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Architect Guide
Product Installation Instructions
Rectangle Door Set
OPTIONS AND ACCESSORIES
Empire Innsbrook 31" Medium Direct Vent Clean Face Millivolt Control, Natural Gas Traditional Fireplace Insert Ignition Type:. Architect GuideA Direct Vent system uses two vent pipes. One draws air in from outdoors to support combustion. The other exhausts the by products of combustion to the outside. The two vent pipes may be concentric (exhaust pipe within a larger diameter intake pipe) or co linear (separate pipes of about the same size). Combustion takes place inside a sealed chamber with a glass front in the case of a fireplace. Room air circulates around the combustion chamber, often
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