G2 Gas Technician Module 13 Revised
If inadequate combustion air is in a tightly sealed house what happens? -
ANS-Potenially leads to severe indoor air quality problems
When changing a part of the heating system what 4 factors must the gas technician
take into account? - ANS-The building envelope, external environment, mechanical
systems, and occupants
What comprises the building envelope? - ANS-Foundation and floor slabs, walls, roofs,
and windows and doors
What does the skin in the building envelope do? - ANS-Protects the underlying material,
maintains building integrity and reduces heat loss and heat gain
What is the function of the vapour barrier? - ANS-It is used to maintain proper humidity
levels inside the house. In winter if not present the relative humidity will decrease
causing it to feel colder then it is.
What does insulation do? - ANS-It is a poor conductor of heat and will prevent the ex
filtration indoor heat to the outside.
Name 2 signs of poor attic ventilation. - ANS-Curling shingles in summer and icicle
dams in the winter
What is the function of the air barrier and where is it located? - ANS-The air barrier is
located between the bricks and wood studs. It allows moisture to be removed through
venting.
What are three types of building construcion? - ANS-Balloon frame, Double/solid brick,
platform (most common)
How do occupants affect the building system? What are some actions that do this? -
ANS-As the more occupants increase the relative humidity will also increase. Cooking,
bathing, smoking and plain old breathing.
Mechanical impact consist of equipment and appliances within the building. Name a
few. What should the gas tech consider? - ANS-Water heaters, dryers, motors,
If inadequate combustion air is in a tightly sealed house what happens? -
ANS-Potenially leads to severe indoor air quality problems
When changing a part of the heating system what 4 factors must the gas technician
take into account? - ANS-The building envelope, external environment, mechanical
systems, and occupants
What comprises the building envelope? - ANS-Foundation and floor slabs, walls, roofs,
and windows and doors
What does the skin in the building envelope do? - ANS-Protects the underlying material,
maintains building integrity and reduces heat loss and heat gain
What is the function of the vapour barrier? - ANS-It is used to maintain proper humidity
levels inside the house. In winter if not present the relative humidity will decrease
causing it to feel colder then it is.
What does insulation do? - ANS-It is a poor conductor of heat and will prevent the ex
filtration indoor heat to the outside.
Name 2 signs of poor attic ventilation. - ANS-Curling shingles in summer and icicle
dams in the winter
What is the function of the air barrier and where is it located? - ANS-The air barrier is
located between the bricks and wood studs. It allows moisture to be removed through
venting.
What are three types of building construcion? - ANS-Balloon frame, Double/solid brick,
platform (most common)
How do occupants affect the building system? What are some actions that do this? -
ANS-As the more occupants increase the relative humidity will also increase. Cooking,
bathing, smoking and plain old breathing.
Mechanical impact consist of equipment and appliances within the building. Name a
few. What should the gas tech consider? - ANS-Water heaters, dryers, motors,
