Apr 5 2021, 01:56 PM
QUOTE(kucingfight @ Apr 5 2021, 01:25 PM)
thanks sis (not bro-i'm aware) , for the detailed feedback. did sort of see you @ FnF topic, but now at home reno
lol..basically, stick with the well known brands.
a) besides the features, are this BTU thingy mainly on paper? would the actual fact that it's running on inverter, power consumption would be around the same?
b) are AC these days have easy to remove blower model? i usually like to DIY cleaning unless there's a big issue that i cannot solve.
thank you
a) Thanks lol..basically, stick with the well known brands.
a) besides the features, are this BTU thingy mainly on paper? would the actual fact that it's running on inverter, power consumption would be around the same?
b) are AC these days have easy to remove blower model? i usually like to DIY cleaning unless there's a big issue that i cannot solve.
thank you
In practical terms it is a matter of time only before the AC cools down to target temp for the same heat load.
As 1 BTU/hr is the heat energy needed to increase 1 pound of water by 1°F.
Assuming that the AC is properly sized for the room, at the same airflow (fan speed), if a 8000 btu/h AC may take 1hr to cool down the room to 22C, then a 9700btu/h AC may take just 47.25 minutes to cool down the room to 22C. (assumed values pluck from the sky to compare for btu and time taken only, not actual representation of time to get to 22C).
This is where most people complain the lesser-btu AC is slow to cool down the room (as the time difference expands for lower target temp say 18C)..
If you set it around an easy-to-achieve warm temperature like 25C on a not-so-hot weather day, time difference to achieve the 25C not very big.
On a super hot summer day where outside is 38C and target temp is low say 18C to cool that 20C delta might take very long with a small btu performance aircond.
If the room has high heat sources like kitchen or server room then it may take longer to achieve the target temp.
If the aircon is undersized such as trying to use a 1hp for banquet hall, it will not save power as it can never achieve the target temp in a reasonable timeframe even though it is running 100% all the time.
Power consumption generally about the same since it will slow down to the slower setting once target temp is reached, assuming all else equal but smaller compressor motor in the 8000btu unit.
besides the additional features like ioniser or fine filters (nanoe nanox, titanium filter etc) - Overall power consumption will be the around the same for inverter (given the same heat load).
Whilst inverter is essentially a gearbox for the aircon, nominal btu is measured assuming the AC operate on normal mode (not turbo mode).
Turbo mode variables will be how much one can redline the compressor motor (heat pump) and IDU fan blower safely without blowing up, usually limited by the either the motor design and/or cooling coil thermal performance.
Generally turbo mode adds 10pc btu capacity to the nominal btu; but this is "generally" as some AC already quite close to redline even on the nominal btu so the diff between nominal and turbo btu may be very small.
Some mfg turbo cool mode are timer limited to say 20-30mins so that it minimise wear and tear on these parts.
b) Most of them are fairly easy to clean for the filter.
For the blower, aka "merry go round tube". Most AC need to remove the IDU plastic cover with few screws to access the blower fan.
For the angle fins, Mitsu Easy clean is pretty easy
For the IDU cooling coil some have Frost Wash/self clean mode. But for AC with fine filter (PM2.5) like Daikin Smarto, Pana Nanoe, they prolong the interval that you need to clean the IDU coils.
This post has been edited by ceo684: Apr 5 2021, 02:03 PM
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