C1- Heat Gain & Loss

Question 1

Thermal bridges:
Are _________ in a building with a very ______________________________.

Answer 1

areas
high thermal conductivity

Question 2

Fabric heat loss:
Loss of heat via ____________ of _______________.

Answer 2

conduction
building materials

Question 3

Ventilation Heat Loss:
Warm air escaping through ______ of a building.

Answer 3

gaps

Question 4

In a busy office where doors keep opening and closing, the __________________________ will increase.

Answer 4

ventilation heat loss

Question 5

Contribution of air change to heat loss:
Is the _______ of air inside a building being ___________.

Answer 5

rate
replaced

Question 6

What is radiant heat?
Heat from a _________________ that __________ across a room.

Answer 6

hot stovetop
spreads

Question 7

What are the 4 main factors of heat gain/loss?
1.
2.
3.
4.

Answer 7

1. Insulation.
2. Local climate.
3. Temperature difference.
4. Building use.

Question 8

What is U-value another word for?

Answer 8

Thermal transmittance

Question 9

In older buildings, draught increases the exchange between warm interior air and cold exterior air leading to heat loss.
How do we carry out draught reduction?

Answer 9

Sealing gaps around windows and doors.

Question 10

Traditionally, why are radiators installed near the floor?

Answer 10

Because cold air sinks towards the floor.

Question 11

Low emissivity glass reduces heat loss by _____________________ back into a room.

Answer 11

reflecting radiant heat

Question 12

How can air changes alter the temperature inside retail units with a glazed curtain wall:
The _______________ is ____________ by ____________________ from outside the building.

Answer 12

heated air
replaced
cold air entering

Question 13

Triple glazing of windows lowers what?

Answer 13

U-value.

Question 14

Thermally insulating materials reduce the effects of _______________ through the external envelope of a building.

Answer 14

conduction