QUOTE(joeblow @ Apr 29 2021, 11:57 PM)
Hi, can I check with you if price diff only RM280 for 1HP and 1.5HP for this model Panasonic Inverter R32 X-Deluxe Air Conditioner CS-XPU13WKH-1, makes sense to go for 1.5HP even for small room? I plan to have my master bedroom and my TV room installed with this 1.5hp. According to my installer, higher hp actually saves power. Not sure not true this is as he argued will reach my desired temp faster.
1st thing is..you must understand the 1.5 is not really a true 1.5hp.
It is more to a 1.3hp.
Why this is so>
because 9k Btu class = so called 1hp.
12k btu class = so called 1.5hp but its only 33pc more btu cooling capacity than 1.0 so its more like a so called 1.3hp.
The big jump to 18k btu class = so called 2hp.
SMALL ROOM
So if the room is tiny (defined as after putting the bed in, there is not much space to walk around)..1hp will be sufficient as typically heat load only 5k or 6k btu. Perfect for 9k btu AC.
If the room is top floor of DSL landed or west sun facing (meaning the wall radiate alot of heat into the room) where without aircon your room is hot like sauna then skip to 12k btu AC directly.
It also depend on your usage pattern.
If you set to 25-27C then it will be sufficiently covered with 9k btu class.
If you like to run it 16C freezer then skip to 12k btu class.---------
BIG ROOM
If the room is big enough to fit 2x double beds and still have space to squeeze in a small yoga class (with few mats) then this is a big room and is best served with a 12k btu AC.
Higher hp 1.5 does not always save power if the AC is properly sized for 1hp. The correct sizing of the AC to room size + heat load is important.However if the room is so big that the 1hp is struggling at maximum load (inefficient EER turbo mode) then a 1.5hp will save power because it can operate in normal EER range (efficient range).
A big 2hp for a tiny room will still consume more power than a 1hp if both have achieved target temp and running slow mode.
Just like a viva idling in traffic jam vs a camry in traffic jam.. both doing nothing but idling in jam only.. the camry being 2L car will always use more fuel.
QUOTE
For small room size the aircond run for short while to easily achieve target temp..so if the extra cooling not required it will be 20pc cheaper to run 1.0hp than an overpowered 1.5 for small room.
If the 1.0 can cool it down pretty fast in 40min then u can say after the initial cooling work it just maintain slow mode @ 225W for another 7h20 = 1649Wh
If 1.5hp maybe it cool down in 20min after that minimum it work @ 275W for another 7h30 = 2062Wh
Assuming u run 8hrs to sleep lah. Then the 1.0 will have saving of 50W per hour if it is very light load like maintaining temperature.
This was a spec comparison for another forumer, between the X-Deluxe Pana models which will give a representation of how it works between 1.0 and 1.5QUOTE
Between the 1.0 and 1.3 (1.5 is actually 1.3)
If the room is tiny and there is no space to walk around the bed then 1.0 should be enough, especially if its not evening sun-heated.
If the room is bigger i.e. can put 2 double beds and still have lots of space to walk around OR if its a west-facing sun room OR its the upper floor of a double storey then 1.5 better.
Coz in terms of power consumption as you have an inverter, both are quite economical to operate slowly
btu of 1.0 9,680 (3,070-11,600)
btu of 1.5 12,500 (3,480-14,000)
at the low end (slow mode) difference only ~10pc / 3xx btu
Power range
1.0 730 (225-1,030)W
1.5 990 (275-1,160)W
They cannot make it too slow otherwise the gas/liquid unable to flow back to the other side properly. so there will be a bit of power consumption increase in the 1.5 vs 1.0 when both are in slowest possible mode.
EER rating higher is better
1.0 13.26 (13.64-11.26) EER (min-max) Btu/hW
1.5 12.63 (12.65-12.07) EER (min-max) Btu/hW
Generally from EER perspective
when in slow mode ie already achieved target temp, the 1.0 is super efficient, 1.5 slow mode is very efficient,
when working hard the 1.0 NOT so efficient (11 EER is average), 1.5 still good (12 EER)
This post has been edited by ceo684: Apr 30 2021, 12:25 AM Attached thumbnail(s)