Rooftop A/c's

reddy6980 · 6th October 2009, 10:28

I have seen many rooftop a/c's in vehicles like Force traveler.
Now the question, do these A/c's run on compressors connected to the engine or do they run on batteries.
What is the cost of such a/c's.

gigy · 6th October 2009, 11:02

Even i am looking for information on such thing for omni.

silver_shadow · 6th October 2009, 23:32

all vehicle ACs work off the engine AFAIK.

WanderNomad · 7th October 2009, 00:05

Quote:

Originally Posted by silver_shadow

all vehicle ACs work off the engine AFAIK.

Unable to understand what do you mean. All ACs depend on the engine to work (compressor is connected with a belt called AC Belt to the engine). Have heard in some buses etc there is a special generator to drive the AC but I guess the Force ACs work with the engine only.

honda3938 · 7th October 2009, 08:50

The roof mounted blower has cooling coils and blower . The cooling coils are connected to the compressor and blower to battery . The are similar to in dash ac but are roof mounted to give better cooling at rear.

amitk26 · 7th October 2009, 09:08

Guys he is not asking about roof mounted coils and blower as in Tata Safari , In commercial vehicles like AC Buses and Tempo traveler full AC unit including compressor is mounted either in rear or on roof top ( in case of traveler)

As far as I know a separate engine is used to drive this Auxillary AC unit and it is not driven from Vehicle engine as the AC load for a bus / mini bus would be huge on the main engine.
Driving using battery is also futile because battery is actually charged by Alternator which again means same load on engine + Conversion losses

Usually on traveler these AC are of Carrier make but I have no idea about the cost.

anupmathur · 7th October 2009, 09:34

Quote:

Originally Posted by reddy6980

I have seen many rooftop a/c's in vehicles like Force traveler.
Now the question, do these A/c's run on compressors connected to the engine or do they run on batteries.
What is the cost of such a/c's.

All that is mounted on the rooftop is the condenser and a fan. The compressor stays in the engine bay.
On large buses a separate engine-driven compressor is used and the engine + compressor + condenser assembly is roof mounted.

reddy6980 · 7th October 2009, 09:34

In Force site they have mentioned that the AC's used are of Subros make.

Trust_In_Thrust · 7th October 2009, 14:58

I asked for a quote for such ac from a company in faridabad. If i remember correctly it was sidwal and the quote i got was around 80,000 Rs .This inlcudes everythin for the ac and installation.And this was the smallest ac they have.
Now for what i was looking you guys will not believe , i thought to make the ac of 800 more effective .
LOL

honda3938 · 7th October 2009, 15:12

Quote:

Originally Posted by Trust_In_Thrust

I asked for a quote for such ac from a company in faridabad. If i remember correctly it was sidwal and the quote i got was around 80,000 Rs .This inlcudes everythin for the ac and installation.And this was the smallest ac they have.
Now for what i was looking you guys will not believe , i thought to make the ac of 800 more effective .
LOL

i am unable to understand whether you want the ac for traveller or for maruti 800?

Trust_In_Thrust · 7th October 2009, 15:47

^ These ac that are mounted on roof top come sin various sizes . I chose the smallest for the M800 but was not cost effective .
Now dont' embarrass me again saying you want to install this in M800.I know i was insane.
But now i have a new design in mind for the 800.

Takumi-san · 7th October 2009, 16:38

Ok,I cant let this go.

MARUTI 800 MATE ? ARE YOU SERIOUS!

hehe, fine I wont push it.

silver_shadow · 7th October 2009, 17:49

someone told me about a little fan that you can fit on the roof between the passenger seats and driver seat which will channel some of the AC air towards the back. supposedly it's quite effective. instead of looking at roof mounted ACs which will cost almost as much as the car and add to it's instability you might want to try the fan which is alot cheaper!

anupmathur · 7th October 2009, 21:36

Quote:

Originally Posted by Trust_In_Thrust

....
Now for what i was looking you guys will not believe , i thought to make the ac of 800 more effective .
LOL

I would not consider you totally insane!
If you were to shift the condenser of the existing AC to the roof at a 30 degree rake, you'll find quite an improvement! There will have to be a fan with the condenser too, for the times you are not moving at speed. Can be a manually controlled fan, with a switch at the dashboard.

saintsinner · 8th October 2009, 01:38

Quote:

Originally Posted by silver_shadow

someone told me about a little fan that you can fit on the roof between the passenger seats and driver seat which will channel some of the AC air towards the back. supposedly it's quite effective. instead of looking at roof mounted ACs which will cost almost as much as the car and add to it's instability you might want to try the fan which is alot cheaper!

well, a few years back i used to travel in BPO cabs a lot. they were either tavera, sumo or a qualis.

