think energy lunchtime talk presentation
Post on 08-Aug-2015
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Heat losses from an un-insulated house
Roof
30%
Windows
& doors
20%
Ventilation
15%
Floor
10%
Walls
25%
Saving energy at home
• Heating
• Lighting
• Electrical appliances
Do you know how much your bills are?
Typical energy bills
• Electricity 22c per unit (kWh)
– Annual bill ~ €1200
• Gas 7c per unit (kWh)
– Annual bill ~ €1300
Reducing heating costs - insulation
Payback periods
Hot water tank
< 6 months
Loft insulation
2 years
Cavity insulation
4 years
Double glazing
> 20 years
Floor insulation
2 years
Draught proofing
4 years
Saving energy: hot water
• Hot water cylinders
• Showers vs baths
– Shower timers
• Full washing loads
• Wash at 30C
• Filling kettles
Reading your meters
0
10
20
30
40
50
60
70
80
90
100
July 1
July 2
July 3
July 4
Aug
1
Aug
2
Aug
3
Aug
4
Sep
1
Sep
2
Sep
3
Sep
4
Oct 1
Oct 2
Oct 3
Oct 4
0
1
2
3
4
5
6
7
Electricity
Gas
Away on holiday
Visitors
Standby energy
• 8% of total electricity demand used overnight
• Switch off at the wall
• Red standby light uses energy
Standby consumption Home Electrical Equipment
Power Consumption (W)
On and active On but inactive Standby Off
Computer and peripherals:
Computer box 80 55 2
Cathode-ray display 110 3 0
LCD display 34 2 1
Laser printer 500 17
Wireless & cable-modem 9
Laptop computer 16 9 0.5
TV 100 10
Digital radio 9.1 3
Digital TV set top box 6 5
DVD player II 12 10 5
Xbox 160 24
Sony Playstation 3 190 2
Ninetendo Wii 18 2
Mobile phone charger 5 0.5
Vacuum cleaner 1600
Source: www.withouthotair.com
Reduced annual energy bills
= €128.48 x 4 hours
a day
x 22c
/kWh
x 4 hours
a day
x 22c
/kWh = €14.13
x 365 days
x 365 days
4 x
(100W)
4 x
(11W)
Replacing incandescent with CFL (compact fluorescent)
Reduced annual energy bills
= €64.24 x 4 hours
a day
x 22c
/kWh
4 x (50W)
x 4 hours
a day
x 22c
/kWh 4 x
(5W) = €6.24
x 365 days
x 365 days
Replacing halogen with LED (light emitting diode)
Keep it cool
• Set nearer 5 degrees C than zero • Avoid putting hot food into
fridge or freezer • Food safety first
Appliances - buying
• When buying new white goods
– EU label rating
– Annual energy consumption
– Annual cost to run
• Water usage for washing machines
Appliances - using
• Use existing items sensibly
– Check usage of an item
– Minimise tumble dryer use
– Don’t overfill the kettle
Saving energy: top tips
• Switch to energy efficient lights
• Draught proof doors and windows
• Control your heating
• Don’t leave electrical items on standby overnight
• Fit a hot water tank jacket
• Energy monitors to find how much each appliance uses
Further information
http://www.seai.ie/Power_of_One/ http://www.seai.ie/Grants/Better_energy_homes/
www.codema.ie/thinkenergy
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