Have you measure it reach 16c?

Most likely because your National have higher BTU, allow faster cooling. Just like york. And this National is reliable, my inlaw house have a 1.5hp national still running strong.

Don't know about Mitsu or other brand, I know Panasonic also have real clock timer.

Sharp Ionizer? Lazy to go check my sharp remote. But non Ionizer sharp don't have.

I thought is 10 ft? and all expose. Conceal extra lots of extra charges.

Not 4tf lah, my previous house more than 4 ft, did not charge. Nearly 10ft.

I don't know now. Last year in expo they also say free installation upto 10 ft. Maybe can go other place to check.

500hp you need 11kv power

I try not to use any korean A/C, few of my friends (not the latest model) using korean brand having problem like noise, and frequent breakdown.

Not enough. Minimal 1.5, best will be 2hp.

Also depend what is your temperature setting. To me is better oversize than undersize. Size like mine using 1HP is over work. Just like a heavy car with 2L engine drink more fuel than a 3L same car, and the power is there when you need it.

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Added on April 2, 2012, 10:52 pm2 and 1.5hp piping is the same. And some installer told me even better to use 2.5 piping because if not enough power can still upgrade without doing piping. In a hot day, 2hp will cool the room faster, and than switch to lower the compressor. 1.5hp may take slightly longer to cool the room to desire temperature.

This post has been edited by weikee: Apr 2 2012, 10:52 PM

Heat transfer is not on the copper piping. Is on the Compressor, when you install larger piping, the a/c installer just need to top the gas to ensure pressure is there.

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Added on April 3, 2012, 9:30 amYour link do not take account of outside temperature. To actually calculate correct size you need to know the average temperature of the weather during the operation time.

Try use this

http://www.calculator.net/btu-calculator.html

http://papamy.panasonic.com.my/papamy/horse.html


And from York Malaysia <http://www.york.com.my/main.asp?tpage=faq>


It is not easy to estimate the actual heat load of a room without going through some tedious calculation. You are advised to consult air conditioner contractors before you decide on the equipment. Bring along the plan and measurement of your room and be specific what is the function of the room, is it a bedroom or a living room?

There is however, a rule of thumb that could give you a rough estimation of the required cooling capacity. This can be achieved by doing a simple calculation.

First, multiply the volume of your room in cubic feet with a factor of 6. Determine the number of person using the room and multiply with 500Btu/hr, as each person produces 500Btu/hr of heat for normal activity. Add these two together, and you get the estimated cooling capacity.

The calculation just now is for bedroom only. For other applications, the factor has to be changed. This rule of thumb calculation is just for estimation purposes. It is advised to reconfirm with your air conditioner contractors again before you place your order.

This post has been edited by weikee: Apr 3 2012, 09:30 AM

I know what you mean. The difference between 1.5hp and 2.5hp piping is not significant to have this problem. Anyway, this also recommend by my friend who run a chiller service and installer company.

We are here to exchange ideas, and get feedback

Knowledge is to share. Not to keep.

I think better get common spec, like 2hp. Can ask them use 2.5HP piping, because 2.5HP piping can be use for 2hp too. After I install 2hp piping in my living room, my friend told me can use 2.5hp piping, in future if 2hp not enough cooling can change to 2.5hp

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Added on April 3, 2012, 3:16 pmIt say up to 50%, notice the key word "up to", and is usually under control environment. No doubt for long operation hours of a/c inverter do save some. Exact really don't know.

This post has been edited by weikee: Apr 3 2012, 03:22 PM

Thanks for the info, i do recall something about 5/8" my friend told me. If not mistaken many will use 1/4" & 5/8" for 2hp and above.

Air tight

Want real cooling, but don't mind the noise. Get York or Acson.

Like Sharp, only have running timer. Not clock timer. Clock timer you can set what time it switch on, and what time it switch off.

In some country, they stop using R22 for new equipment, but use difference direct replacement gas for same identical machine, even same copper. Think in global market there are few direct replaceable gas for R22 without modifying the HVAC.

My friend been bring some of difference direct replacement gas via Singapore for testing. All he can say, is hell hard to bring in gas to Malaysia, lots of restriction and special permit... you know what. The loosing end is the customer.

He tested some, and seem to have good feedback. But all he can do is just small quantity for testing.

R410A in technical analysis is not very efficient at higher temperature.