Hi, wanna ask if Multi-split is better or single split is better (both inverter system/unit), if with the condition/scenario as follow:

1. Lets assume i got 3 separate room needs cooling, Master Bed Room, 2nd Bed room (both at 2nd floor), Living room at ground floor. instead if installing 3 single split 1 hp each, is it better with multisplit 3hp outdoor, 3 x indoor blower?

2. When i want to cool the living room, i switch on the indoor blower at the living room, will it summon all 3hp mightiness of the outdoor unit? cooling the the living room faster.

3. then, i go to bed at master bedroom. so i switch-off the living room's indoor unit, then switch on the indoor unit in master bedroom. will it also summon all 3hp coolness into the master bedroom? this will cool the bedroom very fast. then being an inverter system, will it tune down back to 1hp after it reaches my target temperature at 24C?

4. if i switch on all 3 unit, all room will share the 3hp from the outdoor unit. this mean that with the master bedroom and 2nd bedroom being smaller space than the living room, they'll reach target temp faster than the living room. lets say after 1hr, master and 2nd bedroom reached target 24c, while living room still at 26c. now with master & 2nd bedroom has already less cooling demand, will the living room unit now get more cooling power??

5. this scenario lets assume that by calculation, each room's cooling requirement is: Master (1.5hp), 2nd bedroom (1hp), Living room (2hp). you see, when combined, they need 5.5hp of cooling power. but i assume that i won't be always switching on ALL 3 room all the time, it would be rare occurrence.

6. is my impression on how the multi-split system operates correct? because i'm not that familiar with multi-split system.

1st multi system was expansive and longer piping, if you are stay in condo or apartment the developer has put all piping into Aircon ledge then you can consider for install multi split unit for saving space else, otherwise smaller BTU to compare from single unit split as full BTU capacity to support your room cooling Tempeture as low as you need.

Multi split good for saving energy and space else.
The rest like single split for one unit spoil at least the rest still workable.

This post has been edited by kimsim: Jan 3 2015, 10:53 PM

For an example, i'm living in a HDB flat, and i'm only allowed to install 1 compressor unit, so for 2 fan coil unit, I have to use multisplit and it costs SGD2.5k.

If i'm not wrong, a single split inverter 1hp costs about RM1.2k for a very decent one? So much lesser.

1) This option is up to you. Most people opt for multi-split due to small space. Almost all singaporeans uses multi-split due to their law of max odu per house.

2) Higher HP means ur compressor can take in more heat. The cooling rate must depends on your indoor unit heat exchange rate ie. higher fan speed in 2hp blower.

3) Yes. Inverter will adjust the compressor rpm itself.


4) If your whole system is underpower, then of coz living room will have more cooling power when your other 2 room reached their preset temp. If your system cooling capacity is just nice then it would not be any problem.

5) This will depends on your budget. If got budget then of coz go for the safer one which is odu and indoor hp match. If you sure you will not operate all 3 to the fullest then you can save some cost and get slightly underpower.

Btw, which brand you are looking at? Where are you living?

Actually HDB flat only allow to install single compressor outside and gov. S'pore to control maximum Amp for 8.5A = 1920w.

What shall be do? Multi split will do and use single condenser with 1 fan blower outside also help much green envelopment as well.

Unlike 1 room 1 unit = so many heated and blower out hot air at same time to be increse badly global warming.

This post has been edited by kimsim: Jan 4 2015, 06:58 AM

ok so the indoor unit has rated heat exchange capability as well. meaning that if my outdoor unit is 3 hp, the bedroom's indoor unit is 1hp, the max i can get for that room is 1hp coolness??

my idea was like this, lets say by calculation, i need 2hp, 1.5hp, 1hp for my Living room (LR), Master Bedroom (MB), 2nd bedroom (BR2). if i go for single split inverter for each, it should be cost something like RM 2500 + 1700 + 1400 = RM 5600 (incl installation, w/o extra piping)

what if i compare to a Multi split inverter 3hp (24k btu) outdoor unit, with 2hp, 1.5hp, 1hp indoor unit? granted i know if i switch on all at the same time it would be underpower, so i'll try not to switch on all at the same time.

i dunno what brand offers multisplit system.. so far only saw it on york/daikin's website. i live in sarawak and is on landed property. so space is actually not a problem/restriction like those in condos. i just want to know more about multisplit how they work etc etc.

This post has been edited by efaceninja: Jan 4 2015, 07:37 AM

Time to control all room to be cooler, for example like one turn on 30mins before and room 2 turn on same with room 3 for sure 2 & 3 will be delay or slower cooler, unlike single split just turn on less than 15mins can feel the cold as what you need.

The different only less than 15-20mins slower than single split, the rest is wont underpower at all, cause I am using ME multi split system 3 in s'pore now.

This post has been edited by kimsim: Jan 4 2015, 08:07 AM

can share how's your setup / system? 3hp outdoor with 1hp x 3 indoor?
ME.. difficult to find in my place, let alone trying to find ME's multisplit!

Mine used in singapore only, my set up for 1.5hp & 1hp x 2 units for bedroom, the outdoor is 28k btu.

ME you can check nearest your place : http://www.mitsubishielectricmalaysia.com/...ct/where-to-buy

I guess in M'sia multi system would be over price, can be order from the shop.

1hp indoor doesn't mean you can get max 1hp. It means when paired with 1hp odu, the ac can only cool a small room. If continuously cooling but underpower, the compressor will burn. Higher hp can withstand longer time taking in heat.