Appliance Venting Part A And B Flashcards
What is a category 1 appliance
Operates with a negative vent static pressure and a flue loss of no less than 17%
What does category 1 appliances consist of?
Draft hood equipped appliances, and fan assisted appliances for venting into B vents
What is a forced draft
A mechanical draft produced by a device upstream from the combustion zone
What is induced draft
A mechanical draft produced by a device DOWNSTREAM from the Comobution zone
Natural draft is?
Any draft other than mechanical
Another name for stack action, what is it?
Motive power, the suction in the flue caused by the products of combustion
What is the most biggest problem with venting
Condensation
2 types of barometric draft controls
Single acting and double acting
What does a double acting barometric act do and how does it work
Swings 2 ways inwards and outwards, when it swings inwards, it lets diluation air in, if spillage occurs the damper swings outwards allowing combustion into the mech room rather then back to combustion zone
What does a single acting barometric damper do and how does it work
Only swings inward, allows dilution AIT into the vent
Barormatric damper can only be used appliances that have what?
Been certified by the manufacturer for such use
How can venting gas appliances be accomplished.
Through convection or mechanical induction. Mechanical uses a
What is the total vent height
Min of 5’ft measured from the height of the draft hood or flue collar to where it vents outside
What is b vent made of
Inner lining is made of aluminum the outer wall is constructed of galvanized iron
Maximum allowable flue gas temp for b vent
470f°
