Heat Loss And Heat Gain

Question 1

What do heat loss and heat gain calculations ensure?

Answer 1

Correct selection of equipment in order to provide comfort for the occupant

Question 2

What is the purpose of an air conditioning system

Answer 2

To Provide a high level of comfort to the home owner

Question 3

What are the 6 principles of comfort

Answer 3

Temperature, humidity, ventilation, filtration, circulation, noise

Question 4

What are the results of an undersized furnace

Answer 4

Won’t keep up with heating load

Question 5

What are the results of an oversized furnace

Answer 5

Poor temperature control and excessive operating costs

Question 6

What can happen after the equipment size is determined from the heat loss calculation

Answer 6

Duct design can be done

Question 7

Describe heat

Answer 7

Form of energy that flows between two bodies due to their difference in temperature

Question 8

Which direction does heat travel

Answer 8

Hot to cold

Question 9

What does 1 watt and 1 kw equal in BTUH

Answer 9

1 watt 3.41 BTUH

1kw 3412 BTUH

Question 10

Building environments are effected by what 4 factors

Answer 10

Building envelope, mechanical systems, appliances and occupants

Question 11

What separates the interior of a building from the outdoor environment

Answer 11

Building envelope

Question 12

What minimizes the heat lost or heat gained to the structure

Answer 12

Materials with high resistance and good vapour barriers

Question 13

Heat will continue to flow until a balance is reached

T or F

Answer 13

True

Question 14

What is the mechanical system used for

Answer 14

Maintaining the in-balance between indoor and outdoor conditions

Question 15

What does the mechanical system control

Answer 15

The temperature, air motion, humidification, filtration, exhaust and fresh air

Question 16

How do occupants control the mechanical systems and effect indoor climate

Answer 16

Opening and closing doors and windows and by using appliances

Question 17

How much heat to occupants generate approximately

Answer 17

250 BTUH (73 W) per person

Question 18

Air movement both inside and outside can affect the indoor climate

T or F

Answer 18

True

Question 19

What are air change rates reliant on to minimize leakage

Answer 19

Mechanical systems

Question 20

As leakage rates are reduced the need for___________and________ increases ?

Answer 20

Fresh air and exhausting of stale contaminated air

Question 21

How does air pressure flow

Answer 21

Higher pressure to an area of lower pressure

Question 22

What happens when a mechanical systems creates a low pressure within the building envelope

Answer 22

Higher pressure air on the exterior of the building envelope will flow inward through cracks and openings

Question 23

What effects do wind speed increases have on a building

Answer 23

Undesirable leakage which results in undesirable drafts and adds loads in either heat loss or gains for the building and its systems

Question 24

In Canada what guidelines do we need to follow or exceed

Answer 24

NBC (National Building Code)

Question 25

What guidelines do we follow in Alberta

Answer 25

(ABC) Alberta building code

Question 26

How is conduction accomplished

Answer 26

Through direct contact with another object

Question 27

What’s is a current in a liquid or gas that transfers heat by moving molecules from a warmer area to a cooler area ?

Answer 27

Convection

Question 28

What is transmitted through electromagnetic waves, which transfer heat from a hotter object to colder object,

Answer 28

Radiation

Question 29

Does cold air enter a building to lower the indoor temperature ?

Answer 29

No, heat travels outside to heat the outdoor temperature

Question 30

What is a buildings greatest heat loss

Answer 30

Windows and doors

Question 31

What are the two ways heat is lost by the mechanical system

Answer 31

Ducts passing through unconditioned spaces Ventilation air (fresh air and exhaust)

Question 32

What is effective temperature?

Answer 32

How a person feels at a set temperature

Question 33

How is air temperature controlled in a home

Answer 33

Thermostat

Question 34

Air movement effects the temperature you feel T or F

Answer 34

True

Question 35

What device measures relative humidity?

Answer 35

Higrometer

Question 36

A higher relative humidity percentage causes you to feel warmer T OR f

Answer 36

True

Question 37

What is the relative humidity of a room that’s 72 degrees Fahrenheit (22 c )

Answer 37

55%

Question 38

At the outside winter design temperature, required heating equipment shall be capable of maintaining an indoor air temperature no less than________?

Answer 38

72 •F (22 •C) in all living spaces 65 •F (18 •C) in unfinished basements 59 •F (15 •C) in heated crawl spaces

Question 39

Building codes set temperature for outside design T or F

Answer 39

TRUE

Question 40

What outside design temperature is used in Alberta

Answer 40

January at 2.5% values for winter design conditions

Question 41

Walls that are common to an attached garage must be treated as ?

Answer 41

Exposed

Question 42

What is the most accurate method of load calculation

Answer 42

Room by room loads

Question 43

What is thermal resistance ( R-Value)

Answer 43

Heat flow through an object in a specific amount of time

Question 44

The insulation value must match the wall value T or F

Answer 44

True

Question 45

What are below grade walls ?

Answer 45

Walls that are more than 2’ below grade

Question 46

Ducts passing through unheated spaces will have losses even if they are insulated T or F

Answer 46

True

Question 48

Are heat gain calculations required for below grade walls and crawl spaces?

Answer 48

No

Question 49

Building materials are heated by the sun and absorb heat energy causing a dramatic temperature rise, what is this called?

Answer 49

MASS EFFECT

Question 50

Do all locations in Alberta and most of Canada require solar adjustment

Answer 50

Yes