Dec 25, 2016 7:41 am
I have an old box type air conditioner in our family room that I installed about 15 years ago.
At the time the ratings were in HP. It is a 3 HP unit,probably the biggest you could get at the time.
The family room is roughly 60m2.and it cools this room effectively
Looking at swapping it over for a split system only because of the noise factor.
When I look at the conversion tables they tell me that 3HP = 2.2 KW.yet the sizing tables tell
me I need a 6-7 KW unit to cool this area.The say that 2.2 KW unit is ok for small bedrooms,study's etc.
Whats going on?
Re: air conditioner sizing3
Dec 27, 2016 9:25 pm
It depends on whether you are talking about power input or refrigeration output.
A modern air conditioner is about 300% efficient. Some are even better (see http://anewhouse.com.au/2016/12/air-con ... han-price/)
So for every 1kw of power in you get around 3kw of refrigeration so.....
Power input of 3HP = Power input of 2.2Kw = 2.2 x300% of refrigeration output = 6.6kw of refrigeration output.
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Re: air conditioner sizing4
Jan 05, 2017 8:34 pm
While choosing an air conditioner for your home look for some of these features — sleep settings, filter alerts, remote controls, energy-saving options, timers and noise insulation. Room air conditioners which match Btu requirements to room size are best because the rooms won't cool efficiently if the Btu rating is too low or too high for the size of the room.
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