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30 Cards in this Set
- Front
- Back
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Min size fresh air intake and duct |
-4" diameter -insulated |
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Air tight building |
-type A |
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Loose construction |
Not airtight AKA type B |
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Is House is classified as type A or type B? |
Type A, allways air tight |
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Where does a type A building Get Air Supply from |
Require Air Supply from outside for the combustion and flue gas dilution |
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Where my type B buildings acquire Air Supply from |
Outdoors are all the air from indoors |
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Free area of transfer Grill in type B Building |
1sq" for every 1000 Btus of inout |
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Location of Grill to floor |
Min 6" Max 18" above floor |
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Where should second opening be placed in a room if the room has a draft Hood Appliance in type B bldg |
As close to the ceiling level as possible, but never lower than the lowest draft Hood relief opening and is the same size as the Air Supply opening |
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Where must fresh air be placed in type A bldg |
2 feet horizontally within one foot above the burner level over the appliance with the largest input |
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Motorized damper installed in a residence must be what? |
Certified this does not apply to commercial or industrial applications |
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The duct exceeds 20 feet to 50 feet the duct will be increased |
One size |
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outdoor Air Supply above grade |
Min 12 inch |
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Opening in an air supply screen door Grill no smaller than |
1/4" |
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How shall any mechanical Air Supply be interlocked with an appliance |
So the appliance will not fire if the supply fan fails |
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Minimum distance of service clearance required for an appliance |
Two feet on any side of an appliance that require Servicing |
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Minimum service clearance required for a boiler |
4 ft in front |
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Swimming pool boiler installed Outdoors clearance from property line |
18" |
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Appliance capable of lighting flammable valour in resi storage garage must be located___ above floor |
18" |
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Appliance capable of lighting flammable vapour in repair garage must be located___ above floor |
4-1/2 ft/ 54" |
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What must a infared tube heater be connected to gas line with, and how long must it be? |
Type 1 hose 36" long plus or minus 6" |
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Min and max length of infared tube heater hose |
Min: 30" Max:42" Want at 36" |
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Length of flex connector for a gas range, refrigerator or clothes dryer |
6 ft |
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Suspended appliances are decorative appliances connected to gas line using Flex connector max ___ ft long? |
2ft max |
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Max temp for limit control on forced air furnace |
250 degrees Fahrenheit |
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Max temp for limit control on a gravity furnace |
350° Fahrenheit |
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Category I Appliance |
-have draft hood -fan assist -certified for install of B vent -non positive pressure on vent system -Max 83% effecinet |
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Catagory II appliance |
-non positive vent -over 83% efficient |
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Catagory III appliance |
-positive vent pressure -can't use B vent Use BH vent (usually stainless steel venting) -3" diameter -Max combustion 83% -don't condense -can still condense in vent however so constructed of non corrosive -require limestone trap |
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Catagory IV appliance |
-positive vent pressure -combustion effecency over 83% -will condesne with water -Usually 2" s636 -require limestone trap |
