How does the aircon affects the fuel consumption?

**ronskiee** · March 8th, 2014 08:54 PM

Mga fellow tsikoteers, noob question lng po. Paano po ba naapektuhan ng aircon ang fuel consumption? Pag nilakasan po ba ang blower lalakas din ang gas consumption? Pag tinataasan po ba ang thermostat lalakas din ang gas consumption? Please enlighten me guys regarding this matter. Thanks in Advance peeps.

**sirkosero** · March 8th, 2014 09:07 PM

Originally Posted by ronskiee

Mga fellow tsikoteers, noob question lng po. Paano po ba naapektuhan ng aircon ang fuel consumption? Pag nilakasan po ba ang blower lalakas din ang gas consumption? Pag tinataasan po ba ang thermostat lalakas din ang gas consumption? Please enlighten me guys regarding this matter. Thanks in Advance peeps.

basically ithe thermostat activates the compressor. thr.compressor adds engine load. more load = more gas.

the comfort of AC outweighs the additional load imho

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**ronskiee** · March 8th, 2014 09:10 PM

ibig sabihin sir, ung taas ng thermostat lvl at lakas ng blower ay hindi direktang nakakaapekto sa gas consumption? kumbaga inshort, basta umikot ang compressor lalakas sa gas, kahit naka low cool? tama po ba?

**sirkosero** · March 8th, 2014 09:26 PM

minimal effect lang naman. but yes, you get the point.

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**ronskiee** · March 8th, 2014 10:25 PM

Originally Posted by sirkosero

minimal effect lang naman. but yes, you get the point.

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maraming salamat po, naliwanagan na po ako ngaun.. more power tsikoteers sa walang sawang pagtulong sa mga newbie na gaya ko.

**dr. d** · March 8th, 2014 10:39 PM

you can actually feel the power drain when you turn on the aircon. you can feel the engine/car lurch just a little (suddenly slow down a little) if you aren't running fast... in some (older?) cars, you can read a drop of engine rpm..
the energy drain isn't too small.. up to 10% or so, some say... depending on the engine's size..
to compensate for this loss in engine power, there is the automatic idle-up circuit, and there's also your right foot..

**12vdc** · March 8th, 2014 11:32 PM

Everything connected to the crank that is dragging its rotation consumes fuel.

More electrical loads/ Higher current draw = more resistance to alternator's rotational force.

Inclined roads, stop and go traffic, high-speed driving = more rotational force needed to move the flywheel.

Aircon compressor turned on = resistance in the pulleys. The lower the thermostat setting, the more and longer your compressor engages with the crank. The higher, does almost the same when your heater engages in a form of electrical load(heater coil).

**ronskiee** · March 10th, 2014 11:46 AM

Originally Posted by 12vdc

The higher, does almost the same when your heater engages in a form of electrical load(heater coil).

sir pwede po pakiexplain pa ng husto? thanks

**niky** · March 10th, 2014 03:41 PM

Most heaters use engine coolant heat to heat the air. That's why you can slow down overheating by switching the climate control to full heat... pulls heat out of the coolant and into the blower.

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As for AC, it's a bigger drag on smaller engines. Even today, a strong AC system can sap some 15-20 hp out of a small motor. In recent testing on one car, AC use dropped economy from around 22 km/l down to 16-18 km/l.

**b0y37** · March 10th, 2014 04:53 PM

In my 95 1.6 Sentra (105hp), noticeable yung power drain once na nagengage yung compressor.

In our 2.5 diesel Adventure, barely noticeable yung pang engage ng compressor, maliban na lang sa tunog, considering na 73 hp lang. Is this because of the low-end torque of diesels?