flex duct - The Building Code Forum
Sep 23, 2020 · A flexible air connector and Flexible ducts are not the same and you must look at the label to know which one you have FLEXIBLE AIR CONNECTOR. A conduit for transferring air …
Flex Duct | The Building Code Forum
Feb 1, 2012 · A flexible air connector as listed in IMC 603.6.2 can only have a maximum length of 14 feet 603.6.3 prohibits it from passing through any wall, floor or ceiling and is listed under UL181 but …
ICC Clarifies Conditions for Duct Penetrations Through Rated …
Oct 16, 2009 · A recent code interpretation provides critical guidance on whether exhaust ducts are permitted to penetrate fire-resistance-rated horizontal assemblies in multi-family residential buildings. …
flexible duct or flexible connector - The Building Code Forum
Nov 30, 2009 · You will have to check whether the product is listed as air duct or an air connector. What I have seen is the insulated flex is listed as duct, and the foil uninsulated flex is listed as an air …
Penetrations followed by flex duct within rated floor-ceiling assembly
Oct 19, 2009 · If it does it is in violation of 716.7 Flexible ducts and air connectors. Flexible ducts and air connectors shall not pass through any fire-resistance-rated assembly. Flexible air connectors shall …
Clothes dryer duct - manufacturer instructions vs. code
May 17, 2012 · The maximum length of the exhaust duct shall be 35 feet (10 668 mm) from the connection to the transition duct from the dryer to the outlet terminal. Where fittings are used, the …
Type I Hood Make Up Air Duct Material - The Building Code Forum
Oct 20, 2009 · Designer is proposing to install flammable flexible air duct material for make up air at a Type I hood. This will ultimately be directly connected to the hood. The plans show a 24" section of …
Zip Ties On Flex Ducts - The Building Code Forum
Oct 19, 2009 · Duct connections to flanges of air distribution system equipment or sheet metal fittings shall be mechanically fastened. Mechanical fasteners for use with flexible nonmetallic air ducts shall …
UL-181 tape for ducts - The Building Code Forum
Jun 13, 2013 · Closure systems used with flexible air ducts and flexible air connectors shall comply with UL 181B and shall be marked181B-FX for pressure-sensitive tape or 181B-M for mastic. Duct …
Dryer duct joint connection methods - The Building Code Forum
Nov 15, 2011 · Closure systems used to seal flexible air ducts and flexible air connectors shall comply with UL 181B and shall be marked "181 B-FX” for pressure-sensitive tape or "181 B-M” for mastic.