Ventiltion And Effcient Buildings

Question 1

What is natural ventilation

Answer 1

Is the process of supplying and removing air by the means of purposely installing opening like windows mixing the natrual forces of wind and temperature/different pressures

Question 2

What are the two main purposes for providing ventilation

Answer 2

Maintaining occupant comfort and health

Question 3

What are the two main forces that influence natural ventilation

Answer 3

Pressure from the wind
Indoor/outdoor temperature difference

Question 4

3 things used in natural ventilation

Answer 4

Windows, doors, roof ventilators, ridge vents

Question 5

What will the pressure on the windward side of a building be

Answer 5

Positive

Question 6

What is stack effect

Answer 6

When air movement is a result of temperature difference between the inside and outside flow of air is in the vertical direction and is along the path of least resistance the temp difference causes density differentials and therefore pressure differences that drive air forward

Question 7

The function of a roof ventilator

Answer 7

To provide a storm and weather proof air outlet

Question 8

4 factors have effect on the capacity of a roof ventilator

Answer 8

The location of the ventilator on the roof, the resistance from the ductwork to the airflow, height of the draft, the efficiency of the ventilator

Question 9

Best spot for a roof ventilator to get the best efficiency

Answer 9

Where it has constant negative pressure

Question 10

What is a ridge vent

Answer 10

A ridge vent is at the highest point of the roof making for good buoyancy and wind induced ventilation

Question 11

What are the preferred locations for natrual ventilation

Answer 11

The opening on the windward side should be located as low as possible and the opening on the leeward side should be as high as possible

Question 12

What should the maximum width of an agricultural building be when considering natural ventilation

Answer 12

45ft

Question 13

What are the two types of heat pumps

Answer 13

Air-air heat pump
Air-water heart pump

Question 14

What is the function of a heat pump

Answer 14

A heat pump is an electrical device thats main purpose is to extract heat from one place and transfer it to another

Question 15

What component of the heat pump makes the change from heating mode to cooling mode

Answer 15

The 4 way reversing valve

Question 16

How many cycles does a heat pump have?

Answer 16

3

Question 17

What function does an HRV perform?

Answer 17

HRV is device that captures the heat from the exhaust air from a building and transfers it into the fresh air, entering the building to preheat the air and increase overall heating efficiency

Question 18

What are two types of ground source heat pumps

Answer 18

Open loop system
Closed loop system

Question 19

What is solar energy

Answer 19

Is radiant energy that is produced by the sun

Question 20

List, three forms of solar energy

Answer 20

Direct radiation, diffused radiation, albedo

Question 21

Two types of solar collectors

Answer 21

Non-concentrating flat plate collectors,
Vacuum envelope collector

Question 22

The difference between a passive solar system, and an active solar

Answer 22

An active solar home uses mechanical equipment, such as pumps and blowers, and on outside source of energy to help heat the house when solar energy is not

Question 23

For energy agencies that are discussed in this module

Answer 23

Internal energy agency, the office of energy efficiency, climate change, central, carbon dioxide reduction Edmonton

Question 24

What are the main benefits of improving energy efficiency of a building?

Answer 24

Benefits of energy retrofits are that they improve the energy efficiency of your home or business and improve the comfort of living

Question 25

What function does a building envelope perform?

Answer 25

The purpose of a building envelope is to provide a separation between the interior and the exterior environment of the building

Question 26

Why is ventilation important in a tightly sealed building?

Answer 26

Unless properly ventilated an airtight home, can seal in outdoor air, pollutants ventilation also helps control moisture, which is another important consideration for health and efficient homes

Question 27

The four major performance objectives of building envelope

Answer 27

Structural integrity, moisture control, temperature control, control of air pressure and boundaries of sorts