How much electricity is my AC unit using when it's on "fan"? September 28, 2008   Subscribe Does my window air conditioner use just as much electricity on the "fan" setting as it does on the "cool" setting?Written Even if you leave AC on it's high consumption compressor will turn on and off automatically. The AC fan may keep running all the time, but it's much lower in consumption.If you do manually turn AC on and off consumption will be quite the same. However running AC for short periods of time below 15 min will decrease efficiency. Probably it's best to let AC handle this on-off automatically.Understand Cycle time of air conditioners – frequently with which ac compressor turns off and on | Bijli BachaoWritten Keeping the temperature constant is most energy efficient in general. However, most window air conditioners have the temperature sensor at the air intake into the unit. Which possibly causes large temperature variations at the place where you are.Probably the best practical solution to keep the temperature at the most comfortable point where you are is the solution that some Frigidaire units have, namely to place the thermometer into the remote control.

That way you can be sure the air temperature near you is constant. ac unit thermostat controlSee my entry "Frigidaire FRA086AT7 8,000 BTU Window-Mounted Compact Air Conditioner with Temperature Sensing Remote" here: http://3tonairconditioner.net/80...air conditioning unit indiaAir conditioning units are expensive devices both to buy and to run. how much does a 3 ton hvac unit costWhen they stop working, that’s also an expensive problem to solve. Even so, if you live in a location with unbearably hot summers, an AC unit is essential. Not everyone has that option, though, but they no longer need it because the Eco-Cooler has been invented. The Eco-Cooler is an air conditioner that requires no electricity to function and is created using waste products.

It sounds too good to be true, but it exists and is in growing use across the country of its origin: Bangladesh, where 70% or residents live in tin huts without power. To make an Eco-Cooler you take a piece of board cut to the size of a window on your house. Then drill holes in the board big enough to push a plastic neck through. Gather some old plastic bottles and cut the bottoms off, then slide the neck of each bottle through the holes and secure them with the cap. Do this until the board is full. Hang the board on the window and watch the temperature inside drop. As the video below explains, the simple design works on the same principle as blowing air out of your mouth. To test this, hold your hand up to your mouth then open your mouth wide and breathe out. The air is warm, right? Now do the same thing but with your mouth closed to typical a blowing position. The air leaving your body is cold, right? The bottles work in the same way: the larger end takes in the warm outside air and the change in pressure as it passes through the neck pumps cooler air into the house.

The change in temperature using an Eco-Cooler is at least 5 degrees Celsius. That may not seem like much, but when you’re living in a tin hut with no power that can reach 45 degrees in summer, it makes all the difference. I think you could improve the cooling further by also creating one of these for over the door as it would be a much larger area than the window. With the abundance of plastic bottles and easy access to pieces of board, this would make for a great weekend project. Anyone fancy giving it a go? It would be a good project to do with your kids, especially if they plan on spending their summers in a hot tree house or garden play shed.About "Ask the Energy Expert" Craig Muccio ran FPL's Conservation Research & Development Program and crunched the numbers to figure out how you can save by managing your energy use. Your questions on energy-related topics can be submitted anytime to our Ask the Energy Expert blog. Just click here to submit your question, and if chosen, it will be answered here

Asked on: August 28, 2014 by Beverly H., Weston Which A/C fan setting costs more, “on” or “auto?” My friend believes the “auto” setting uses more electricity. That’s actually a common, but important question. The on/auto fan switch on your A/C thermostat will affect the price you pay to cool your home. The A/C fan circulates the cooled or heated air throughout your home. Setting the fan switch to “on” will make the A/C fan run continuously, 24 hours a day. Choosing the “auto” setting will cause the fan to shut off with the rest of the cooling system as soon as your desired temperature on your thermostat is reached. Fan “on” costs more Advice from friends can be helpful, but in this case your friend was mistaken to think that the auto setting used more electricity. Let’s assume your air conditioner normally cycles off 30 percent of the time. In this example, turning the fan switch to “on” will make the fan run over 200 extra hours a month.

For a typical size central air conditioner, that would cost you about $8 more each month. Keep in mind, a fan that runs all the time may also wear out sooner. Another reason to keep it on “auto” Setting your A/C fan to auto also helps provide better dehumidification. Have you noticed how moisture from the air condenses on the outside of a cold drink on a humid day? Your A/C unit captures moisture the same way, helping your home feel more comfortable. When the fan cycles off using the auto mode, moisture has a chance to drip from the cold cooling coils into the condensation pan and then drain outside. However, when the fan runs all the time in the “on” setting, less moisture has a chance to drip and drain outside. Instead, some gets blown back into the air again. Some people prefer the feel or sound of the fan running all the time. If that’s you, at least now you know how much that choice will cost you. Learn how to save even moreDuring Florida’s hottest months, we want to remind you that you can save five percent on your monthly cooling costs for each degree you turn your thermostat up.