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Aircon Bills - Inverter Vs Non-inverter


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#1 ilys

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Posted 23 July 2007 - 09:33 AM

Does inverter aircon help to reduce ele. bills as compared to non-inverter aircon?
I have heard that only by using all units concurrently, then there will be savings.
Else, if the usage is just confined to a room.
The savings is not visible as with a non-inverter.

Anyone with exp, pls advise as i m contemplating whether to get inverter or non-inverter.
Thanks

    

#2 deathcoth

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Posted 23 July 2007 - 10:23 AM

Does inverter aircon help to reduce ele. bills as compared to non-inverter aircon?
I have heard that only by using all units concurrently, then there will be savings.
Else, if the usage is just confined to a room.
The savings is not visible as with a non-inverter.

Anyone with exp, pls advise as i m contemplating whether to get inverter or non-inverter.
Thanks



Inverter system is MORE expensive than non-inverter types. estimate 1.5 times

Consumsion is less for Inverter system. maybe 30-40% savings on electricity

bottom line - how much u using each day?
similar if u using cash to buy or credit cards to charge & then pay interest :D

#3 applefreak

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Posted 23 July 2007 - 10:41 AM

Does inverter aircon help to reduce ele. bills as compared to non-inverter aircon?
I have heard that only by using all units concurrently, then there will be savings.
Else, if the usage is just confined to a room.
The savings is not visible as with a non-inverter.

Anyone with exp, pls advise as i m contemplating whether to get inverter or non-inverter.
Thanks

thought it's the other way round?
if always on all together, non-inverter is good enough
but if only on one or two fancoil, inverter is better
coz if on one fancoil only for non-inverter, the power consumption is still 100% coz the CU is running regardless of how many fancoils are switched on...

#4 MaCe

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Posted 23 July 2007 - 10:57 AM

for inverters, you can only see the savings if you use a lot.

#5 redbottle

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Posted 24 July 2007 - 06:00 PM

thought it's the other way round?
if always on all together, non-inverter is good enough
but if only on one or two fancoil, inverter is better
coz if on one fancoil only for non-inverter, the power consumption is still 100% coz the CU is running regardless of how many fancoils are switched on...


If switching on all units together, it is better to get inverter because inverter can run on partial load, consuming a fraction of the electricity that a non-inverter consumes... non-inverter is either running on full load or not running at all, hence power is cut in and cut out intermittently... over an entire night (8-10 hrs) , the cost of running partial load should be cheaper than cost of intermittently running on full load...

#6 Warrior88

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Posted 24 July 2007 - 06:11 PM

if always on all together, non-inverter is good enough



If switching on all units together, it is better to get inverter because inverter can run on partial load,


So, who is correct, any more expert advice ?

#7 applefreak

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Posted 24 July 2007 - 08:36 PM

If switching on all units together, it is better to get inverter because inverter can run on partial load, consuming a fraction of the electricity that a non-inverter consumes... non-inverter is either running on full load or not running at all, hence power is cut in and cut out intermittently... over an entire night (8-10 hrs) , the cost of running partial load should be cheaper than cost of intermittently running on full load...

that's why if on all together non-inverter is good enough mah
coz both will be running on full load
but if only on one or two, then non-inverter still run full load but inverter will run partial load
that's why the savings? :yamseng:

#8 genesis

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Posted 25 July 2007 - 12:05 AM

Does inverter aircon help to reduce ele. bills as compared to non-inverter aircon?
I have heard that only by using all units concurrently, then there will be savings.
Else, if the usage is just confined to a room.
The savings is not visible as with a non-inverter.

Anyone with exp, pls advise as i m contemplating whether to get inverter or non-inverter.
Thanks

My experience with non-inverter had definitely cost more even low consumption. Whichever type's , your bill would be around at least $50 more if you use air con. I've a invert system having it run almost 9hr (13 BTU)in average and the elect bill come to about $60 comparing with non-invert type where it cost about $20 more.

#9 redbottle

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Posted 25 July 2007 - 09:16 AM

that's why if on all together non-inverter is good enough mah
coz both will be running on full load
but if only on one or two, then non-inverter still run full load but inverter will run partial load
that's why the savings? :)



even if on all together, inverter will still run on partial load once the pre-set temperature is reached... i.e. inverter will run on full load only for the first hour or so to cool the room to the pre-set temperature, and after that it will run on partial load to maintain the temperature...

non-inverter works quite differently.. it runs full load for the first hour or so to cool the room to the pre-set temperature , then it will shut down and let the room temperature rise to abt 2 deg celcius above the pre-set temperature, and then it re-start and runs full load until the pre-set temperature is reached, then shut down again... the cycle continues... so, non-inverter switches between full load and shut-down...

generally, over an entire night (8-10 hrs), an inverter will consume less electricity than a non-inverter, regardless of how many indoor units are switched on...

the critical question is whether the electricity cost savings in using an inverter is sufficient to offset the higher price of the inverter... if u use aircon almost everyday, an inverter is worthwhile because u can save a lot on electricity bill, but if u use only once or twice a week, then u save only a little on electricity bill, and so an inverter is not worthwhile...

for example, an inverter costs $1000 more than a non-inverter... u use the aircon everynight, so u can save $20 every month on electricity by using the inverter, u can recoup the $1000 over a period of $1000/$20 = 50 months = 4 yrs 2 months... an aircon can typically last u about 5 to 7 years, so, it is worthwhile to buy the inverter...


however, if u hardly use the aircon, u save only $5 every month by using an inverter, then it will take $1000/$5 = 200 months = 16 years 8 months... u can't recoup the money within the life span of the inverter aircon, so it is not worthwhile to buy inverter... it is cheaper to buy non-inverter...

