Air conditioning - Any recommendations please?? - Part 2

[Jun Jun]

But honestly now in a dilema. Because I am quite happy with the features of my panasonic and it is just the sound that is bothering me not sure what is the issue. And also not sure if a flushing can fix the issue. Daikin wise quality lost to last time, am sure compared to panasonic about the same or also lose. And as some mentioned the motherboard and thermostats are the usual ones that keeps breaking down... u can feel the louvers of the daikin especially the internal one, it is not as well made as panasonic. The casing however is slightly better than panasonic. So pros and cons. Both balances out each other uh.... and daikin current promo is 3 years warranty while my panasonic is ending soon.

 

[Jun Jun]

don’t think pana will have any improvement.
Pana always cutting cost and pricing never go up to meet up overall markets.
Previously I support pana fridge and washer as well. Also tv.
Now change to hitachi fridge , tv oled LG and washer Bosch.
No more pana item in my house.
The best pana is after replaced name from
National to pana, during that time for everything are durable with premium quality out there.

I believe compared to the old units of a few years back, their current batchs seems more sturdy and improved, as I still have the 2008 or 2009 first inverter modelcasing turned yellow.

 

[007Mi6]

Don’t talk bad on pana, later 007Mi6 come here bomb you back.

Why don't you share about Panasonic Singapore Aircon you installed, how bad it was?

 

[007Mi6]

Daikin MKM75VVMG without 8.5A limitation.
2.5+2.5+5 (6kw to 8.75kw) 20k to 29.8k BTU
With 8.5A limits (6-7.17kw) = 24,464 btu maximum load.
When during installation , try to max out that btu limitation of 8.5A amp to 11A , much quickly to reaching cooling power.

While we are looking to save energy, we have people who likes to encourage people to unlock their current limiter and make the 5 tick inverter into a 0 Tick non-inverter

 

[obichacha]

Why don't you share about Panasonic Singapore Aircon you installed, how bad it was?

Singapore bad? Then you still wanted to install?
No worries after install got an issue?
Good luck bro

 

[obichacha]

While we are looking to save energy, we have people who likes to encourage people to unlock their current limiter and make the 5 tick inverter into a 0 Tick non-inverter

Why cannot unlock current limits?
since everyone prefer more cooling than energy saving
Otherwise you guys looking for 3 system instead of system 4, need more cooling and capacity, but don’t know the current limits locked at 8.5A.

 

[Jun Jun]

Why cannot unlock current limits?
since everyone prefer more cooling than energy saving
Otherwise you guys looking for 3 system instead of system 4, need more cooling and capacity, but don’t know the current limits locked at 8.5A.

Also not sure if they unlocked my sys 4 current limiter. How to check if it is unlocked?

 

[obichacha]

Also not sure if they unlocked my sys 4 current limiter. How to check if it is unlocked?

daikin or Pana, if starmex outdoor instruction manual has mentioned.
Basically 8.5A locked for old Hdb flat without wiring upgraded.
All those new flat / BTO no issue on without limitation, capped on 20A on each isolator.

check your user manual

 

[007Mi6]

Also not sure if they unlocked my sys 4 current limiter. How to check if it is unlocked

Panasonic has no current limiter.

which is why your 4XU33YBZ can go 3kW per hour if not careful, can use $7.80 per night or $233 per month.

which is why I always go the extra mile to ensure people know what they are going for, so expectations are met

 

[ZacharyA]

I have used Panasonic for over 10yrs, no issue. Only issue is the condensation which is caused by the trunking which has degraded over time. Replaced at 12th year mark with Daikin and new pipings and insulation.

For me, I feel that 25 degrees on Panasonic is colder than 25 degrees on Daikin. On Daikin I need to lower to 24 to feel the same. Similar to @mark lim 's observations between Starmex vs Daikin.

And I think you @obichacha have issues with comprehension. @007Mi6 asked you to share your experience with Panasonic, but you replied with questions. It really baffles me.

In your last reply, I also do not know why you trying to get at. I am just explaining that for a 3 room flat there is only space for 1 bracket for compressor which is in the master bedroom. And then you replied some irrelevant stuff.

 

[ZacharyA]

And then trying to act cute by being sarcastic and using emojis. Damn childish.

 

[mark lim]

While we are looking to save energy, we have people who likes to encourage people to unlock their current limiter and make the 5 tick inverter into a 0 Tick non-inverter

if you have been browsing the NEA measurements and daikin, Starmex catalogs over the last 15years you will see that R410 to R32 gas, all the manufacturers does to meet NEA ticks is to strangle the compressor putting current and reprogramming the the outputs. i dont have the details but i can bet that the compressor has hardly change over the last decade. in the end with a similar Hardware the only way you can be get more NEA ticks is to cut the cooling output and change the SW controls. .

i quote the 2023 star catalog R32 and 2019 catalog for the R410. for 3H28 itis 6.2kw and for 3A28 it is 7.5kw.
https://coolserve.com/wp-content/up...i-Electric-Starmex-Catalogue-R32-Jan-2023.pdf
https://coolserve.com/wp-content/uploads/2020/06/STARMEX-MARCH-2019.pdf

 

[ZacharyA]

if you have been browsing the NEA measurements and daikin, Starmex catalogs over the last 15years you will see that R410 to R32 gas, all the manufacturers does to meet NEA ticks is to strangle the compressor putting current and reprogramming the the outputs. i dont have the details but i can bet that the compressor has hardly change over the last decade. in the end with a similar Hardware the only way you can be get more NEA ticks is to cut the cooling output and change the SW controls. .

i quote the 2023 star catalog R32 and 2019 catalog for the R410. for 3H28 itis 6.2kw and for 3A28 it is 7.5kw.
https://coolserve.com/wp-content/up...i-Electric-Starmex-Catalogue-R32-Jan-2023.pdf
https://coolserve.com/wp-content/uploads/2020/06/STARMEX-MARCH-2019.pdf

Does the type of refrigerant affect cooling performance?

