There are many possible energy efficiency projects possible. Calculate
which one has the greatest return. I have created online calculators
to work this out. Make a priority list of easiest or cheapest changes
to implement. Start saving power, money and water.

Calculate your individual potential savings.
http://www.matthewb.id.au/media/Ligh...alculator.html
http://www.matthewb.id.au/media/Comp...alculator.html
http://www.matthewb.id.au/media/Elec...alculator.html
http://www.matthewb.id.au/media/Elec...alculator.html
http://www.matthewb.id.au/media/Hot_...alculator.html
http://www.matthewb.id.au/media/Sola...alculator.html

See if you have implemented all possible savings.
http://www.matthewb.id.au/media/Save...Checklist.html

More information also on the website
http://www.matthewb.id.au/

Best Wishes

matthewb wrote:
There are many possible energy efficiency projects possible. Calculate
which one has the greatest return. I have created online calculators
to work this out. Make a priority list of easiest or cheapest changes
to implement. Start saving power, money and water.

Calculate your individual potential savings.
http://www.matthewb.id.au/media/Ligh...alculator.html

Good idea. Needs some work though, 3 issues cropped up...
First you've got the power equivalents wrong for cfl versus
filament. 3:1 for spotlights, 4:! for others. The equivalents on the
boxes arent compared to GLS lighting, and are deliberately
unrealistic.
2nd you've not taken account of downlighting versus other methods,
downers are an exceptionally inefficient way to distribute light.
3rd your calculator seems to assume that all lights are on and off for
the same number of hours per day, which is far from realistic.
4th I dont recall seeing tubular filament on there. Many of us still
have them here, and energy efficiency of those is much worse than GLS.

Has a lot of potential if these bugs are ironed out.


http://www.matthewb.id.au/media/Comp...alculator.html
http://www.matthewb.id.au/media/Elec...alculator.html
http://www.matthewb.id.au/media/Elec...alculator.html
http://www.matthewb.id.au/media/Hot_...alculator.html
http://www.matthewb.id.au/media/Sola...alculator.html

See if you have implemented all possible savings.
http://www.matthewb.id.au/media/Save...Checklist.html

More information also on the website
http://www.matthewb.id.au/

Best Wishes

On Sun, 18 Jan 2009 15:53:02 -0800 (PST), matthewb wrote:
There are many possible energy efficiency projects possible. Calculate
which one has the greatest return. I have created online calculators
to work this out. Make a priority list of easiest or cheapest changes
to implement. Start saving power, money and water.

Calculate your individual potential savings.
http://www.matthewb.id.au/media/Ligh...alculator.html
http://www.matthewb.id.au/media/Comp...alculator.html
http://www.matthewb.id.au/media/Elec...alculator.html
http://www.matthewb.id.au/media/Elec...alculator.html
http://www.matthewb.id.au/media/Hot_...alculator.html
http://www.matthewb.id.au/media/Sola...alculator.html

See if you have implemented all possible savings.
http://www.matthewb.id.au/media/Save...Checklist.html

More information also on the website
http://www.matthewb.id.au/

Best Wishes

You've obviously put a lot of work into this, but I can't help feeling
you're focussing on the wrong things.
The government runs a website for checking the energy efficiency of your
house. They concentrate on the big issues: such as loft insulation,
cavity wall insulation, double glazing - rather than switching to CFLs
or turning your computer off.
Take a look at www.energysavingtrust.org.uk/check to get a breakdown of
the cost/benefits of various measures. You can also re-run the survey
with different parameters, to do a "what if" comparison.

p.s. for electrical appliances, a rough guide is a cost of £1 per Watt
per year for devices left on continuously - reduce this in proportion
to usage.

On Jan 19, 11:31*am, wrote:
matthewb wrote:
There are many possible energy efficiency projects possible. Calculate
which one has the greatest return. I have created online calculators
to work this out. Make a priority list of easiest or cheapest changes
to implement. Start saving power, money and water.

