Originally Posted by khoj (Post 3094308)

Aroy, that is a great price for the 1.5 ton Daikin. Would you mind sharing who the dealer is either here or via pm. BTW all new units come fully charged from the factory and are also completely imported even when they have R22, unless something has changed in recent years.

Originally Posted by isldhn (Post 3094485)

I was looking for an ac for my room measuring 13' * 13'. All the showroom owners suggested 1.5 ton . I had a look at the sharp models and saw a model 18lmt which is last years 3* but this years 2*. It is available for 30 K. My usage would be for about 8-9 hours daily. This would be at night time and I have a room built on top of my room, so the room does not get that hot.
What sir would be the difference in power consumption between this model and a 5 star one.

Originally Posted by sgiitk (Post 3094826)

.....
While we are all aware of Spilt AC condensers failing due to corrosion specially in coastal or polluted areas.

We have barely come across cases of car AC condensers failing due to the same reason. .....
Why?

Originally Posted by sgiitk (Post 3094826)

I am raising a thought which just came to my mind.

While we are all aware of Spilt AC condensers failing due to corrosion specially in coastal or polluted areas.

We have barely come across cases of car AC condensers failing due to the same reason. These are invariably made of Aluminium. Accident or gravel damage yes, but age / corrosion no.

Why?

Originally Posted by anupmathur (Post 3094846)

I think the reason is that car AC systems have pipe connections made with rubber hoses and compression fittings whereas home ACs have pipes brazed to each other......Are they?

Originally Posted by alpha1 (Post 3095530)

You may also add: proximity to nalas that carry hazardous industrial wastes, and degradable bio waste. Delhi/Noida/Ghaziabad has many such cases ...

Originally Posted by Aroy (Post 3094375)

The dealer is a friend of my son, based in C R Park. They mostly supply to projects. In case you are interested PM me and I will send you the details.

Many Diakin models in the R22 range are made in India, it is only the R410 and multi-splits that are imported.

Originally Posted by anupmathur (Post 3094846)

I have also wondered about this.
I think the reason is that car AC systems have pipe connections made with rubber hoses and compression fittings whereas home ACs have pipes brazed to each other.
I do suspect that most of these reported cases of condenser failures are not condenser tube failures as such but are failures at the brazed pipe connections. Are they?

Originally Posted by sgiitk (Post 3095883)

Not necessarily. Brazing copper and Al is not an easy thing, so often the ends are copper.

Well said.

I am getting a feeling that car AC condensers are of a a heavier and better grade of material.

Originally Posted by c/o khoj

I have been researching a lot on the internet about the air conditioners and one forum which has stood apart for me is team-bhp. I have read quite a lot of posts there from you and the sir from IIT and they are very helpful indeed. I have tried a couple of times to make an account there but sadly I can't seem to pass through.

Will it be possible for you to make this post on the air conditioner thread on my behalf? I have been following the thread from a long time and I believe that there are many knowledgeable and active people there whose advice will be very valuable for me.

In case you decide to accept my request, here is the message which is to be posted:

Originally Posted by c/o khoj

"I need to buy 3 AC for my home. Here is what I am thinking (Critiques are appreciated!):

1. Top floor 14.5x12 Room. South Wall partially exposed to direct sunlight. Mostly night usage.

I am thinking of buying this 1.5T Mitsubishi Heavy Industries 5 star AC. Excellent AC with 3.55 COP!



Alternative : Daikin 1.5T inverter(phasing out??) or Daikin 1.5T 3 Star or MHI 1.5T 4 star???



2. 2 rooms, 10x14.5 and 13x12 on 1st floor and is surrounded by rooms on all sides, top included. So no direct sunlight. Marble flooring too! (Living in Ludhiana.)
I have found out the optimum tonnage for the room should be about 1.1 ton. However, the 1ton inverter can overwork itself upto 1.2tons initially to cool faster, hence overcoming the problem.

Normal power consumption of a 5star 1.5ton AC is about 1600W while for the one ton is just 950 watts. Even with 50:50 ratio of on-off cycle, the average power consumption for 1.5 ton will average out to be near 800w. The 1 ton one might consume additional power at first but when temperature will stabilize, it'll end up using almost same or maybe even less power. Hence there is no justification to spending 12k extra on 1.5ton AC.

I am confused about these two models here:

MHI 1.1T 5 star :

or

Daikin 1T Inverter R22.

My observations:

MHI 1.1 is rated at 12.2k BTU while Daikin 1T Inv is 10,900 (5,450-13600) BTU. So according to the specifications, the Daikin should be able produce more cooling power by overloading despite being underrated. Any comments on this? Can anyone with an inverter ac clarify how effective is this overloading?

MHI's power consumption is 750-1065W. From what i've read, it is due to the expansion valve which is found on MHI ac only.

I am tilted towards Daikin because on paper it looks better than MHI and has more useful features (Also I am somewhat fascinated by inverter technology and it's benefits ) but a dealer friend of mine is pushing for MHI one which according to him has better performance. There was also something about r22 + inverter being not so good as r410a + inverter.

What do you think guys? Any comments? Inverter owners specially please reply!

Note: No R410a because I already have normal copper wires installed inside the walls.

Thanks!

Originally Posted by naveen.raju (Post 3096435)

Guys, I have a question. Have been using Voltas 2.5 ton AC in my bedroom for many years. Few days back, it's failing to cool. The AC mechanic cleaned the unit, replaced the capacitor and still no luck. He said that compressor needs to be changed and said it would cost around 10k. I doubt whether the compressor is at fault since the compressor fan is working. If I need to change the compressor, will a 1 ton compressor work fine with this 2.5 ton split? The room is pretty big with two laptops running throughout the night.

Expecting a quick response. Need to make a decision tomo.