Feb 3 2014, 10:03 PM
QUOTE(oe_kintaro @ Feb 3 2014, 05:47 PM)
Having a lot of money doesn't mean he knows everything. Do you even know how cold actually 25oC is? There is a range of combination of temperature, humidity and air movement which is known as the thermal comfort zone, in which human perceive themselves to be comfortable. 25oC is usually the upper limit. In HVAC design, that approximates the max temperature you can go in Summer before it is deemed uncomfortable. On the other hand, 20oC is the minimum temperature you set for heating in Winter before things are deemed too cold for comfort.
To be fair I absolutely agree with your earlier contention that passive cooling and better structural design reduces the need for active regulation via air conditioning. However I cannot abide by the fact that you dismiss setting 25oC as a good practice. It *is* the norm (it should be even higher if we really want to save on carbon emissions). To use another car analogy, you don't floor the pedal if you are just intending to drive at 80kmh
The whole point of all the technological advances in HVAC and environmental design such as inverters etc is that you would want to adjust your living environment so it is comfortable with the minimum drain on resources.
It's not just about the money here.
It's just absolutely wrong to even justify setting 18 or 19 or even 20oC in our Malaysian climate as it is extremely difficult to achieve. To be honest with you I think the majority of Malaysians are ignorant about how air-conditioning is supposed work. An expat friend of mind once remarked how silly and ironic it was to see Malaysians set 18-19oC in their office thermostat and yet come to work clad in sweaters and jackets, complaining it was "too cold".
FYI until recently I lived in a 3 storey house with 8 air-conditioners, (including 2 energy-sucking 2.5 and 2HP cassette units) and my monthly bill was rarely above RM170. That was because I minimized usage of the air-conditioning to just a few hours at night, not seeing the need to blast it on 24x7 and tried my best to use electricity saving devices like inverter fridges, LED lighting etc. It's no point bragging about electricity costing RM700-800 and being able to afford paying for it. It think it's downright shameful nothing more is done to lower it.
just my 2 cents'
To be fair I absolutely agree with your earlier contention that passive cooling and better structural design reduces the need for active regulation via air conditioning. However I cannot abide by the fact that you dismiss setting 25oC as a good practice. It *is* the norm (it should be even higher if we really want to save on carbon emissions). To use another car analogy, you don't floor the pedal if you are just intending to drive at 80kmh
The whole point of all the technological advances in HVAC and environmental design such as inverters etc is that you would want to adjust your living environment so it is comfortable with the minimum drain on resources.
It's not just about the money here.
It's just absolutely wrong to even justify setting 18 or 19 or even 20oC in our Malaysian climate as it is extremely difficult to achieve. To be honest with you I think the majority of Malaysians are ignorant about how air-conditioning is supposed work. An expat friend of mind once remarked how silly and ironic it was to see Malaysians set 18-19oC in their office thermostat and yet come to work clad in sweaters and jackets, complaining it was "too cold".
FYI until recently I lived in a 3 storey house with 8 air-conditioners, (including 2 energy-sucking 2.5 and 2HP cassette units) and my monthly bill was rarely above RM170. That was because I minimized usage of the air-conditioning to just a few hours at night, not seeing the need to blast it on 24x7 and tried my best to use electricity saving devices like inverter fridges, LED lighting etc. It's no point bragging about electricity costing RM700-800 and being able to afford paying for it. It think it's downright shameful nothing more is done to lower it.
just my 2 cents'
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