International Mechanical Code - Chapter 4, 5 & 9 Chapter 4: Alternate Method For Determining Exhaust Ventilation Rates At Enclosed Parking Garages -- IMC/4/#1 - 7/14/06 (PDF Document, 48kb) Chapter 5: Installation of Recirculating Draft Hood Systems -- IMC/5/#2 - 12/15/00 (PDF Document, 58kb) Chapter 5: Hood Requirements for Counter Top Dishwashing - IMC/5/#3 - 7/1/03 (PDF Document, 323kb) Chapter 9: Installation of Unvented Heaters in Buildings -- IMC/9/#1 - 2/1/00 (PDF Document, 62kb) PDF Information Some of the links on this page are to PDF documents. To open PDF files you will need Adobe Acrobat Reader installed on your computer, it is available for free from Adobe.com.