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Post by Deleted on Nov 24, 2017 15:24:06 GMT 7
Ws chatting with an air con contractor today about how to calculate what size air con for a house.
The calculation is as follows. ..
Square metres of rooms times by 140.
So for example. ...
Your room is 6metres by 6 metres...
36 times by 140 equals 5040.
You'll need a 5 kilowatt system for that room.
I was looking at a 14kw ducted system on ebay. The new house is 4 beds , 2 loungerooms. Is a 14kw system enough?
He said remember you won't be cooling the bedrooms while you're in the loungeroom.
The weather in this part of Australia is easily on par with Thailand, so I'd be confident the maths will transfer easily.
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Post by Soutpeel on Nov 24, 2017 16:57:52 GMT 7
Ws chatting with an air con contractor today about how to calculate what size air con for a house. The calculation is as follows. .. Square metres of rooms times by 140. So for example. ... Your room is 6metres by 6 metres... 36 times by 140 equals 5040. You'll need a 5 kilowatt system for that room. I was looking at a 14kw ducted system on ebay. The new house is 4 beds , 2 loungerooms. Is a 14kw system enough? He said remember you won't be cooling the bedrooms while you're in the loungeroom. The weather in this part of Australia is easily on par with Thailand, so I'd be confident the maths will transfer easily. Simple chart based on square foot and BTU Area To Be Cooled (square feet) Capacity Needed (BTUs per hour) Square foot BTU 350 up to 400 9,000 400 up to 450 10,000 450 up to 550 12,000 550 up to 700 14,000 700 up to 1,000 18,000 1,000 up to 1,200 21,000 1,200 up to 1,400 23,000 1,400 up to 1,500 24,000 1,500 up to 2,000 30,000 |
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oldie
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Post by oldie on Nov 24, 2017 17:14:10 GMT 7
Refrigeration sizing is a science in itself. A 6 by 6 room on the Northern side of the house with large windows (in Oz) will require a bigger system than the same size room on the Southern side.
Having said that, 5kW would be about right. Maybe slightly larger where we are in Qld.
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Post by Deleted on Nov 24, 2017 17:44:16 GMT 7
Ws chatting with an air con contractor today about how to calculate what size air con for a house. The calculation is as follows. .. Square metres of rooms times by 140. So for example. ... Your room is 6metres by 6 metres... 36 times by 140 equals 5040. You'll need a 5 kilowatt system for that room. I was looking at a 14kw ducted system on ebay. The new house is 4 beds , 2 loungerooms. Is a 14kw system enough? He said remember you won't be cooling the bedrooms while you're in the loungeroom. The weather in this part of Australia is easily on par with Thailand, so I'd be confident the maths will transfer easily. Simple chart based on square foot and BTU Area To Be Cooled (square feet) Capacity Needed (BTUs per hour) Square foot BTU 350 up to 400 9,000 400 up to 450 10,000 450 up to 550 12,000 550 up to 700 14,000 700 up to 1,000 18,000 1,000 up to 1,200 21,000 1,200 up to 1,400 23,000 1,400 up to 1,500 24,000 1,500 up to 2,000 30,000 Btu are for girlie man air cons. We don't use feet anymore except in America or talking about our feet. A real system uses kilowatts. 9000 BTU 2.6kw 12000 BTU 3.5kw 15000 BTU 4.3kw 17000 BTU 4.98kw 18000 BTU 5.2kw 19000 BTU 5.5kw 24000 BTU 7.0kw 27000 BTU 7.9kw 32000 BTU 9.3kw 36000 BTU 10.5kw |
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Post by Deleted on Nov 24, 2017 17:45:41 GMT 7
Refrigeration sizing is a science in itself. A 6 by 6 room on the Northern side of the house with large windows (in Oz) will require a bigger system than the same size room on the Southern side. Having said that, 5kW would be about right. Maybe slightly larger where we are in Qld. Refrigerated system would probably cause mould in qld. I'd say its hotter where we are than there. |
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Post by Soutpeel on Nov 24, 2017 17:48:07 GMT 7
Simple chart based on square foot and BTU Area To Be Cooled (square feet) Capacity Needed (BTUs per hour) Square foot BTU 350 up to 400 9,000 400 up to 450 10,000 450 up to 550 12,000 550 up to 700 14,000 700 up to 1,000 18,000 1,000 up to 1,200 21,000 1,200 up to 1,400 23,000 1,400 up to 1,500 24,000 1,500 up to 2,000 30,000 Btu are for girlie man air cons. We don't use feet anymore except in America or talking about our feet. A real system uses kilowatts. 9000 BTU 2.6kw 12000 BTU 3.5kw 15000 BTU 4.3kw 17000 BTU 4.98kw 18000 BTU 5.2kw 19000 BTU 5.5kw 24000 BTU 7.0kw 27000 BTU 7.9kw 32000 BTU 9.3kw 36000 BTU 10.5kw In Thailand aircons are sized and sold in BTU...  |