Calculate your individual potential savings.
http://www.matthewb.id.au/media/Ligh...alculator.html

Good idea. Needs some work though, 3 issues cropped up...
First you've got the power equivalents wrong for cfl versus
filament. 3:1 for spotlights, 4:! for others. The equivalents on the
boxes arent compared to GLS lighting, and are deliberately
unrealistic.
2nd you've not taken account of downlighting versus other methods,
downers are an exceptionally inefficient way to distribute light.
3rd your calculator seems to assume that all lights are on and off for
the same number of hours per day, which is far from realistic.
4th I dont recall seeing tubular filament on there. Many of us still
have them here, and energy efficiency of those is much worse than GLS.

Has a lot of potential if these bugs are ironed out.

http://www.matthewb.id.au/media/Comp...alculator.html
http://www.matthewb.id.au/media/Elec...alculator.html
http://www.matthewb.id.au/media/Elec...alculator.html
http://www.matthewb.id.au/media/Hot_...alculator.html
http://www.matthewb.id.au/media/Sola...alculator.html

See if you have implemented all possible savings.
http://www.matthewb.id.au/media/Save...Checklist.html

More information also on the website
http://www.matthewb.id.au/

Best Wishes

Hi
Thank you for your feedback.
I have taken your thoughts in and altered the Light Energy Calculator.
There is now an extra entry about down lights and halogen strip-
lights.
There is also a Group Results section where you can import up to 10
calculations into this separate table. You can add our light
descriptions and there is Grand Totals.
http://www.matthewb.id.au/media/Ligh...alculator.html
What do you think?
Regards
Matthew

On Jan 19, 7:41*pm, pete wrote:
On Sun, 18 Jan 2009 15:53:02 -0800 (PST), matthewb wrote:
There are many possible energy efficiency projects possible. Calculate
which one has the greatest return. I have created online calculators
to work this out. Make a priority list of easiest or cheapest changes
to implement. Start saving power, money and water.

Calculate your individual potential savings.
http://www.matthewb.id.au/media/Ligh...alculator.html
http://www.matthewb.id.au/media/Comp...alculator.html
http://www.matthewb.id.au/media/Elec...alculator.html
http://www.matthewb.id.au/media/Elec...alculator.html
http://www.matthewb.id.au/media/Hot_...alculator.html
http://www.matthewb.id.au/media/Sola...alculator.html

See if you have implemented all possible savings.
http://www.matthewb.id.au/media/Save...Checklist.html

More information also on the website
http://www.matthewb.id.au/

Best Wishes

You've obviously put a lot of work into this, but I can't help feeling
you're focussing on the wrong things.
The government runs a website for checking the energy efficiency of your
house. They concentrate on the big issues: such as loft insulation,
cavity wall insulation, double glazing - rather than switching to CFLs
or turning your computer off.
Take a look atwww.energysavingtrust.org.uk/checkto get a breakdown of
the cost/benefits of various measures. You can also re-run the survey
with different parameters, to do a "what if" comparison.

p.s. for electrical appliances, a rough guide is a cost of £1 per Watt
per year for devices left on continuously - reduce this in proportion
to usage.

Hi
Thank you for your feedback. I have looked at the link and the site is
great. The information available is comprehensive. There is a bias
towards UK only audience (requires postcode). http://www.matthewb.id.au/
does cover heating, cooling, cars and hot water. I plan to add a
cooling calculator guide. The Energy Efficiency eBook covers 60
technologies including renewable energy, transport and the future.

matthewb wrote:
On Jan 19, 11:31�am, wrote:
matthewb wrote:
There are many possible energy efficiency projects possible. Calculate
which one has the greatest return. I have created online calculators
to work this out. Make a priority list of easiest or cheapest changes
to implement. Start saving power, money and water.

Calculate your individual potential savings.
http://www.matthewb.id.au/media/Ligh...alculator.html

Good idea. Needs some work though, 3 issues cropped up...
First you've got the power equivalents wrong for cfl versus
filament. 3:1 for spotlights, 4:! for others. The equivalents on the
boxes arent compared to GLS lighting, and are deliberately
unrealistic.
2nd you've not taken account of downlighting versus other methods,
downers are an exceptionally inefficient way to distribute light.
3rd your calculator seems to assume that all lights are on and off for
the same number of hours per day, which is far from realistic.
4th I dont recall seeing tubular filament on there. Many of us still
have them here, and energy efficiency of those is much worse than GLS.

