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56 Cards in this Set

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Single wall vent connector gage

28 gage smaller than 6"

If portions of vent connector have no dilution air min gage of

24

Incinerator min gage

20 gage for vent connector

Aluminum vent connectors

-22 B&SG (Brown and sharp gage)


-3“-5“

Single wall vent connector min clearance from combustibles

6"

Type B vent min clearance from combustibles

1"

Can a single wall vent connector pass through floor or ceiling?

No

When is the ONLY time a single wall vent connector may pass through a wall?

If protected with ventilated thimble

Vent must be ___ higher than a roof, and ___ higher than any obstruction within ___?

1) 2 ft


2) 2 ft


3) 10 ft

Chimney must be ___ higher than a roof, and ___ higher than any obstruction within ___?

1) 3 ft


2) 2 ft


3) 10 ft

Vent terminating and passing through wall must be ___ above grade?

1 ft

What is BH vent

Is CPVC mus be system s-636 certified


Has positive vent pressure

BH vent must be ___ higher than a roof, and ___ higher than any obstruction within ___? Aka special venting system

1) 18"


2) 18"


3) 18"

ROT for sizing single appliance vent

Vent connector and vent, same size appliance flu collar or draft hood outlet

ROT for sizing single appliance for chimney

Vent connector same size as appliance flue collar or draft hood outlet. Chimney is one size larger

ROT sizing for tro or more appliances for vent

Vent connector for each appliance same size as appliance flue collar or draft hood outlet.



Vent are sized by taking all the areas of largest vent then adding half the area of the rest

ROT sizing for two or more appliances for chimneys

Vent connector for each appliance same size as appliance flue collar or draft good outlet



Chimney area sized by using area of largest vent than adding half the area of the rest

Min size of vent

-3" diameter



-apply to catagory I apiances only other appliances are sized by manufacturers code

Direct vent appliances uses what kind of vent pipe arrangement

Coaxial pipe: vents products of. Combustion through a pipe inside another pipe that brings combustion air


Ex. Decorative fire place

Direct vent appliances below grade may use a ___ fitting

Snorkel fitting

How high above finished grade must vent be?

12"

Power assisted vents

Vents that once been connected to B vent to vent though the roof. They have ben modified to vent through a wall.

Only plastic pipe allowed for use today for venting

S-636


*first 3ft of vent pipe must be vissible

Only auto damper allowed to be added to appliance is ____, other whose it must come with it installed

Thermal activated

Are manual dampers permitted in a venting system?

No

Vents with psoitve vent pressure( catigorie III & IV) must run independently to outdoors

True, may not be connected together

Can a vent with positive vent pressure be connected to any natural draft vent (type B) or to a venting system for draft hood equipped appliances?

No

Drafthoods / draft control devices are used to maintain

Steady negative pressure

Draft control devices include

Draft hoods and draft regulators smlike the barometric type

What's a barometric draft regulator

-Like draft hoods


-Relife opening has floating plate or gate that constantly adjust amount of dilution air, maintain desired vent pressure

Three basic draft hood designs

-Verticle


-horizontal


-horizontal and verticle (angle)

Single acting baromateic regulator:

-gate swings inward only on negative pressure


-used in solid fuel burning apications

Double acting baromateic regulator

- gate swings inwards AND outward depending on vent pressure


-used in converted appliances

Does a mid and high efficiency appliance have a draft control device?

No

Main function of draft hood

-allows escape of flue gas under abnormal vent conditions


-prevent back draft from enterinf combustion chamber


-neutralizes excessive stack action


-dilutes products of combustion


-Helps room vent

GSG stands for

Galvanized steel gage

When can vent connector be type B

Where extreme vent connector cooling and condensation is a problem

Vent grade

1/4“ per ft

Combustible surface temps max

194 degrees F

Vents passing through wall need ventilated thimble __ or larger in diameter than vent.

-4"


-needed when distance from appliance to pen point is less than 6 ft

Vents passing through wall need ventilated thimble __ or larger in diameter than vent.

-2"


-needed when distance from appliance to pen point is 6 ft or greater

Dampers in vent connectors may be

Thermal operated type

Manifold sizing/common vent

Area all vents, add total than square root



Round up for pipe size if need

Can you use rule of thumb sizing method for sizing fan assist

-no


-only for natural draft appliances

Where should the smallest sized vent connector be connected to a a vent or chimney

At the top, above all larger vents. Same applies for fan assist. However if both fan must be lowest connection

Can a B vent pass through wall

Yes

Air tight building refered to as

Type A bldg

Loose building reford to as

Type B bldg

Min size masonry chimney

12“ sq

Where can appliance in a commercial kitchen be vented to

Exhaust canopy

Catagory I appliance

- operates with a non-positive vent pressure and is with a vent gas temperature of at least 140F above its dew point


-all draft hood equipped appliances, all fan assist labelled as cat 1 and all appliances certified for venting into b vent

Catagory II appliance

-operates with a non-positive vent pressure and with a vent gas temperature less than 140 F above dew point


-measured at entrance of venting system 300F


Higher efficiency apiances than catagory I


-still has slight negative pressure in the venting system

Catagory III appliance

-operates with positive vent pressure and with a vent gas temp Atleast 140F above dew point


-measured at entrance to the vent systen


-non condensing type appliance usually 3" plastic, 3" ss venting system


-may have some condensation so vent needed

Catagory IV

-operates with positive vent pressure and vent gas temp less than 140F above dew point


-measured at the entrance to venting system


-condensing high efficient appliance usually have 2" plastic venting system and a drain

Vent terminate

-7ft from driveway / paved sidewalk public prop


-6ft from mech air supply inlet to any building


-above regulator: 3ft from center and 16 ft up

Flue gass discharge opening for outdoor pool heater shall terminate no less than ___ ft from any building opening.

10ft