Edited by redbottle, 25 July 2007 - 09:37 AM.


#10 alice916

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Posted 25 July 2007 - 03:39 PM

My experience with non-inverter had definitely cost more even low consumption. Whichever type's , your bill would be around at least $50 more if you use air con. I've a invert system having it run almost 9hr (13 BTU)in average and the elect bill come to about $60 comparing with non-invert type where it cost about $20 more.


hi, mind to tell us that which brand of no-inverte that u using?
As i know that got some non-inverter aircon r also under save energy list, such like Fujitsu and mitshubisi easy clean.

#11 hongss

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Posted 27 July 2007 - 12:08 AM

hi, mind to tell us that which brand of no-inverte that u using?
As i know that got some non-inverter aircon r also under save energy list, such like Fujitsu and mitshubisi easy clean.


you can check out the Mitsubishi non inverter Sys 3 - MUX-20TV/MS-A10VD x 3. One of the most energy savings for non inverters..im planning to get this also

#12 alice916

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Posted 27 July 2007 - 04:39 PM

you can check out the Mitsubishi non inverter Sys 3 - MUX-20TV/MS-A10VD x 3. One of the most energy savings for non inverters..im planning to get this also


hi, any idea how much its it?

#13 genesis

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Posted 28 July 2007 - 12:10 AM

hi, mind to tell us that which brand of no-inverte that u using?
As i know that got some non-inverter aircon r also under save energy list, such like Fujitsu and mitshubisi easy clean.

European's brand , single unit. Nowaday newer model non-inverter for low usage are still ok. Again, if you're planning to use it every nite then inverter system would be recommended.

hi, any idea how much its it?

Should be less then 2K or around 1900 or lower, inc installation.

#14 hongss

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Posted 29 July 2007 - 02:31 PM

hi, any idea how much its it?


cost abt 2200 including of installation

#15 applefreak

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Posted 29 July 2007 - 02:40 PM

mit starmex non-inverter including installation should cost not more than $2k
think one of the forummers here got it at $1.7k all in :no:

#16 tingshen

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Posted 29 July 2007 - 09:11 PM

inverter is so much environmental friendly, but the government is not friendly enough to push for it.

they shall either add tax on non-inverter aircon or give incentives for people to buy inverter.....or the best is, give incentives for people who dun use aircon at all!:bangwall: :dunno: come out heavy tax for people who is using aircon hehe....

#17 yoongf

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Posted 29 July 2007 - 09:24 PM

.....or the best is, give incentives for people who dun use aircon at all!:bangwall:


Wah.. u dare to say this...

in LKY's big red book.. he did mention that one of the attributes for the success of Sg is aircon.

To me.. aircon is one of the pillars of Sg society.

#18 tingshen

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Posted 29 July 2007 - 11:14 PM

yup, and he's going to tell you that, he regretted saying that :dancingqueen:

all the stupid aircon lah, causing all these global warming thingy....

#19 genesis

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Posted 02 August 2007 - 12:29 AM

yup, and he's going to tell you that, he regretted saying that :P

all the stupid aircon lah, causing all these global warming thingy....

ai ya, global warming mainly cause by number of forest being reduced, so if a country want to advanced or develop then it's not easy to achive, it maybe the Earth orbit nearer to to Sun. Frankly , if you ask any people to take a non air-con bus, they'll aviod! Once you're in a comfort zone , you'll avoid changing.

#20 leen

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Posted 10 September 2007 - 08:13 AM

the following are a lists of air-con retailers that you can try calling them and faxing them your floor plan for sizing caln and quotation. you can also ask them for advice on what is the best combination.

1) national climate change committee
this is website for your infor on air-con
http://www.nccc.gov..../checklist.shtm

2) toshiba
http://www.toshiba.c...dc503f2ef404802

3) LG
a) http://www.nccc.gov....ylabel/lge.shtm
b) http://sg.lge.com/su...orth.jsp#aircon

3) mitsubishi heavy industries
http://www.nccc.gov....industries.shtm

4) sharp
http://www.nccc.gov....abel/sharp.shtm

5) fujitsu
http://www.nccc.gov....el/fujitsu.shtm

6) general
http://www.nccc.gov....el/general.shtm

7) mcquay
http://www.nccc.gov....bel/mcquay.shtm

8) panasonic
a) http://www.nccc.gov..../panasonic.shtm
b) http://panasonic.com....asp?ContId=112

9) hitachi
http://www.nccc.gov....el/hitachi.shtm

10) daikin
http://www.nccc.gov....bel/daikin.shtm

11) mitsubishi electric
http://www.nccc.gov....hielectric.shtm

12) samsung
http://www.nccc.gov....el/samsung.shtm

air-con retailers cum installers

1) coolserve
http://www.coolserve...visor.asp?id=10

2) best tech
http://www.besttechaircon.com/

3) Etronin Air-Conditioners & Electric
Blk 633 Veerasamy Road #01-128 Singapore 200633 Tel: 62948931

4) hong tar
http://www.hongtar.com.sg/

air-con certified installers:
www.bca.gov.sg/academy/Trained_Installers.aspx

hope the above infor helps.




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