Has a lot of potential if these bugs are ironed out.

http://www.matthewb.id.au/media/Comp...alculator.html
http://www.matthewb.id.au/media/Elec...alculator.html
http://www.matthewb.id.au/media/Elec...alculator.html
http://www.matthewb.id.au/media/Hot_...alculator.html
http://www.matthewb.id.au/media/Sola...alculator.html

See if you have implemented all possible savings.
http://www.matthewb.id.au/media/Save...Checklist.html

More information also on the website
http://www.matthewb.id.au/

Best Wishes

Hi
Thank you for your feedback.
I have taken your thoughts in and altered the Light Energy Calculator.
There is now an extra entry about down lights and halogen strip-
lights.
There is also a Group Results section where you can import up to 10
calculations into this separate table. You can add our light
descriptions and there is Grand Totals.
http://www.matthewb.id.au/media/Ligh...alculator.html
What do you think?
Regards
Matthew


I've just used the page to calc the potential savings in some
lighting, and its very handy. Its a neat tool. But... a few issues
still remain.

First most of the power equivalent figs are wrong. FYI the equivalents
on the boxes are compared to softone filament lamps, which are not the
GLS lamps most of us use. These equivalents arent realistic if
comparing to GLS filament.

2nd no mention yet of filament striplights, which are exceptionally
inefficient. Eg a 30w 221mm filament strip gives 190 lumens, and they
cost £1-£3 a time. Replacing these gives rather diferent figures to
replacing GLS lamps.

Also dont forget IR reflecting halogens, which give improved figures,
eg 225w replaces 300w.

Also simply reducing halogen wattage on the high power lamps is often
a good move. 500w are often fitted where 150w would be more
appropriate.

6w LEDs dont give the light output of 50w halogens.

The calculator is great, but the user needs realistic data to put into
it rather than sales hype.

Thanks for doing the work.


NT

On Jan 20, 11:58*pm, matthewb wrote:
On Jan 19, 7:41*pm, pete wrote:



On Sun, 18 Jan 2009 15:53:02 -0800 (PST), matthewb wrote:
There are many possible energy efficiency projects possible. Calculate
which one has the greatest return. I have created online calculators
to work this out. Make a priority list of easiest or cheapest changes
to implement. Start saving power, money and water.

Calculate your individual potential savings.
http://www.matthewb.id.au/media/Ligh...alculator.html
http://www.matthewb.id.au/media/Comp...alculator.html
http://www.matthewb.id.au/media/Elec...alculator.html
http://www.matthewb.id.au/media/Elec...alculator.html
http://www.matthewb.id.au/media/Hot_...alculator.html
http://www.matthewb.id.au/media/Sola...alculator.html

See if you have implemented all possible savings.
http://www.matthewb.id.au/media/Save...Checklist.html

More information also on the website
http://www.matthewb.id.au/

Best Wishes

You've obviously put a lot of work into this, but I can't help feeling
you're focussing on the wrong things.
The government runs a website for checking the energy efficiency of your
house. They concentrate on the big issues: such as loft insulation,
cavity wall insulation, double glazing - rather than switching to CFLs
or turning your computer off.
Take a look atwww.energysavingtrust.org.uk/checktoget a breakdown of
the cost/benefits of various measures. You can also re-run the survey
with different parameters, to do a "what if" comparison.

p.s. for electrical appliances, a rough guide is a cost of £1 per Watt
per year for devices left on continuously - reduce this in proportion
to usage.

Hi
Thank you for your feedback. I have looked at the link and the site is
great. The information available is comprehensive. There is a bias
towards UK only audience

Is that any surprise, given where you are posting?

MBQ

On 21 Jan, 10:05, wrote:
matthewb wrote:
On Jan 19, 11:31 am, wrote:
matthewb wrote:
There are many possible energy efficiency projects possible. Calculate
which one has the greatest return. I have created online calculators
to work this out. Make a priority list of easiest or cheapest changes
to implement. Start saving power, money and water.

