Which aircon is the best that can circulate the whole house (including room when door open)?

[LOBSTER07]

I just want to buy 1 unit of aircon if possible..1100sqf- 3 room and 1 hall..i havent move in yet

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[The Ref]

The price of an aircon that is powerful enough to keep 3 rooms cold would be higher than the cost of a 3 head unit (about $2K)
Look for the sales and Expos if you want a better price.

[tt1973]

Cooling your home can be expensive, especially if you live in a hot climate. Some months it seems like the air conditioner runs more than it doesn’t, making the sheer thought of opening your utility bill horrifying. People have devised a number of theories on how they can save money on air conditioning costs, but no theory is as pervasive as keeping interior doors shut. Basically, the theory is: if you shut doors to rooms you’re not using, then you won’t have to cool them, which should save you money.

I agree. Doors should be shut, don't think the aircon can cool the entire house including those opened rooms

[sundaymorningstaple]

Based on the info given and HVAC calculations this is what your Single Split Aircon will cost approximately......S$3300.00