Does use of the air conditioner decrease mileage?
Yes, fuel consumption will increase with use of your AC system. Your serp belt is only turning a free-wheeling pulley on the front of your AC compressor. When you request AC, an electric clutch behind the AC pulley engages, then your serp belt is turning a demanding compressor. This excess load will actually drop engine RPM briefly at an idle or while cruising. Your vehicle control system will respond by raising the idle to compensate. It is this compensated idle and engine load that brings you back to the gas pumps on the hottest days.
While use of the AC does increase energy consumption, running the AC at freeway speeds is more efficient than opening the windows for cool air. The increased drag caused by open windows uses more fuel than the AC. Around town, however, the AC is less efficient than rolling down the windows.
To reply to the answer about fuel mileage being better at highway speeds vs. rolling down the windows, this is only true in some cases. If you have a small enough engine, running the A/C at highway speeds can have a worse affect on mileage than opening the windows.
Up for debate--Will lower fuel mileage, but if you take into consideration the increased wind resistance created by having windows open--probably a wash Up for debate--Will lower fuel mileage, but if you take into consideration the increased wind resistance created by having windows open--probably a wash You will use more gas when your air conditioner is running.
Is it more economical to run a 110v window air conditioner at night than to keep using your 220v air conditioner?
If you raise your cars air conditioner to a higher temperature will you use less gas than if you keep it cooler?
No, you can not use your air conditioner if the fan outside is not working. Simply because, the heat picked from your indoor air has to be rejected out side, if the out side fan is not working the rate of heat rejection will be very minimal, and as a result the indoor unit can not take any more heat, as a result, the air conditioner will not be cooling after few minutes. Moosa Kutty…
Yes you can put ice in front of your air conditioner. And as a matter of fact, for each ton of ice that you use up, you will have gotten a ton of cooling done. This is the origin of the term "Ton" as it is applied to cooling. A ton of cooling is 12,000 btuh. So if you use up a ton of ice per hour, it will give you the same cooling effect…
For automobiles there are many but the two major ones are R-12 and R134a.. For the home there are various types of air conditioners like window air conditioner, split air conditioner, packaged air conditioner and central air conditioning system..... Most home systems use R-22 refrigerant but R-410a is also an increasingly used refrigerant known as PURON...................
Ideally you should not use an air-conditioner at all. Air-conditioners are a large consumer of electricity and and push "peak load" in electricity networks driving the demand for more electricity generation. A well designed "passive solar" house should not require the use of air-conditioners for maintaining comfortable internal summer temperatures