I guess I look like a water fish to the contractor, below is the conversation between him and I:
C: how's your consideration of the offer?
I: I will engage other contractor to do the work for me.
C: why?
I: the price is quite high.
C: I propose that you installs back to back, I can re quote accordingly.
I: no need already.
C: May be we can negotiate the price.
I: no need already la. You cannot compete one.
C: how much is the offer?
I: 4 to 5k like that lor.
C: 4k impossible la, 5k plus may be can do la (WTF, want to cheat 3k at least on the first quote)
I: WA... Two to there k different wor....  
C: previously what I quote is Hitachi brand piping, the highest end for the air con piping, may be we can use the middle range piping.
I: no need already la, I decided to install after I get the key.
C: don't decide first, let's compare the price, you give me his quotation then may be I can quote you cheaper leh, but you must let me installs for you la... Some more if do it later the finishing not nice one. (cilaka, can't cheat me this time and think of cheat me next time)
I: ok la, let's see how la... (impossible to let him do the work, big buaya)
C: ok, thanks

So guys, get more information from the forumers here, at least you have the bullets to nego with the contractor.

lol....kena kantoi oredi he still dare to ask u to give him do....muahaha!!
he think he is the only 1 can do meh........care to share company name so others can beware....

my house still under construction and he is the only can do the work before I can get the key. He is from sitiawan.

where ur house?? what u mean he only can do the work?? no others contractor??

On going development at sitiawan by dkls, then the contractor is the only authorized contractor that can do the air con work for us... so I need to deal with the contractor if I need to installs the drain pipe and copper pipe during  construction is on going.... otherwise I need to wait till I get the key after completion then only can installs the piping lo... My idea is  to minimize the hacking work LO...

oic....must rasuah him kau kau so he do the job nicely....if not later install the aircond cannot work then hacking again......by the way i think u need to know what type of aircond u planning to use....inverter or normal....only daikin inverter can use normal copper pipe if not mistake....others brand inverter need to change...

Guys.. ask ur opinion..

2 contractors quoted me different price.
(inverter type + conceal 0.61mm copper + conceal pvc drain pipe + hacking)

items:
2hpX1
1.5hpX3

1. one quote me . 2.3k lump sum
2. another one quote me . 3k lump sum (certified air con installer)

1st guy refused to give me a quotation list. Said he have a lot of experience installing air-con. 14 years. Recommended by the shop that I bought air con from.

2nd guy is a certified air con installer. Normally did those high rise buildings. He only recommend best of the best material. Initially he quote me 4.2k for everything. He include insurance coverage in the bill as well. He will later breakdown the cost and air con installation diagram to me. He told me their way of doin stuff are totally diff than uncertified installer. They follow strict guideline from those association. If wrong, they may lose their license. Means ada standard.

Now, I need to choose. In dilemma now.

bro...can i ask you...how far is the outdoor unit to indoor?

Guys.. ask ur opinion..

2 contractors quoted me different price.
(inverter type + conceal 0.61mm copper + conceal pvc drain pipe + hacking)

items:
2hpX1
1.5hpX3

1. one quote me . 2.3k lump sum
2. another one quote me . 3k lump sum (certified air con installer)

1st guy refused to give me a quotation list. Said he have a lot of experience installing air-con. 14 years. Recommended by the shop that I bought air con from.

2nd guy is a certified air con installer. Normally did those high rise buildings. He only recommend best of the best material. Initially he quote me 4.2k for everything. He include insurance coverage in the bill as well. He will later breakdown the cost and air con installation diagram to me. He told me their way of doin stuff are totally diff than uncertified installer. They follow strict guideline from those association. If wrong, they may lose their license. Means ada standard.

Now, I need to choose. In dilemma now.

I was being quoted:
1) 2HP x 1 = 30 ft
2) 1HP x 3 = 80 ft

Total RM2.2k. Including copper piping, PVC water pipe, conceal and install without piping. Is the above reasonable?

Thank you

I was quoted to installed for 2HP with inverter with conceal 1st 10ft is rm420 and thereafter is rm30/ft.  I am likely to have 20ft of pipe from my living hall to the roof above my parking, costly me a rm720 for concealing a living hall aircond, good price?

I was quoted to installed for 2HP with inverter with conceal 1st 10ft is rm420 and thereafter is rm30/ft.  I am likely to have 20ft of pipe from my living hall to the roof above my parking, costly me a rm720 for concealing a living hall aircond, good price?  The aircond water piping is already included in this the price.