I have seen two type of these AC's -

one kind are the two little boxes that have a cylindrical fan in them that circulate the cool air towards the rear, very effective for the price i would say..

The other ones i have seen are just like the one in the safari, they fit very neatly, chill like crazy and they have their own condenser pipes and everything. i presume the have another compressor as well as these things cost around 25-30K

6th October 2009, 10:28	#1
reddy6980 BHPian Join Date: Sep 2005 Location: bangalore Posts: 155 Thanked: 56 Times	Rooftop A/c's I have seen many rooftop a/c's in vehicles like Force traveler. Now the question, do these A/c's run on compressors connected to the engine or do they run on batteries. What is the cost of such a/c's.
	() Thanks

6th October 2009, 11:02	#2
gigy Senior - BHPian Join Date: Jul 2006 Location: mumbai Posts: 1,321 Thanked: 47 Times	Even i am looking for information on such thing for omni.
	() Thanks

6th October 2009, 23:32	#3
silver_shadow BHPian Join Date: Apr 2008 Location: Bangalore Posts: 366 Thanked: 3 Times	all vehicle ACs work off the engine AFAIK.
	() Thanks

7th October 2009, 08:50	#5
honda3938 BHPian Join Date: Aug 2009 Location: patiala Posts: 125 Thanked: 0 Times View My Garage	The roof mounted blower has cooling coils and blower . The cooling coils are connected to the compressor and blower to battery . The are similar to in dash ac but are roof mounted to give better cooling at rear.
	() Thanks

7th October 2009, 09:08	#6
amitk26 Senior - BHPian Join Date: Jul 2008 Location: Bangalore Posts: 2,089 Thanked: 716 Times	Guys he is not asking about roof mounted coils and blower as in Tata Safari , In commercial vehicles like AC Buses and Tempo traveler full AC unit including compressor is mounted either in rear or on roof top ( in case of traveler) As far as I know a separate engine is used to drive this Auxillary AC unit and it is not driven from Vehicle engine as the AC load for a bus / mini bus would be huge on the main engine. Driving using battery is also futile because battery is actually charged by Alternator which again means same load on engine + Conversion losses Usually on traveler these AC are of Carrier make but I have no idea about the cost.
	() Thanks

7th October 2009, 09:34	#8
reddy6980 BHPian Join Date: Sep 2005 Location: bangalore Posts: 155 Thanked: 56 Times	In Force site they have mentioned that the AC's used are of Subros make.
	() Thanks

7th October 2009, 14:58	#9
Trust_In_Thrust BHPian Join Date: Nov 2008 Location: New Delhi Posts: 768 Thanked: 350 Times	I asked for a quote for such ac from a company in faridabad. If i remember correctly it was sidwal and the quote i got was around 80,000 Rs .This inlcudes everythin for the ac and installation.And this was the smallest ac they have. Now for what i was looking you guys will not believe , i thought to make the ac of 800 more effective . LOL
	() Thanks

7th October 2009, 15:47	#11
Trust_In_Thrust BHPian Join Date: Nov 2008 Location: New Delhi Posts: 768 Thanked: 350 Times	^ These ac that are mounted on roof top come sin various sizes . I chose the smallest for the M800 but was not cost effective . Now dont' embarrass me again saying you want to install this in M800.I know i was insane. But now i have a new design in mind for the 800. Last edited by Trust_In_Thrust : 7th October 2009 at 15:51.
	() Thanks

7th October 2009, 16:38	#12
Takumi-san BHPian Join Date: Apr 2009 Location: Melbourne Posts: 368 Thanked: 121 Times View My Garage	Ok,I cant let this go. MARUTI 800 MATE ? ARE YOU SERIOUS! hehe, fine I wont push it.
	() Thanks

7th October 2009, 17:49	#13
silver_shadow BHPian Join Date: Apr 2008 Location: Bangalore Posts: 366 Thanked: 3 Times	someone told me about a little fan that you can fit on the roof between the passenger seats and driver seat which will channel some of the AC air towards the back. supposedly it's quite effective. instead of looking at roof mounted ACs which will cost almost as much as the car and add to it's instability you might want to try the fan which is alot cheaper!
	() Thanks