5 <br /> Paufve opening 110•163 67—100 47—64 29—42 6 <br /> Passiveo ni 164—z32 101-143 70-99 43-61 7 <br /> Passive o eni 233—317 144—i95 100—135 62—83 g <br /> Passive apcning 318—419 lg6—258 136—179 84—110 9 <br /> w/motorizcd dam r <br /> Passfveopentng A2Q-539 259-332 180-230 ill—lA2 10 <br /> w/motorized dam cr <br /> Passive opening 540—679 333—419 231—290 143—179 12 <br /> w/moto�ized dam er <br /> Powcrcd makeu air >679 � >419 >240 >I19 NR <br /> Nates: <br /> A. M equivalent fength of 100 feet of round smooth metal duct is assumed. Subtract 4p feet for the exterior hood and ten feet for each 90-deqree elbow to <br /> determine the remaining length af stroight duct allowable. <br /> B. It flexible duct Is used,Inaease the auct dlameter by one 1nch. Flezible d�d shall be stretched with minimal sags, Compressed duct shall not be auepted. <br /> C. BaromeMc dampers are prohlbited In passive makeup air openings when any atmosphericaUy vented appifance ts Installed. <br /> D, Powered makeup atr shall be electrically Interlocked with the largest exhaust system. <br /> Sections F <br /> Combustion air <br /> ot required per mechanical cade�No atmo5pheric ar power vented appllanxs) <br /> Passive(see IFGC Appendix E,Worksheet E-3) Slxe and type � x <br /> Othar,deurtbe: <br /> Explanation-If no armospherlc or power venied appliances are lnstalled,check the appropriate bo�y not required. If a power vented <br /> or atmaspherlcally vented app!lance instp!led,use lfGC AppendJx E,Wvrksheet E-.1(see belawJ. Please en[er slze and type. Combus- <br /> tlon a!r vent supplles must communicate with fhe appllance or applfances that requlre the combustlon afr. <br /> Sectian F calcu/a�ions follow an the nex�t,2 pages. <br />