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Gas > Venting > Flashcards

Venting Flashcards

1
Q

Clearance for b-vent to combustibles

A

1 inch

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2
Q

Clearance for c-vent to combustibles

A

6 inch’s

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3
Q

What in b-vent made of

A

Aluminum inner wall galvanized on the outer wall

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4
Q

Are you aloud to screw into b-vent

A

Yes if you use 1/4 inch screw so it dose not pierce the inner tube/ the aluminum inner liner

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5
Q

Effective venting heights minimum allowance is

A

5 feet/1.5 meters is the minimum distance allowed

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6
Q

A category 1 appliance operates with a non-positive vent static pressure and a flue loss of no less then

A

17%

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7
Q

A category 2 appliance operates with a non-positive vent static pressure and a flue loss of less then

A

17%

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8
Q

Function of a draft control device

A

The draft control device neutralizes the effect of stack action in the flue when an appliance is operating

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9
Q

Excess stack action can lift what

A

Flames from burner

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10
Q

When the vent becomes cool what happens

A

Will cause the natural up flow to stop

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11
Q

When the vent becomes cool what is it called

A

Cold vent

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12
Q

A kitchen exhaust fan causing a negative pressure in the house will lead to

A

Air be then sucked down threw the vent

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13
Q

What is the difference between a single acting and double acting barometric dampers

A

Single acting barometric dampers only swings one way inwards double acting opens both ways to allowing it to bring stuff in or out

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14
Q

How many type of barometric dampers are there and what are the types

A

2 types single acting and double acting

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15
Q

What shape can a vent be

A

Venting can be any shape as long as it equals the capacity of a round pipe

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16
Q

How high must your vent be when coming out the roof

A

Must extend 2 feet above the roof on a flat roof and on a sloped roof it must extend 2 feet higher then any portion of the roof within 10 feet

17
Q

Chimney must extend above the roof or the highest point where it passes through the roof a minimum of

A

3 feet

18
Q

What is L vent used for

A

High efficient oil burner unit

19
Q

Be vent is what shape and why is this

A

Be vent is oval shaped this is to allow it to go threw 2x4 wall it must switch to round once it get to roof connection

20
Q

Appliances the burn sold or liquid fuels cannot connect to a vent be should be connected to a

A

Approved chimney

21
Q

What are the types of chimneys

A

Factory built chimneys and feild constructed chimneys

22
Q

What are factory built chimneys built by a and super a

A
23
Q

What is the size of the spacing in A vent

A

1 inche

24
Q

What is the spacing in super A vent

A

2 inche

25
Q

How many differnt GVRs are there

A

16

26
Q

What number do you times you offsets by in venting

A

1.5 times your diameter

27
Q

What dose ROT stand for

A

Rule of thumb

28
Q

If you had a 17 foot vent would you round down or up

A

Down to 15

29
Q

All draft hood must be installed as per the

A

Manufacturers certified installation instructions

30
Q

A moisture exhaust duct from clothes dryer must not be fastened with what but can be fastened with what

A

You can’t use sheetmetal screws but you can you approved tape

31
Q

Fan assisted units venting is what gauge

A

24 GSG (gauge)

32
Q

A double wall type B vent material my be used for the connector between

A

The draft hood of an appliance and its chimney/vent

33
Q

Single wall vent connecter is not aloud to go through what

A

Floors or ceilings

34
Q

Single wall vent connectors are aloud to pass threw

A

Walls provided that the combustible material must be guarded with non combustible insulation and clearance that do not allow the material to exceed 194f (90c)

35
Q

C1 and C2 tables are used for

A

Single category 1 appliance

Gas (2 decks)

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