 

[obichacha]

Does the type of refrigerant affect cooling performance?

Seem like my old model starmex 3 R410a much faster reaching room temperature from preset than the new R32 taken longer time.
Not too sure is room layout, for my common room can tell that slightly slow than the R410a.
In term of cooling , both are more or less same. Just starting up from R32 need more time than the R410a.

 

[Andy0601a]

100% full loads capacity to set on 16c with max fan speed on each room.
Low load minimum work on midnight or during raining night, till next morning. The outdoor condenser fan can tell that spinning in low rpm with quiet noise.
standard rates, set on 25-26c with fan 1/2 bar speeds.
All Aircon specification has mentioned: standard rate with max capacity output. 6.5kw to 8.9kw something.
This is just a guided

3 rooms on at same time probably running 22-23 in 2 room and 24-25 in 1 room, night time.

I will just go with you guy's recommendation of 28vg over 33vg.

 

[007Mi6]

If money is not the priority and you have space to put 2 compressors, the ideal will always be 2 separate systems. Maybe 1 to power the living and the under usage common room and the other for day common and night master.

I am looking at your set up as well but primarily from a cost savings perspective instead of having 2 systems.

I will not use either of the two common rooms as my home office / study will be in the living room. Still trying to work out a best layout so that maybe I can go for a system 5 and isolate a part of living room for study / office so I can use a 9/10k FCU to cool it instead of using a 18/24k to cool the entire living room.

Also will eat into some part of the open concept dry kitchen area so will use a lot of electricity just to cool the entire living space for day usage (working).

I was trying to trace back this.

you have a 4rm resale but trying to craft a study area with aircon?

You don’t have a lot of options for system 5.

alternatively can try foldable doors or partitions which can be costly, but still keep to using system 4 (24K in living)

 

[ZacharyA]

I was trying to trace back this.

you have a 4rm resale but trying to craft a study area with aircon?

You don’t have a lot of options for system 5.

alternatively can try foldable doors or partitions which can be costly, but still keep to using system 4 (24K in living)

Yes. Home office / Study area within living room. Exploring a half height partition wall with a foldable (upwards or bifold) glass.

To cool the entire living room with a 22-24k btu will consume quite a significant amount of electricity. So I wanted to explore the idea of having 2 units, 1 x 9k for the small study area and 1 x 18k for the remaining common living room area.

The length wise of the living room windows is so long that it is hard to add a door to conceal the opening to the study room. So probably might have to consider having it open as it is. One option probably is to install a corner fan to blow the air backwards (towards the FCU direction) where the 2 standing desks will be.

In terms of System configuration, looking at either System 4 / 5, or System 2 + 2 or 2 + 3. Trunking and all will also be a consideration since more FCUs means more piping and the trunking can be unsightly for so many pipes.

Need AC installer to advise before committing to purchase but somehow it's a chicken and egg situation where you only meet installer after you purchase the AC. And most salesman in departmental stores are not the best person to advise on how to plan.

 

[obichacha]

3 rooms on at same time probably running 22-23 in 2 room and 24-25 in 1 room, night time.

I will just go with you guy's recommendation of 28vg over 33vg.

28VG on my current 5 room BTO.
I set on 2 common room in 26c with 1 fan bar , my master bedroom, use same temp and fan speed, can feel cooling enough.
I don’t know , maybe some ppls prefer much lower temperature to meet their requirements.
Again the 28VG (3 room) vs 33VG (3 room) both are the same cooling, except the 33VG able to install on living room. That is the benefits on 33VG.

Below is my current new BTO setup

Spoiler

 

[mark lim]

Yes. Home office / Study area within living room. Exploring a half height partition wall with a foldable (upwards or bifold) glass.

To cool the entire living room with a 22-24k btu will consume quite a significant amount of electricity. So I wanted to explore the idea of having 2 units, 1 x 9k for the small study area and 1 x 18k for the remaining common living room area.

The length wise of the living room windows is so long that it is hard to add a door to conceal the opening to the study room. So probably might have to consider having it open as it is. One option probably is to install a corner fan to blow the air backwards (towards the FCU direction) where the 2 standing desks will be.

In terms of System configuration, looking at either System 4 / 5, or System 2 + 2 or 2 + 3. Trunking and all will also be a consideration since more FCUs means more piping and the trunking can be unsightly for so many pipes.

Need AC installer to advise before committing to purchase but somehow it's a chicken and egg situation where you only meet installer after you purchase the AC. And most salesman in departmental stores are not the best person to advise on how to plan.

you can get a rough gauge of prices of system 5 vs system2 +sys3 on coolserve. this is what i use when roughly comparing equipment cost. for sure it is not worth it to go for a system5. i only see all negatives unless one is restricted by only one compressor and nothing else but 1 compressor. then you go for this option.