chapter7 - Energy building performance Flashcards
List three ways in which we can save money and help the environment in the home
1, switching off- turning off appliance rather than leaving them off can save £80 on electric bill
2- draft excluders - in most homes you will lose heat through doors and windows, draft excluding your home can save £35 a year on energy bill
3- kitchen care- only boil kettle when needed, use a wash bowl rather than use a tap, cut back on washing loads can save £50 a year
List 3 more ways in which we can save money and help the environment in the home
1-shower head, fitting a water efficient shower head can save £67 a year on heating
2- time in the shower, spend one minute less in the shower will save £10 on your energy bill per year per person
3- controlling the thermostate- having the temperature set at 1 degree lower can save £90 a year
list another 3 ways to help save money in homes and help the environment
1- turning of lights when there not needed
2- generate renewable energy through heat pumps solar thermal heating etc
3- switching lights- switching from filament bulbs to efficiency bulbs can save alot of money
describe how insulation influences the energy efficiency of a building
When there is a temperature differential from outside to inside the home heat escapes the building envelope this is why we need insulation. Especially in roofs and walls as they lose the most amount of heat.
describe how airtight building boosts efficiency
With air tight building it boosts effeciency by lowering energy bills, fewer drafts and less chance of mold.
describe how glazing effects house efficiency
AS 12% of all heat loss in the home comes from the windows it is a good idea to get double or tripled glazed windows to stop as much heat leaking out, however triple is more expensive
What is another name for the “ U value”
Thermal transmittance
What does the “u value” tell us
The U value tells us about a material ability to transmit heat from one point
to another.
Do construction materials have different u values
Yes different materials have different u values
What is the unit for u value
W / m2 / K
What is the rate of heat flow formula
(give units)
rate of heat flow = u value x area x temp difference
Q = U x A x ∆T
Q=w
U=W / m2/ K or W / m2/ °C
A=M2
∆T= k or °C
What is the zero carbon hierarchy from top to bottom
Allowable solutions
on site low carbon,heat and power
Fabric energy effeciency
How can we achieve zero carbon
1- good fabric energy effeciency
2- inclusion of on site low carbon heat and power technologys
3- Use of Allowable Solutions to compensate for carbon emissions that are
difficult to achiever on site.
what is the zero carbon policy
The Zero Carbon Buildings policy forms part of the Governments wider
strategy to achieving the Climate Change Act targets (reduction of 1990 baseline levels by 80% by 2050).
What does the zero carbon policy require and what typed of regulated energy use does this include
This Zero Carbon Buildings policy requires all new homes from 2016 to
mitigate, through various measures, all the carbon emissions on site as a result
of the regulated energy use.
This regulated energy use includes energy used to provide space heating
and cooling, hot water and fixed lighting.
