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1. Why is it necessary to clean my condensing coil?
Your condensing coil is like the lungs of an air conditioning system.  The more air flowing through the coil the better your system will work.  Every piece of dust or debris can prevent air from flowing through the coil.  An air conditioner works by transferring heat from the inside of your house to the outside.  That’s the condenser's job. In the summer if you feel the air blowing out of the condensing unit it is hot - These are the heat molecules from inside your house.  The more you get out, the cooler your house.

2. What is the best type of filter to use in my system?
This is probably the most asked question, and there's not a precise answer.  When you look at filters there's a good side and a bad side to all of them.  The first thing to take into consideration is the cost. The three most common filters are - your simple cheap $1 filter, the $10 to $20 pleated filter, and the washable electrostatic filter. The best one here is the washable electrostatic filter, though the initial investment is slightly high, usually $50 to a $100, they typically last the life of the unit.  The $10 to $20 filters say they last for three months, based on how much we run our a/c in the summer that just isn't the case.  Therefore in the long run they are the most expensive.  Ok, the next is a big one - airflow.  Now these filters all range in the amount of airflow they let through.  Starting with the cheapest - the most airflow, to the most expensive the least air flow; there’s your trade off.  Now last is the amount of dust the filters get, this also ranges from filter to filter.  The cheapest one gets the least amount of dust, while the electrostatic gets the most.  When choosing a filter base it on these three things, are you more worried about cost, airflow, or dust?  For example I work in the sun all day, I worry more about air flow, because I want the house at 60 degrees when I get home; not really but close. 

3. What is the best type of thermostat?
This is also an answer that is based on personal preference.  The three major types of thermostats are mercury based, digital non programmable, and digital programmable.  If you have a mercury based thermostat these are the round or square ones where you have to move a arm or dial to set, I recommend replacing it with a digital.  Which type of digital depends on you, a programmable t-stat will allow you to set the system to turn on or off at certain times of the day.  This type is a little too complicated for a lot of people (including myself).  Most prefer a digital non programmable.  It works the same way as a mercury based t-stat, yet is very accurate. 

4. What is the best temperature to keep my thermostat set at?
There is no right or wrong answer to this question.  The proper temperature is the one you are most comfortable at, keeping in mind every degree higher or lower could raise your energy bill 3%

How Does Air Conditioning Work - Simple Explanation

Here is a very basic explanation of how your air conditioning system works.

  • Refrigerant runs through a tube into the house and is passed through "coils"
  • Inside air is passed over the coils, and the refrigerant accepts heat.  Taken the heat out of the air makes it cold.
  • The refrigerant then warms up, becomes a gas and moves through the tube back outside the house
  • A fan and the compressor force the heat out of the refrigerant and it condenses back into a liquid.
  • The process starts all over again.


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