MPG Air Con Important question

Mr JP · 5th July 2008, 12:49

As I understand it because the climate control / air con in my type-r uses a percentage of power from the flywheel when on it reduces MPG.

Ok, what I want to know is if it makes a difference what fan speed it's on at? Will it be more economical to have it on fan speed 1 rather than fan speed 4 for instance or once it's on it's on?

also if I have it on LO, is this going to mean less MPG than 19* for instance?

thanks

Steeph · 5th July 2008, 13:06

Quote:

Originally Posted by Mr JP

As I understand it because the climate control / air con in my type-r uses a percentage of power from the flywheel when on it reduces MPG.

Ok, what I want to know is if it makes a difference what fan speed it's on at? Will it be more economical to have it on fan speed 1 rather than fan speed 4 for instance or once it's on it's on?

also if I have it on LO, is this going to mean less MPG than 19* for instance?

The lower the temperatur you set, the lower the MPG because the aircon needs to do more work.
The fanspeed is not related to this, but since it's an electrical thing it needs some power. The faster it's set the more power it uses, but I don't think you'll notice a change in MPG for just for the fan, it's doesn't use that much power.

Mr JP · 5th July 2008, 13:08

thanks steeph, thats a big help, I better turn it up a notch then as I always have it on LO

NH Dan · 5th July 2008, 14:04

Think of your aircon/climate like your fridge indoors.

If you have the fridge set at a really low temp and its 90 degrees outside, then the compressor will have to work much harder to keep it cool, open the door (similar to turning the speed up, the fatser its running, the quicker it needs to heat/cool the air)and it will have to work harder still, using more electricity.

If the fridge is set on mid level and its a reasonable temp surrounding it then the compressor wont have to work anywhere near as hard, therefore using less go juice.

Kremmen · 5th July 2008, 16:51

I don't know whether it's just me, but when travelling at a steady speed say on a motorway on a hot day, I'm sure I can feel the aircon cutting in and slightly sapping the engine power ?

It feels like I've just been hit by a frontal gust of wind. Nothing too severe but noticeable if your paying attention

renbull · 5th July 2008, 17:11

air cons best set at auto , more efficient aswell

gm1980 · 5th July 2008, 17:42

The comfortable region for a human is between 22 to 26 degrees celcius. Therefeore lowering the temperature below that point will make you feel freezed after a long journey and also consumes more power from the engine as ac is more angaged to achieve the set temperature. In my country that the tmeperature in the summer rises up to 40 and mayby more i set the temperature to 26 and in auto mode always. This does the thing and i am quite happy with it. With the ac on and not many highway trips since is a small country I can get around 7.2 l/100 km average. When driving carefully the ac does not make significant difference in MPG in my opinion. When you push hard instead or not driving carefully it does.

cb550 · 5th July 2008, 17:45

Quote:

Originally Posted by Kremmen

I don't know whether it's just me, but when travelling at a steady speed say on a motorway on a hot day, I'm sure I can feel the aircon cutting in and slightly sapping the engine power ?

It feels like I've just been hit by a frontal gust of wind. Nothing too severe but noticeable if your paying attention

Never noticed it in the diesel cars I've had(2 most recent Honda's),but my partner reckons she could tell with her ford petrol.I think petrol's are a little more sensative then diesel's to this

Mr JP · 5th July 2008, 18:11

Is it just me or when the air con is off you can still feel slight cold air coming through vents when recirc is switched off?

Jeroen1000 · 5th July 2008, 19:13

Quote:

Originally Posted by Mr JP

Is it just me or when the air con is off you can still feel slight cold air coming through vents when recirc is switched off?

Jep seems to be normal. You have to lock out the fresh outside air. (there is a button to do this)

5th July 2008, 12:49	#1 (permalink)
Mr JP Magic Rear Seat Join Date: 2nd February 2007 Location: Kent, UK Posts: 618 Thanks: 2 Thanked 23 Times in 23 Posts	Air Con Important question As I understand it because the climate control / air con in my type-r uses a percentage of power from the flywheel when on it reduces MPG. Ok, what I want to know is if it makes a difference what fan speed it's on at? Will it be more economical to have it on fan speed 1 rather than fan speed 4 for instance or once it's on it's on? also if I have it on LO, is this going to mean less MPG than 19* for instance? thanks

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This thread is about: Air Con Important question, it's in Engines and Transmission at the Honda Civic forum Civinfo; As I understand it because the climate control / air con in my type-r uses a percentage of power from the flywheel when on it ...

5th July 2008, 13:08	#3 (permalink)
Mr JP Magic Rear Seat Join Date: 2nd February 2007 Location: Kent, UK Posts: 618 Thanks: 2 Thanked 23 Times in 23 Posts	thanks steeph, thats a big help, I better turn it up a notch then as I always have it on LO

5th July 2008, 14:04	#4 (permalink)
NH Dan Newton Honda Magic Rear Seat Join Date: 31st January 2008 Location: South London,Uk Posts: 921 Thanks: 19 Thanked 23 Times in 23 Posts	Think of your aircon/climate like your fridge indoors. If you have the fridge set at a really low temp and its 90 degrees outside, then the compressor will have to work much harder to keep it cool, open the door (similar to turning the speed up, the fatser its running, the quicker it needs to heat/cool the air)and it will have to work harder still, using more electricity. If the fridge is set on mid level and its a reasonable temp surrounding it then the compressor wont have to work anywhere near as hard, therefore using less go juice.

5th July 2008, 16:51	#5 (permalink)
Kremmen Krem de la Krem Civinfo guru Join Date: 7th January 2007 Location: West London Posts: 2,590 Thanks: 7 Thanked 11 Times in 11 Posts	I don't know whether it's just me, but when travelling at a steady speed say on a motorway on a hot day, I'm sure I can feel the aircon cutting in and slightly sapping the engine power ? It feels like I've just been hit by a frontal gust of wind. Nothing too severe but noticeable if your paying attention

5th July 2008, 17:11	#6 (permalink)
renbull Valve Cap Join Date: 21st March 2008 Location: manchester Posts: 3 Thanks: 0 Thanked 0 Times in 0 Posts	air cons best set at auto , more efficient aswell

5th July 2008, 17:42	#7 (permalink)
gm1980 Locking Wheelnut Join Date: 28th February 2008 Location: Larnaca, Cyprus Posts: 141 Thanks: 0 Thanked 2 Times in 2 Posts	The comfortable region for a human is between 22 to 26 degrees celcius. Therefeore lowering the temperature below that point will make you feel freezed after a long journey and also consumes more power from the engine as ac is more angaged to achieve the set temperature. In my country that the tmeperature in the summer rises up to 40 and mayby more i set the temperature to 26 and in auto mode always. This does the thing and i am quite happy with it. With the ac on and not many highway trips since is a small country I can get around 7.2 l/100 km average. When driving carefully the ac does not make significant difference in MPG in my opinion. When you push hard instead or not driving carefully it does.

5th July 2008, 18:11	#9 (permalink)
Mr JP Magic Rear Seat Join Date: 2nd February 2007 Location: Kent, UK Posts: 618 Thanks: 2 Thanked 23 Times in 23 Posts	Is it just me or when the air con is off you can still feel slight cold air coming through vents when recirc is switched off?