Cook Book B149.1 Section 8 Flashcards
(22 cards)
What is section 8
Venting systems and air supply for appliances
What tables are in section 8
8.1 Combustion air having draft control 400,000 or lower complies with 8.2.1
8.2 Combustion air not having draft control 400,000 or lower complies with 8.2.1
8.3 Combustion air having draft control 400,000 or lower does not comply with 8.2.1
8.4 Combustion air not having draft control 400,000 or lower does not comply with 8.2.1
8.5 Type of venting system to be used
8.6 Appliance vent connector clearances
8.7 Vent connector clearance reductions with specified forms of protection
What BTU for a single water heat does not need outdoor air supply
50,000
If combustion air duct is longer than 20 feet but less than 50 feet what do you do when using tables
Go up a size
When an appliance is within an encloser in a structure how is the combustion air sized
1” Per 1000 BTU for total input of all appliances
If it has a draft hood a second opening up at the ceiling the same size as the first is needed
Where should a combustion air duct terminate
8.3.1
1 foot above and 2 feet beside biggest burner
An air-supply inlet opening from the outdoors shall be located not less than ? in (300 mm) above the
outside grade level.
12 inches
Ventilation of the space occupied by an appliance or equipment shall be provided by an opening for
ventilation air where and how big
at the highest practicable point communicating with the outdoors
not within 12” of a combustion air opening
such an opening shall be at least 10% of the area required in Clauses 8.4.2 and 8.4.3, but in no case
shall the cross-sectional area be less than 10 in2
When the air supply is provided by natural airflow from the outdoors for an appliance and a venting
system with a draft control device is installed in the same space or enclosure, there shall be a
permanent air-supply opening having a cross-sectional area of not less than what
1 in2/7000 Btu/h
(310 mm2/kW) up to and including 1 000 000 Btu/h
plus 1 in2/14 000 Btu/h (155 mm2/kW) in
excess of 1 000 000 Btu/h
When air supply is provided by natural airflow from outdoors for an appliance and a venting system
without a draft-control device is installed in the same space or enclosure, there shall be a permanent
air-supply opening having a total cross-sectional area of not less what
1 in2 for each 30 000 Btu/h
When air is provided by natural airflow from outdoors into a space or enclosure containing both types
of appliances or venting systems described in Clauses 8.4.2 and 8.4.3, the cross-sectional area of the
opening shall not be less than what
the sum of the required cross-sectional areas for all types of appliances
Apertures in a fixed louvre, grille, or screen shall have no dimension smaller than what
0.25 inch
Where does a vent need to terminate out of a roof
a vent shall extend not less than 2 ft
(600 mm) above the highest point where it passes through a flat roof of a building and not less than 2 ft
(600 mm) higher than any portion of a building within a horizontal distance of 10 ft (3 m).
Where to find A vent shall not terminate in 8
8.14.8
When calculating combustion air supplied by both draft and non draft appliances what charts and totals do you use
Complies with 8.2.1
All with draft control together 8.1
All appliances with and without draft together 8.2
When calculating combustion air supplied by both draft and non draft appliances what charts and totals do you use
Not compiling with 8.2.1
All with draft control together 8.3
All appliances with and without draft together 8.4
An air-supply opening shall not be located within what foot ft (1 m) of a moisture exhaust duct.
3 feet
Where to find For emergency generators, stand-by generators, or firewater pumps, the combustion air damper
interlock is not required, provided
8.5.6
Where to find incinerator vent type
8.10.11
Where to find chimney rules
8.12
Where to find vent terminations
8.14
When connecting two vents on a common vent chimney which goes where
Small connector or smallest btu on top
