Frequently Asked Questions
Per the mechanical code, the requirement is a 200lb load applied to a 2" disc at the most critical area of a floor register. All of our registers (utility and decorative) meet or exceed this requirement. Our most robust model would be the 210/265 models.
Effective area, Ak.
Potential Changes to Uniform Mechanical Code (UMC) that could affect Flexible Duct Business.
Please click to download PDF call to comment letter.
Yes. Our installation instructions are in full compliance with UL and ADC standards.
Yes. Per the 2006 Int'l Mech Code Section 602.2.1.
Hart & Cooley does not recommend screws be used to fasten the polyester core of the air ducts because they weaken the polyester.
Yes and No. Yes, if the appliance can overcome the increased static pressure and still deliver the required amount of cfm needed to condition the space.
Yes. Per the UL181 test standard, the flex duct must be inoculated with mold mycelia & spores and inhibit the inoculated area to grow over a period of 60 days.
Yes. We recommend that you use insulated flex duct in longer vent run applications to assist in keeping the humidity from condensing inside the duct and to help prevent the pooling of water, which can damage the core.
No, even though our black jacket offering has some inherent UV resistance we do not recommend the use of our product to be used in direct sunlight and cannot guarantee the longevity associated with that application.
Air ducts must pass 15 tests of the UL181 Standard for Safety for Factory Made Air Ducts and Air Connectors.
No. The International Mechanical Code & Residential Code state that "Exhaust ducts for domestic clothes dryers shall be constructed of metal and shall have a smooth interior finish...."
To keep your vent systems noise free, use these best practices at the time of installation.
Yes, you can paint exposed b-vent to match the color of the siding or roof shingles.
Often, noise in Type B gas vent is caused by the relative movement of parts in the system with adjacent parts, with part of the structure, or because of additions or changes to the parts and/or system.
No, Hart & Cooley's Type B gas vent does not have a fire rating. Neither do any of our competitors.
Generally, NO, Hart & Cooley does not want sheet metal screws used in the assembly or installation of our Type B gas vent.
No. Per the sizing tables, all orientations must terminate vertically with a UL listed rain cap, otherwise the appliance may not vent properly.
The Category is actually applied to the appliance.
1" clearance is required per our UL listing for all installations.