by Ethan K. Roberts

In todays world, most people have invested in one form of an air conditioner or another. We have either window air conditioners in our homes or central air conditioners. They keep us cool in the extreme summer heat without fail; however, have you ever set back and looked at the costs of running an air conditioner?

When compared to the common household fan the amount of electricity required to run an air conditioner is phenomenal.

When using an air conditioner there are many different factors that can directly affect the cost of running it. These factors include the geographical location of your home, where you live and the amount of work the air conditioner has to do greatly influence the cost.

If you live in an area that has mild summers and extremely cold winters, obviously your air conditioner will not have to work as hard. However, if you live in an area, that has warm winters and boiling summers the air conditioner will have to work double time to maintain comfort.

The difference in weather conditions from year to year will affect the costs as well. This is basically geared towards the difference in costs per year. One summer might be cooler than the next, which will lead to a greater bill.

The efficiency rating of your air conditioner plays an important role in the amount of electricity used. Most all appliances in todays world are rated, when you purchase an air conditioner it will have a tag telling you the amount of electricity that appliance uses. Look for air conditioners that use minimal electricity, which will save you money each year. If you have a model that is 10 years or older, it is definitely time to consider a new one.

Another important factor is the size of the air conditioner versus the house-cooling load. All air conditioners come in different sizes, and each will state the amount of space it is designed to cool. For example, an apartment could do with just one or two window air conditioners, while a three-bedroom house could not. Closely consider the amount of space you need to cool when considering an air conditioner. While larger air conditioners will cost more money, it will typically save you money in the long run on usage.
The setting on your thermostat greatly effects the cost. A higher setting will result in the air conditioner running less, while lowering the setting will cause it to run more often. One electric company suggests keeping the thermostat above 25c degrees. This can save you 10 to 20% on cooling costs.

Finally, the local cost of electricity influences the general cost of running your air conditioner. This is something you have no control over, however, you can control your own cost by saving energy.

Here is a general look at the difference of running an air conditioner vs. running a Ceiling or oscillating fan, at medium speed.

Running a central air conditioner that is three ton (and of average efficiency) for 8 hours per day for 15 days per month, with the average rate per kWh (kilowatt per hour) being 0.17, the average cost per month for the air conditioner alone will be $97.92. Amazing isnt it? This does not even include washer, dryer, lights, refrigerator, or stove, only the air conditioner.

On the other hand, running a ceiling fan or oscillating fan at medium speed, for 8 hours per day, for a full 30 days, at an average rate per kWh of 0.035 is only $1.43. With this comparison you could run 68 ½ fans for a full month before you would reach the cost of the central air conditioning unit.

There are many other things you can do to lower you electric bill. Things such as, inspect, clean, or replace your air conditioner filters monthly. When you are not in your home, raise the temperature on your thermostat, keeping in mind pets when you do.

Lower the temperature of your water heater to 50 degrees celsius, wash only full loads in your dishwasher or clothes washer, and use the energy saving cycle on the dryer.

Other steps you can take include, replacing incandescent bulbs with fluorescent lamps, this could save up to 75% on lighting costs. You should also caulk all windows, doors, and pipes to prevent air leaks in or out, use weather stripping around windows, doors and pipes as well. Have your ducts tested for air leaks; leaking ducts can reduce the efficiency of your air conditioner by up to 20%.

Ethan K. Roberts writes on a variety of topics not limited to air conditioners. Also available are more articles on room air conditioners and air conditioner rental.

by Ross MacIver

Looking for a new home entertainment system? Here are five tips for choosing the best model for your home environment.

1. Choose a system that can be expanded. Most of your music collection may be on CDs, but with the growing popularity of DVD audio you don’t want to be left behind. Even if you are only interested in stereo sound make sure you buy a system that can be adapted to new technologies. This includes video as well as audio mediums. Buy a stereo system for now, but make sure it has surround sound capabilities.
Also consider whether you want your home entertainment system accessible in different parts of the house. An expandable system allows you to place speaker systems and playback modules in different rooms so that you can enjoy home entertainment throughout the house.

2. Buy a system with enough power. This goes hand-in-hand with the previous tip. Don’t buy a unit which has just enough power for your current needs, but rather, think about how you will be expand it in the future. Surround sound speaker systems require more power than stereo, and satellite speakers systems installed in other rooms also require extra power.
Dedicated power amps for different parts of your home entertainment system can make a vast difference in the quality of sound. For example, a subwoofer amp can take the load off the rest of your system will providing massively deep bass sounds.