Calculate your individual potential savings.
http://www.matthewb.id.au/media/Ligh...alculator.html

Good idea. Needs some work though, 3 issues cropped up...
First you've got the power equivalents wrong for cfl versus
filament. 3:1 for spotlights, 4:! for others. The equivalents on the
boxes arent compared to GLS lighting, and are deliberately
unrealistic.
2nd you've not taken account of downlighting versus other methods,
downers are an exceptionally inefficient way to distribute light.
3rd your calculator seems to assume that all lights are on and off for
the same number of hours per day, which is far from realistic.
4th I dont recall seeing tubular filament on there. Many of us still
have them here, and energy efficiency of those is much worse than GLS..

Has a lot of potential if these bugs are ironed out.

http://www.matthewb.id.au/media/Comp...alculator.html
http://www.matthewb.id.au/media/Elec...alculator.html
http://www.matthewb.id.au/media/Elec...alculator.html
http://www.matthewb.id.au/media/Hot_...alculator.html
http://www.matthewb.id.au/media/Sola...alculator.html

See if you have implemented all possible savings.
http://www.matthewb.id.au/media/Save...Checklist.html

More information also on the website
http://www.matthewb.id.au/

Best Wishes

Hi
Thank you for your feedback.
I have taken your thoughts in and altered the Light Energy Calculator.
There is now an extra entry about down lights and halogen strip-
lights.
There is also a Group Results section where you can import up to 10
calculations into this separate table. You can add our light
descriptions and there is Grand Totals.
http://www.matthewb.id.au/media/Ligh...alculator.html
What do you think?
Regards
Matthew

I've just used the page to calc the potential savings in some
lighting, and its very handy. Its a neat tool. But... a few issues
still remain.

First most of the power equivalent figs are wrong. FYI the equivalents
on the boxes are compared to softone filament lamps, which are not the
GLS lamps most of us use. These equivalents arent realistic if
comparing to GLS filament.

2nd no mention yet of filament striplights, which are exceptionally
inefficient. Eg a 30w 221mm filament strip gives 190 lumens, and they
cost £1-£3 a time. Replacing these gives rather diferent figures to
replacing GLS lamps.

Also dont forget IR reflecting halogens, which give improved figures,
eg 225w replaces 300w.

Also simply reducing halogen wattage on the high power lamps is often
a good move. 500w are often fitted where 150w would be more
appropriate.

6w LEDs dont give the light output of 50w halogens.

The calculator is great, but the user needs realistic data to put into
it rather than sales hype.

Thanks for doing the work.

NT

Hi
Thank you for your detailed feedback. I have altered the
http://www.matthewb.id.au/media/Ligh...alculator.html to
include a list of possible lights to choose from to give more choice
when using the calculator. There will always be more possible lights
for a list like this. Some of the conversion values have changed.

Some reference links for lighting efficiency is as follows.
LED efficiency
http://www.cree.com/products/pdf/XLa...ng%20Class.pdf

GLS ver CFL conversion
http://www.environment.gov.au/settle.../lighting.html

Regards
Matthew

matthewb wrote:

Hi
Thank you for your detailed feedback. I have altered the
http://www.matthewb.id.au/media/Ligh...alculator.html to
include a list of possible lights to choose from to give more choice
when using the calculator. There will always be more possible lights
for a list like this. Some of the conversion values have changed.

Some reference links for lighting efficiency is as follows.
LED efficiency
http://www.cree.com/products/pdf/XLa...ng%20Class.pdf

from the manufacturer A manufacturer of replacement products with
some real issues, that wants people to buy them, and is thus
financially motivated, like any business producing products that dont
compare well, to convince people theyre better than they are by
whatever perfectly legal means they can.


GLS ver CFL conversion
http://www.environment.gov.au/settle.../lighting.html

from a non-expert source more interested in pretending it can solve
our problems, ie a political source!

Why dont you go read Don Klipstein on the subject, hes a genuine
expert. Your calc idea is a goodun, but its only going to be useful if
you get your power equivalents right, and dont represent that LEDs are
comparable replacements for halogens. There are various ways to
massage or re-present the figures, and various reasons that its done.
Dont overlook the fade factor.


NT