Full Description

Air leakage in forced air duct system is acknowledged to be a major source of energy losses in both residential dwellings and commercialestablishments. A recent study reported heating and cooling systems use nearly 60% of total energy consumed in a residential dwelling. In NorthAmerica, each year more than $5 billion worth of electrical energy is lost due to leaky ductwork. This paper presents an innovative liningtechnology developed using ultra-thin liner material impregnated with Class I fire retardant resin to restore the air tightness of aged HVAC ductsystems. Re-thinking every aspect of a generation old lining technology Cured-in-Place Pipe (CIPP) used for rehabilitation of buried pipelines, thisinnovative HVAC lining system utilizes a newly designed liner, an efficient wet-out system, and an innovative installation procedure to yieldsubstantial cost savings in terms of materials and labor. The technology enables the liner to engage multiple 90 bends in circular and rectangularduct geometries with formation of minimum wrinkles, although sealing the gaps and openings up to 8 in. (203.2 mm) in diameter, while addingminimum weight to the existing duct system. Fullscale demonstration in two residential homes in Ruston, Louisiana was performed successfully.Standard duct-blaster tests revealed as much as 90% reduction in energy losses through the duct system.

Citation: ASHRAE Papers CD: 2014 ASHRAE Annual Conference, Seattle, WA

Product Details

Published: 2014 Number of Pages: 10File Size: 1 file , 1.5 MB Product Code(s): D-SE-14-C067