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2. Duct (flow) - Wikipedia

   en.wikipedia.org/wiki/Duct_(flow)

   Kinks in flexible ducting must be avoided. Some flexible duct markets prefer to avoid using flexible duct on the return air portions of HVAC systems, however flexible duct can tolerate moderate negative pressures. The UL181 test requires a negative pressure of 200 Pa. To use flexible ducting in a system, make sure to pull the duct tight so you ...

3. Ductwork airtightness - Wikipedia

   en.wikipedia.org/wiki/Ductwork_airtightness

   So-called "duct tapes" are often not suited for sealing ducts, [17] [18] which explains why, in the US, the International Energy Conservation Code (IECC) requires any tape used on duct board or flexible ducts to be labeled in accordance with UL 181A or 181B. Typical reasons for poor ductwork air tightness include: [19] [20] [12]

4. Hart & Cooley - Wikipedia

   en.wikipedia.org/wiki/Hart_&_Cooley

   In the second half of the century, Hart & Cooley expanded into many other products lines, including Type-B vent for gas-fired appliances, all-fuel chimney systems and flexible air ducting. Hart & Cooley Inc. celebrated its centennial anniversary in June 2001, and 6 years later moved its headquarters to Grand Rapids, MI, 30 miles northeast of ...

5. Underfloor air distribution - Wikipedia

   en.wikipedia.org/wiki/Underfloor_air_distribution

   Underfloor air distribution (UFAD) is an air distribution strategy for providing ventilation and space conditioning in buildings as part of the design of a HVAC system. UFAD systems use an underfloor supply plenum located between the structural concrete slab and a raised floor system to supply conditioned air to supply outlets (usually floor ...

6. Goodman Global - Wikipedia

   en.wikipedia.org/wiki/Goodman_Global

   Goodman Manufacturing was founded by HVAC dealer, Harold V. Goodman, in 1975 as a manufacturer of flexible air ducts and plastic blade registers. However, he turned his sights to fulfill a dream of manufacturing affordable HVAC equipment for households across the United States of America and beyond. [citation needed]

7. The Most Important Place You're Probably Forgetting To Dust - AOL

   www.aol.com/most-important-place-youre-probably...

   Despite the inaccessibility of all ductwork and air vents in your home and the challenge of cleaning them, it is essential to take steps to clean what you can easily access. “In addition to ...