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B-Vents
Type “B” Gas Vent, is a very common chimney system used
for natural gas
and propane fired appliances. This type of venting is a galvanized
piping system that has a double wall construction and is usually
installed inside the envelop of the building. These vent systems are to
be installed using the approved manufactures components and
instructions. Recently there has been a great concern regarding these
vent systems being used on the outside of a building. This type of vent
system, in most cases, has not been designed to be outside the building
walls except above the roofline. Unless the Type “B” Gas Vent has
approval to be installed outside it will have to be changed to a
different vent system, at the addition or replacement of an appliance.
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Furnace “B” Vent Chimneys
Type “B” Gas Vent is worry free, if installed following the
manufacturers instructions and codes. All visible components should be examined yearly, looking for damage and wear. Cleaning is not necessary under normal operations, but maybe required if recommended by the heating contractor. Manufacturers recommend painting the portion of vent that will be above the roof line.
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Chimney Crown Sealant
Chimney crowns or drip caps are designed to channel moisture away from the bricks of a chimney. Unfortunately this area breaks down with age and if left unattended, damage to the chimney increases. A sealant that is applied to the crown keeps moisture out, increasing chimney life.
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