Book 29 Ventilation

Question 1

what is ventilation?

Answer 1

the systematic removal of heat, smoke, and fire gases from a structure

Question 2

Effective ventilation will accomplish 4 objectives

Answer 2

save lives
assist in firefighter access
control the horizontal spread of fire
reduce the possibility of flashover or backdraft

Question 3

Save lives

Answer 3

-increase the chances of survival to trapped or unconscious occupants
-makes interior conditions safer for firefighters and improves visibility for rescue

Question 4

Firefighter access

Answer 4

-permits firefighters to safely and more rapidly locate and extinguish the fire
-reduces heat and improves visibility

Question 5

Control the horizontal fire spread

Answer 5

-heat, smoke, and fire gasses will accumulate at the highest point of the structure and bank down laterally (mushrooming)
-proper ventilation will reduce mushrooming which will reduce the rate of fire spread

Question 6

Reduces the possibility of flashover and backdraft

Answer 6

FLASHOVER:
-proper ventilation helps eliminate flashover conditions by removing the heat
BACKDRAFT:
-proper ventilation helps removes backdraft conditions by removing the heat

Question 7

Flashover

Answer 7

where all contents of a room are heated to their ignition temperature and ignite