Vent Pipes and the 4 categories of heating appliance ventilation

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PEX Universe (aka PEX-U) is a leading industrial equipment supplier offering high quality heating and plumbing solutions for real life professionals, homeowners + DIYers. The mission of the brand is to equip and empower consumers by providing the best products for heating and plumbing, delivering the most authentic customer service, and offering the most competitive prices available online. PEX Universe was established in 2004, and is based in Brooklyn, NY.

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The 4 categories of heating appliance ventilation are made up of different variations of positive and negative pressure as well as whether the machine is Condensing or Non-condensing. I break down what this means in the video.

Centrotherm Innoflue polypropylene Single Wall (SW), Flex and Concentric vent pipe, fittings and accessories for residential & commercial natural gas and propane-fired boilers, water heaters and furnaces. UL 1738 listed and approved for Category IV (power vented, condensing) appliances.

Z-flex brand stainless steel venting pipe, fittings and parts – approved for for installation with Category III (non-condensing, power-vented) and Category IV (condensing, power-vented) gas fired appliances. Recommended for Takagi tankless water heaters.
Note: Z-Vent series will be gradually transitioned to NovaVent. These use a different steel alloy, but meet the same high quality standards set by Z-Flex and are also UL 1738 listed.

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