3. Choose a system that matches your entertainment preferences. If you are mainly interested in DVD video a surround sound speaker system can add amazing authenticity to your viewing experience. On the other hand, if you mostly listen to classical music, divide your budget so that you can get a good set of stereo speakers. If you like rap or hip-hop you should choose speakers designed for bass heavy music — a subwoofer is a necessity.

4. Make it backwards compatible. Many people still have a sizable collection of VHS tapes and vinyl records. Rather than throwing out these valuable sources of entertainment, make sure your new entertainment system can handle them.

5. Buy the best you can afford. It’s a waste of money to buy inferior components for your home entertainment system. You will quickly become dissatisfied with them and end up ditching them. If you have a limited budget, divide it up wisely. Rather than starting with a full-featured audio and video home entertainment system, concentrate on a few components. As long as your system is expandable, you can continue adding new features as your budget allows.

Ross MacIver is an audio enthusiast and author of the Audio How To Section of the http://www.selected-audio-reviews.com/

How Plasma TVs And LCD TVs Differ

by Joseph Foley

The buying of large-screen TVs has absolutely skyrocketed lately. It seems that everyone wants one – and with good reason. The large-screen TV has come a long way from those faded-out behemoths of old that took up half your living room and never really produced a picture of decent quality. Now, however, especially in combination with HDTV, you can get not only a nice, large picture, but a crisp, clean one too.
Once you decide that you’re ready for a large-screen TV, you quickly discover that you only really have two main options – a plasma TV or an LCD TV. Plasma TVs were first on the scene, but the recent mass production of LCD TVs by major manufactures has put LCD TVs pretty much on equal footing with plasmas. That said, you will still have to make a choice.

If you’re like most people, you not only have no idea how the two differ, you don’t even know the areas you should be considering in order to determine how they differ. But they do indeed differ, and knowing the difference is extremely important if you’re going to get the TV that’s right for you.
You can essentially boil the differences between plasmas and LCDs into twelve basic points. In some areas, plasmas will win out. In other areas, LCDs will win out. In yet other areas, it will depend on your own personal taste in order to decide who wins out.

The twelve ways plasma TVs and LCD TVs differ are the following:
1. The first is a technical issue, and may seem a little boring, but it really does affect other areas. Plasmas TVs are made of chemical compounds called phosphors. LCD TVs use millions of liquid crystals.
2. The next section is related to how big the TVs are and the availability of larger sizes. You have a wider selection of larger-size TVs with plasmas (though LCDs are catching up).
3. The next section is “small size,” which is also important. Plasmas don’t come in smaller sizes, which you will need for places like the kitchen.
4. Next is viewing angle. Plasmas tend to have a wider viewing angle (though, again, LCDs are catching up).
5. Although the manufacturers may not like to admit it, each “can” suffer from certain problems. Plasmas can suffer from burn-in effect; LCDs don’t.
6. Another problem area, but for LCDs, is “delay.” LCDs can produce a jagged figure when in motion. Plasmas tend to do better. (though LCDs are catching up) HDTV improves this dramatically for both.
7. The next area is life span. You can replace the light source with an LCD, thereby bringing your original picture back. With plasmas you can’t.
8. In the next few sections, the theme of “picture quality” is considered. First, color: LCDs produce sharp, lively colors. Plasmas produce warmer and more accurate colors.
9. Next is brightness levels and the TVs ability to handle different lighting. LCDs tend to do better in bright-light conditions.
10. Also related to picture quality is “black levels.” Plasmas tend to produce blacker blacks.
11. Another area to consider is contrast range. Plasmas, “technically,” produce a higher contrast range.
12. Last, and certainly not least, is price. At the moment, plasmas tend to run a little cheaper, but this is changing rapidly as LCDs flood into the market. By the time you read this, in fact, there may be no difference at all.

Essentially, which one is right for you will all comes down to taste: What potential negatives will you not really notice? What positives do you want more of? What do you really want the TV for – movies, sports, news, regular TV shows? Both plasmas and LCDs have strong advocates in their corners. Both have deliriously happy customers. But those happy customers are only happy because they knew what they wanted before they made their purchase. If you want to make the right choice, you’ll have to decide what it is you want and which of the two TVs can best give you that.

Joseph Foley
Plasma vs. LCD TVs: To learn more about these two technologies and how your own personal tastes and viewing habits will affect your choice, read the full report at http://www.plasma-vs-lcd.com. You might also be surprised to learn that plasma TVs are like peanut butter and LCD TVs are like jelly. Yes, really. Read the report.