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Guide to Side Wall Vent Chimneys & Flues - Direct-Venting ...

"Sidewall or Vertical Direct Vent or Direct Exhaust" systems for gas fired water boilers are provided by Weil McLain for Weil McLain's Gold CGs Gas-Fired Water Boilers [10] Listed special gas vent systems that comply with UL-1738 & UL S636 and in Canada certified by CSA are the only vent systems that can be used with Weil Mc-Clain's CGs ...

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Boiler Flues - Ultimate Guide with Boiler Flue Regulations ...

Boiler flues are fitted when using combi regular and system boilers. The only exception that may apply to a small number of homeowners is a back boiler. This is a type of boiler that is fitted behind a fireplace. If you have a gas boiler behind your fire the emissions will exit through your chimney rather than via a boiler

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