1 1992 national standard of canada can cga b149 1 and 2 m91 natural gas and propane installation codes with amendment no.
Category 1 vertical venting.
There are only 2 types of vent pipe sold in the hvac market that for 90 plus and that for below 90.
Restrictions to flow and 6.
Heat loss in the vent 3.
In some cases transrite has been used which may contain asbestos.
Figure 2 typical fan assist category i furnace category i furnaces are the type most commonly used for residential heating.
In other words in a category i venting system if.
All vent installations must be in accordance with the latest edition provisions of the national fuel gas code ansi z223 1 section 7 and or can cga b149 installation codes or the vent tables.
0 025 thick type 430 stainless steel all supports and accessories.
Ul 1738 standard special gas vent for category ii iii iv appliances 2.
Single wall galvanized pipe 26 gauge is only used as a connector on 70 percent afue and lower gas appliances and all oil appliances.
Flue gas temperature flue gas temperature affects vent operation because the hotter the gases are the lighter they are.
There are many variables dictating how well a vent system will operate.
Ul 641 standard type l vent 3.
They include old fashioned gravity vent furnaces and the newer fan assisted plus 80 models also known as induced draft furnaces.
Category i central furnaces in canada this type of furnace is a conventionally vented vertical natural draft furnace with or without a drafthood.
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.
80 up to but not including 90 uses metel sectional pipe also known as and sold as double wall b vent amerivent and other names also single wall pipe.
1 25 thick cut rigid mineral wool dwkl vt only outer jacket.
304 stainless steel underwriters laboratories listings united states.
Vent system capacity 5.
Fan assisted and power vent category 1 furnace.
Vent connectors shall not be upsized more than two sizes greater than the listed appliance categorized vent diameter flue collar diameter or draft hood outlet diameter.
Venting guidelines for category i gas appliances single appliance vent tables 1 and 2 continued 10.
National fuel gas code nfpa 54 ansi z223.
Masonry will use vitreous clay liner.