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oldie
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Post by oldie on Nov 24, 2017 17:58:14 GMT 7
Refrigeration sizing is a science in itself. A 6 by 6 room on the Northern side of the house with large windows (in Oz) will require a bigger system than the same size room on the Southern side. Having said that, 5kW would be about right. Maybe slightly larger where we are in Qld. Refrigerated system would probably cause mould in qld. I'd say its hotter where we are than there. Aircons dehumidify. Is this for your house in Thailand or in Aust? Edit. I now assume your house in Thailand. Maybe not hotter where you are but definitely more humid. Humidity knocks air cons around, especially the outdoor/ condenser unit. It still depends on a lot of variables. |
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Post by Deleted on Nov 24, 2017 18:18:03 GMT 7
Refrigerated system would probably cause mould in qld. I'd say its hotter where we are than there. Aircons dehumidify. Is this for your house in Thailand or in Aust? Edit. I now assume your house in Thailand. Maybe not hotter where you are but definitely more humid. Humidity knocks air cons around, especially the outdoor/ condenser unit. It still depends on a lot of variables. Another house in Australia, not Adelaide , and not Thailand. |
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Post by Deleted on Nov 24, 2017 18:20:11 GMT 7
Btu are for girlie man air cons. We don't use feet anymore except in America or talking about our feet. A real system uses kilowatts. 9000 BTU 2.6kw 12000 BTU 3.5kw 15000 BTU 4.3kw 17000 BTU 4.98kw 18000 BTU 5.2kw 19000 BTU 5.5kw 24000 BTU 7.0kw 27000 BTU 7.9kw 32000 BTU 9.3kw 36000 BTU 10.5kw In Thailand aircons are sized and sold in BTU... Its akin to light globes being sold in candle power  |
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Post by Deleted on Nov 24, 2017 18:21:55 GMT 7
From wiki....
The British thermal unit (Btu or BTU) is a traditional unit of heat; it is defined as the amount of heat required to raise the temperature of one pound of water by one degree Fahrenheit.
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oldie
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Post by oldie on Nov 24, 2017 18:29:33 GMT 7
Aircons dehumidify. Is this for your house in Thailand or in Aust? Edit. I now assume your house in Thailand. Maybe not hotter where you are but definitely more humid. Humidity knocks air cons around, especially the outdoor/ condenser unit. It still depends on a lot of variables. Another house in Australia, not Adelaide , and not Thailand. That's a relief. I would be avoiding ducted air con in Thailand like the plague. But that is another story. |
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Post by rgs2001uk on Nov 24, 2017 21:07:02 GMT 7
Refrigeration sizing is a science in itself. A 6 by 6 room on the Northern side of the house with large windows (in Oz) will require a bigger system than the same size room on the Southern side. Having said that, 5kW would be about right. Maybe slightly larger where we are in Qld. Refrigerated system would probably cause mould in qld. I'd say its hotter where we are than there. Its not the heat thats the problem, its the humidity. |
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oldie
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Post by oldie on Nov 24, 2017 22:15:40 GMT 7
Something else worth thinking about is dividing the living areas and sleeping areas up and linking with air transfer ducting kit.
We have a split system in the main bedroom with a duct kit to the toddlers room. It was cheaper to install and run, and (let's face it) how often does the toddler sleep alone without Mum and Dad home?
So not a full ducted air con system, but robbing a bit of air to share.
The possibilities are endless. Ducting from the living area into the kids game room???
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Post by Deleted on Nov 25, 2017 9:42:10 GMT 7
Something else worth thinking about is dividing the living areas and sleeping areas up and linking with air transfer ducting kit. We have a split system in the main bedroom with a duct kit to the toddlers room. It was cheaper to install and run, and (let's face it) how often does the toddler sleep alone without Mum and Dad home? So not a full ducted air con system, but robbing a bit of air to share. The possibilities are endless. Ducting from the living area into the kids game room??? I considered getting split systems in each room but not sure if that'd be too expensive to run, I'd guess yes. My thought is put a full ducted system in and then get a solar guy in to add panels just for the air con but thats another story. |
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