As well as those suitable for category i gas fired appliances with b vent or appliances with a draft hood.
Category 1 vent pipe.
You should also limit the length of the horizontal flue pipe.
Ul 441 standard type b gas vent 4.
Venting guidelines for category i gas appliances single appliance vent tables 1 and 2 continued 10.
In other words in a category i venting system if.
Ul 103 standard building heating appliance chimney canada.
Masonry will use vitreous clay liner.
Ul 641 standard type l vent 3.
The amerivent all metal double wall gas vent is listed as type b by underwriters laboratories inc.
Kits in this category include those designed for natural draft appliances using gas oil or wood.
Ambient temperature two ambients must be considered.
The venting tables within this booklet have now been included in the national fuel gas code nfpa 54 ansi z223 1 1999.
Ameri vent chimney liner kits are designed to allow you to easily line masonry chimneys.
Gama venting tables for category i central furnaces.
Ul 103 standard building heating appliance chimney swkl vt 5.
Single wall galvanized pipe 26 gauge is only used as a connector on 70 percent afue and lower gas appliances and all oil appliances.
Ul 1738 standard special gas vent for category ii iii iv appliances 2.
A category i vent system works by allowing heated flue products to rise vertically so the vent pipe must rise vertically from the boiler vent connection as soon as possible.
Category i vent materials are found with older appliances.
Ul 1738 standard special gas vent for category ii iii iv appliances 6.
As stated earlier heat loss through the vent pipe walls can take away from the draft force.
In some cases transrite has been used which may contain asbestos.
Type b gas vent 3 12 type b gas vent 14 30.
Category i is defined as a gas heating appliance with a flue loss equal or greater than 17 non condensing with a negative vent static pressure.
All horizontal runs of vent pipe must rise 1 4 inch per foot of run to maintain proper draft in the vent.
First consider the ambient temperature of the air around the vent pipe.
1 avoid an excessive number of turns and bends figure 5 and 2 maximize rise.
And is approved for such residential and commercial applications as category 1 water heaters boilers furnaces space heaters or wall heaters.
