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About This Item
Full Description
Using the combination of computational tools and a full-scale laboratory exterior masonry chimney, the Gas Technology Institute (GTI) has framed this issue facing residential venting systems. Much of the work covered in this paper concerns the use and validation of VENT-II, a residential venting simulation software tool for common vented appliances key to the development of the National Fuel Gas Code venting guidelines. Through targeted use of computational fluid dynamics and full-scale experimental testing, GTI has begun an effort to validate and improve the accuracy and validity of the software, initially focusing on the performance of hot water boilers installed in exterior masonry chimneys. Through this validation, GTI has studied the impact of retrofit scenarios for vent system designs that are on the margins of compliance with the National Fuel Gas Code. As residences approach Zero Energy Designs, the push for higher efficiency appliances will continue to present challenges to safe and efficient venting systems.