Natural Ventilation And Energy Efficient Buildings

Question 1

Natural ventilation uses what 2 basic natural forces?

Answer 1

Wind effect
Buoyancy effect

Question 2

What is the high or positive pressure side of a building called ?

Answer 2

Windward ( positive pressure )

Question 3

What is the low or negative side of a building called?

Answer 3

Leeward ( Negative pressure )

Question 4

Name 3 types of openings for natural ventilation?

Answer 4

Windows/doors , roof ventilators and ridge vents

Question 5

Inlet openings should be located where?

Answer 5

Windward side near the bottom

Question 6

Outlet openings should be located where on a building?

Answer 6

Leeward side as high as possible

Question 7

What is “ R value “ described as?

Answer 7

Ability to resist heat

Question 8

Which heat pump is most common?

Answer 8

Air - Air heat pump

Question 9

What type of heat pump uses the ground or ground water as a source of energy?

Answer 9

Earth energy system ( EES )

Question 10

What piece of equipment captures heat from exhaust air and transfers it to fresh air entering a building?

Answer 10

HRV - heat recovery ventilators

Question 11

What component of a HRV / ERV constitutes the difference in how they work?

Answer 11

Heat exchanger operation

Question 12

3 forms of solar energy?

Answer 12

Direct radiation, diffused radiation and albedo radiation

Question 13

How many types of energy sources are there?

Answer 13

5

Question 14

Name 2 types of solar space heating and the given name for the combination of these 2 systems?

Answer 14

Passive system
Active system
Hybrid system

Question 15

Name a renewable energy resource that is derived from living organisms and their byproducts

Answer 15

Bio energy

Question 16

How many energy agencies are there?

Answer 16

4

Question 17

Name the physical components of the building envelope?

Answer 17

Foundation
The roof
Walls
Doors

Question 18

Is it recommended to rely on air leakage for ventilation?

Answer 18

No, it can’t be controlled

Question 19

What is the primary function of a roof ventilator?

Answer 19

Provide weatherproof air outlet

Question 20

What’s the purpose of attic ventilation?

Answer 20

Remove moisture from air to minimize moisture buildup

Question 21

What does a passive solar system rely on to gain heat energy?

Answer 21

Properly oriented windows

Question 22

Term used when air enters a building through cracks and openings?

Answer 22

Infiltration

Question 23

2 purposes for providing ventilation?

Answer 23

Maintaining occupant comfort
Maintaining occupant health

Question 24

What pressure will be on the Windward side of the building?

Answer 24

Positive

Question 25

Two main forces that influence natural ventilation

Answer 25

Pressures from the wind ( wind effect )
Indoor outdoor temperature differences ( buoyancy effect )

Question 26

Maximum width that you could expect to ventilate naturally is estimated at__Ft

Answer 26

45Ft

Question 27

Ideal roof slope is?

Answer 27

1 in 3

Question 28

2 advantages of using natural ventilation?

Answer 28

Doesn’t use energy
Safe to use with animals

Question 29

Disadvantages of natural ventilation?

Answer 29

Airflow Can’t be controlled in the structure
Building location might not be ideal
It’s difficult to remedy problems