ITAZ RQ: Other Aspects of Heating Flashcards
List five characteristics of a good chimney.
Should adequately remove combustion products from the house
Should prevent poison gases from entering the house
Minimize the heat loss from the building
Adequately control the fire
Enhance appliance draft
List the five basic components of a masonry chimney.
Footing ad foundation Vent connector Chimney walls Flue liner Chimney cap
Why is condensation an issue in chimneys?
Condensation damages masonry
What is the maximum that a chimney can be offset from vertical?
30° maximum
How far should a masonry chimney extend above the roof line?
Three feet minimum and two feet above anything within 10 feet horizontally
What is the minimum total height for a chimney serving a wood stove?
Minimum 15 feet
When did masonry chimneys start to get built with clay liners?
Approximately the 1950’s
Generally speaking, how far should wood framing members be kept away from masonry chimneys?
Minimum two inches
Two wood burning fireplaces can share a single flue, as long as they are on the same floor level. (True or False)
False
What are two implications of abandoned openings for flue connections?
Fire hazard
Exhaust gas entry into house
B vents are typically used for what fuels?
Natural gas and propane
L vents are typically used for what fuels?
Gas and oil
List 12 common metal chimney vent problems.
Not labeled for application Sections not well secured Chimney /vent not well supported Inadequate clearance from the combustibles Inadequate fire stopping No cap, wrong cap or obstructive cap Warped, buckled or twisted chimney walls Busted or pitting Inadequate chimney height Creosote build-up Excessive offset from vertical Not continuous through roof
Metal chimneys that extend more than ______ feet above the roof should be laterally supported.
5
What part of metal chimneys often rust? (Give location)
Above the roofline
Define creosote
Tar like by product of incomplete combustion
Glass doors and outdoor combustion air for fireplaces are intended to:
Reduce the amount of house air that is drawn into the fireplace
List four types of electric heat.
Space heaters
Furnaces
Boilers
Radiant heating
Which is more dangerous, a 240 volt heater on a 120 volt circuit, or a 120 volt heater on a 240 volt circuit?
120 volt heater on a 240 volt circuit
What are common sizes for electric furnaces?
10-30 kilowatt, in 5 kilowatt increments
Can you see the elements on an electric furnace?
No
What is the typical temperature rise on an electric furnace?
50-60 degrees
What is a sail switch?
A switch that protects the elements from overheating by making sure there is adequate airflow across them
