I'm looking at replacing my heater/air condition in my house.
It is 4 bedroom, 2 living. The original house plans show is being a 25.7 square house (or 238.7 sqm).
Taking the bathrooms, laundry, walk-in robe etc out, it is roughly 170 sqm.
We have 2.7m high ceilings.
I've had a few quotes.
1 insists a 22kW system is needed.
The other one I looked at is saying that the Daikin FDYA160 16kW system will be adequate as it will be setup with MyAir and that if we don't run all zones at the same time, he is confident it is sufficient. Also said this system can do 17kW on cooling and 20 on heating.
A few online calculators give me different results. The Actron calculator is telling me 27kW, another one said 22kW and another said 18kW.
Does 16kW sound like enough for a largish 4 bedroom home?
We have 3-phase available, so is there any harm in going a slightly bigger system, such as a 18 or 20?
Last thing we want is to spend 15k on a new system and it not really be adequate enough.