Venting Flashcards
Clearance for b-vent to combustibles
1 inch
Clearance for c-vent to combustibles
6 inch’s
What in b-vent made of
Aluminum inner wall galvanized on the outer wall
Are you aloud to screw into b-vent
Yes if you use 1/4 inch screw so it dose not pierce the inner tube/ the aluminum inner liner
Effective venting heights minimum allowance is
5 feet/1.5 meters is the minimum distance allowed
A category 1 appliance operates with a non-positive vent static pressure and a flue loss of no less then
17%
A category 2 appliance operates with a non-positive vent static pressure and a flue loss of less then
17%
Function of a draft control device
The draft control device neutralizes the effect of stack action in the flue when an appliance is operating
Excess stack action can lift what
Flames from burner
When the vent becomes cool what happens
Will cause the natural up flow to stop
When the vent becomes cool what is it called
Cold vent
A kitchen exhaust fan causing a negative pressure in the house will lead to
Air be then sucked down threw the vent
What is the difference between a single acting and double acting barometric dampers
Single acting barometric dampers only swings one way inwards double acting opens both ways to allowing it to bring stuff in or out
How many type of barometric dampers are there and what are the types
2 types single acting and double acting
What shape can a vent be
Venting can be any shape as long as it equals the capacity of a round pipe
How high must your vent be when coming out the roof
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
Chimney must extend above the roof or the highest point where it passes through the roof a minimum of
3 feet
What is L vent used for
High efficient oil burner unit
Be vent is what shape and why is this
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
Appliances the burn sold or liquid fuels cannot connect to a vent be should be connected to a
Approved chimney
What are the types of chimneys
Factory built chimneys and feild constructed chimneys
What are factory built chimneys built by a and super a
What is the size of the spacing in A vent
1 inche
What is the spacing in super A vent
2 inche
How many differnt GVRs are there
16
What number do you times you offsets by in venting
1.5 times your diameter
What dose ROT stand for
Rule of thumb
If you had a 17 foot vent would you round down or up
Down to 15
All draft hood must be installed as per the
Manufacturers certified installation instructions
A moisture exhaust duct from clothes dryer must not be fastened with what but can be fastened with what
You can’t use sheetmetal screws but you can you approved tape
Fan assisted units venting is what gauge
24 GSG (gauge)
A double wall type B vent material my be used for the connector between
The draft hood of an appliance and its chimney/vent
Single wall vent connecter is not aloud to go through what
Floors or ceilings
Single wall vent connectors are aloud to pass threw
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)
C1 and C2 tables are used for
Single category 1 appliance
