HWZ Forums

abba77 · 18-06-2009, 11:53 AM

chunlianghere wrote:

yes, it shld be alrite..

but u can on any 2 units wil be fine too. if u on the 3rd one, than it wil takes a longer time for the 3rd room to cool. unless the 1st n 2nd room is cool enough, than the 3rd room wil cool faster.

actually if u were to go through the post, there is 1 having many problem wit his 2 inverter system.

yup..the cost of inverter is alot higher, as the components r alot more n exp than non-inverter.

Thks Chunliang... you are expert

Another question, for a 3m x 6m room, do you think a 10k BTU/hr fan unit is sufficient?

There seems to be a few formula out there (eg.. NTU, renotalk) giving different results :p

cannotliao · 18-06-2009, 12:18 PM

http://www.goodhousekeeping.com/home...ner-calculator

try this.

chunlianghere · 18-06-2009, 02:20 PM

abba77 wrote:

Thks Chunliang... you are expert

Another question, for a 3m x 6m room, do you think a 10k BTU/hr fan unit is sufficient?

There seems to be a few formula out there (eg.. NTU, renotalk) giving different results :p

u welcome!

yes, it is more than enough.. normally a 9000BTU/hr for bedroom is enough too..

cannotliao · 21-06-2009, 09:09 AM

just check with GC

upgrade to G22 Copper pipe is $60
Armaflex 1/2'' $40 per FCU
Armaflex 3/4" $60 per FCU

chunlianghere · 22-06-2009, 07:34 PM

jus to ask some qns..

my house in amk hav gone through main upgrading programme, in which every flat is added an additional room near kitchen. n hav check through hdb website that my blk is installed 40A in every flat. so installing 2 condenser unit is not a problem.

but now the qns is anyone know where can i install the 2nd condenser(outdoor) unit? becos after installing the daikin system 4, the old system 2 is stil in good working condition, so keeping it. actually intend to sell it away, but no where can sell high price.

so my mum wanted to install it for the additional room.

anyone install their condenser unit in their house? can i able to install the condenser unit outside the additional room? jus want to get some comments about the installing 2nd condenser unit(old one).

thanks..

cannotliao · 22-06-2009, 09:52 PM

any comment about the insulation thickness 1/2 compare to 3/4 inch?
some shops people told me is kind of wasting money and too kaisu going for 3/4 inch, manufacturer spec is 3/8, going 1/2 already over spec. why still want go for 3/4 so thick?
the aircon technician even tell me frankly said i'm just letting they making more money from me and ended with a big thick ugly PVC trunking.

is using 3/4 inch too kaisu?

tormont · 22-06-2009, 10:17 PM

recently my hse aircon breakdown..... now i'm looking for sys of 3, best with inverter. I asked a aircon contractor abt the brand to buy... and he quoted me panasonic... but he has yet to quote me the price....

cld any1 recommend me the model for panasonic? or any other reliable brand.... plus could any1 pls also kindly state abt the estimated price on the aircon, especially panasonic. Thnx alot.

chunlianghere · 22-06-2009, 10:41 PM

cannotliao wrote:

any comment about the insulation thickness 1/2 compare to 3/4 inch?
some shops people told me is kind of wasting money and too kaisu going for 3/4 inch, manufacturer spec is 3/8, going 1/2 already over spec. why still want go for 3/4 so thick?
the aircon technician even tell me frankly said i'm just letting they making more money from me and ended with a big thick ugly PVC trunking.
is using 3/4 inch too kaisu?

to wat i tink, 3/4 is too kaisu liao.. by default, as wat manufacturer spec, 3/8 is gd enough. if scare abit, 1/2 is more than enough liao..

unless u wan a frezzer-like room?

terumo · 22-06-2009, 11:16 PM

3/8 insulation is enough for HDB. 1/2 is for commerical and pte apartments concealed piping. HDB don't have concealed piping so 3/8 is enough.
3/4 i think, not many or even no one uses it for installation.

cannotliao · 22-06-2009, 11:47 PM

tormont wrote:

recently my hse aircon breakdown..... now i'm looking for sys of 3, best with inverter. I asked a aircon contractor abt the brand to buy... and he quoted me panasonic... but he has yet to quote me the price....

cld any1 recommend me the model for panasonic? or any other reliable brand.... plus could any1 pls also kindly state abt the estimated price on the aircon, especially panasonic. Thnx alot.

compare them yourself.
i aiming the panasonic too..newer model and seems like with the latest inverter technology.

http://coolserve.com.sg/htmdocs/prod...ls.asp?id=2495

the model is Panasonic CU-3S27JKZ / CS-S9JKZW X 3 8,530Btu/hr
Gain City $2799 with GST
cheapest quotation from the amk shop EverJoint, around 2.5k with G23 copper pipe and 3/8'' armaflex.
want thicker need to top up $$.

cannotliao · 22-06-2009, 11:49 PM

terumo wrote:

3/8 insulation is enough for HDB. 1/2 is for commerical and pte apartments concealed piping. HDB don't have concealed piping so 3/8 is enough.
3/4 i think, not many or even no one uses it for installation.

how about fire retardant?

for HDB worth to pay the extra for class 1 to class 0?

the copper piping from G23 to G22 should worth the extra $$ ba?

thank.

chunlianghere · 23-06-2009, 11:00 PM

cannotliao wrote:

how about fire retardant?

for HDB worth to pay the extra for class 1 to class 0?

the copper piping from G23 to G22 should worth the extra $$ ba?

thank.

jus care abt the thickness can liao la..

unless u r using inverter, than worth it. for non-inverter, not worth lor..

chunlianghere · 23-06-2009, 11:02 PM

btw anyone knows where can i get insulation tape?

cos some part wil hav some small water vapour. so wanna patch it up.. best if can buy it online.

thanks!

terumo · 24-06-2009, 12:51 AM

Copper piping, G23 is good enough for hdb or condo. Suitable for R22 or R410 gas systems. G22 is for commerical usage. Upgrade to G22 is like paying for something you don't need in the first place.