8 hours ago, Anthony5 said:

 

No the Thai estimate isn't twice of what Crossy quote. 600 BTU/sqm meter is the international standard. In fact Daikin Thailand recommends 750 BTU/sqm

 

This is a calculator from a non Thai based website, and it says 600 BTU/sqm

 

http://www.airconexperts.co.za/btu_calc.html

And this  one calculates mine at 8300 btu for 48m2 ,totally  different 

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

this  one says  i  need 1100btu for  Darwin Australia similar  to  thai  climate 

http://www.rapidtables.com/convert/power/kW_to_BTU.htm

this  one  from daikin malaysia  says  almost  27000k

http://www.daikin.com.my/heat-calculator/

This  Australian one says about 18000btu up to 60m2 

http://www.currentforce.com.au/room-sizing-guide/

3 hours ago, kannot said:

my 50m2 house double,  block walls surrounded by trees, vented  roof, insulated concrete tile   roof, 12mm gyproc ceilings. upvc windows is  kept at 25-6c  all year round  by one 10000 btu samsung non environmentally friendly  old type  refrigerant non inverter

Winter 900-1000 baht  summer 2000 baht/month on at least 18 hours  a day minimum

Summer  temps up to 42  c outside I live in a  field,  no other neighbours, heat radiated up from the ground here is a massive factor

 

the rear of our house faces undeveloped land and gets direct morning sun...we useta have a solid row of banana plants protecting the wall planted by the MiL when we first moved in but some have fallen over and now it gets hot back there on the ground floor where my kitchen is...gonna havta restore the bananas...

12 hours ago, lopburi3 said:

 

Perhaps during retirement tutsi can age graciously and just rock in peace.

 

13 hours ago, Anthony5 said:

 

Made my day, actually made the next 4 years bearable. Thanks !!