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Tenancy Agreement: Limit on aircon usage

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Sergei82
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Postby Sergei82 » Fri, 22 Feb 2013 1:24 pm

x9200 wrote:We use the AC for our kid, @27, small room, 8-12h a day/night. This adds up probably ~S$100 to the bill but 22 is kind of extreme (S$200-300 depending on the room size?).
Slightly off topic, iamsen, If you are saying you sleep at 22 practically naked and not covered with anything and you are a local guy brought up in this climate, maybe you should visit a doctor? Thyroid problems or something?

22 is reasonably fine to feel comfortable undressed (unless aircon is blowing straight at you all night long), cosmonauts have 18 up there. :)

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Postby iamsen » Fri, 22 Feb 2013 4:50 pm

Brah wrote:Do you contribute towards the electric bills?


Of course.

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Postby iamsen » Fri, 22 Feb 2013 4:51 pm

x9200 wrote: Thyroid problems or something?



Yes.
Inheritted from maternal grandmother. Skipped a generation.

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Postby Brah » Fri, 22 Feb 2013 9:17 pm

iamsen wrote:
Brah wrote:Do you contribute towards the electric bills?


Of course.

Well then you should be able to work something out, it's easy.

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Postby JR8 » Sat, 23 Feb 2013 12:28 am

We never used air-con in our condo.

Just kept the windows ajar in each room, and had a big floor-standing fan in the bedroom.

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Postby earthfriendly » Sat, 23 Feb 2013 1:34 am

What about turning on both the fan and the ac (on high setting) simultaneously? It uses less electricity than relying on the ac alone?

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Postby zzm9980 » Sat, 23 Feb 2013 6:38 pm

earthfriendly wrote:What about turning on both the fan and the ac (on high setting) simultaneously? It uses less electricity than relying on the ac alone?


And how does that work? Quite funny advice given your forum name.

The two devices together will use more electricity than one alone. That's physics, no way around it. A fan circulates air in the room, it does not change the temperature or humidity of the air. You may FEEL cooler with the fan on, but the temperature is not lower, and you're not somehow using less electricity.

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Postby x9200 » Sat, 23 Feb 2013 7:31 pm

The temperature sensor is in the wall unit and obviously it is not at the unit blowing outlet. This means that the temperature input the unit gets is from the air outside of the blowing stream. Unless the configuration of the room is such that the aircon blows kind of back to itself (probably very rare case) it reads always a bit warmer temperature because it is on the top and cool air goes down. If you mix the air it will lower down the temperature also in the upper part so the thermostat will switch cooling off earlier. And of course cooling is much more expensive than mixing the air.

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Postby x9200 » Sat, 23 Feb 2013 7:35 pm

Besides, it is also true that you feel the temperature much lower with the blowing fan so t is good idea to combine it also for that reason.

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Postby earthfriendly » Sun, 24 Feb 2013 1:01 pm

"A central air conditioner uses about 10 times as much electricity as a window or rotary fan does."

http://www.ehow.com/info_7762490_energy ... z2Lmza3gac

A friend saved on her energy bill by combining fan with AC, as she can run the AC on higher setting, rather than rely solely on AC. She lived in a dry climate.


http://www.ehow.com/info_7762490_energy ... oners.html

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Postby x9200 » Sun, 24 Feb 2013 3:34 pm

earthfriendly, you may reconsider your discussion strategy as you posted the links proving zzm point :) Fortunately I don't think it is the whole true.

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Postby zzm9980 » Sun, 24 Feb 2013 11:31 pm

Two devices turned on at the same time will never use less electricity than just one of the two devices turned on, assuming same settings. Simple laws of physics. Yes, turning on the fan may help circulate the cold air and make you feel cooler, but that's not what Earthfriendly said.

x92, After your recent dissertation about 802.11 wifi you're the last person who can argue with me for being pedantic :P

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Postby earthfriendly » Mon, 25 Feb 2013 1:45 am

The link is for central air conditioning. Can't find the electricity usage for the stand alone AC unit. Just another option to experiment with if you are looking to cut down on your electricity bill.

The cost saving results from leaving AC on a much higher setting than you normally would and the fan kick in to help circulate the cool air around the room. Given that AC uses much higher electricity than a fan, isn't it worth a try? Anyway, it was thru word of mouth from somebody who had success with it. Results will vary between each home.

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Postby JR8 » Mon, 25 Feb 2013 6:56 am

What on earth does this mean?

Earth friendly from the the window of my Bentley ah?

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Postby x9200 » Mon, 25 Feb 2013 7:18 am

zzm9980 wrote:Two devices turned on at the same time will never use less electricity than just one of the two devices turned on, assuming same settings. Simple laws of physics.

You have defacto 3 devices: AC (1st fan + 2nd "fridge"); and a stand alone fan (3rd). While the fans 1 and 3 work continuously any compressor based fridge (so the one from AC too) works on on and off bases. If the sensor indicates the temperature is right it shuts down the fridge. I am simplifying of course.


Yes, turning on the fan may help circulate the cold air and make you feel cooler, but that's not what Earthfriendly said.

She said: What about turning on both the fan and the ac (on high setting) simultaneously? It uses less electricity than relying on the ac alone?Typically people do not distinguish functional devices inside the AC :)

x92, After your recent dissertation about 802.11 wifi you're the last person who can argue with me for being pedantic :P

:tongue:


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