How Do Air Conditioners Work?

Air Conditioning Units

Air-conditioning has been used in many factories but people did not really know about this invention until the 1920s when hundreds of department stores, movie theaters, and restaurants installed these devices.

People simply came to these places to get relief from the hot and muggy air outside.  Central air-conditioning systems were developed in the 1930s and after World War II, hundreds of small units sold quickly and were often used in many private homes.

Contrary to popular belief, an air-conditioning unit does not add coolness to the air.  In fact, the opposite is true.  It removes heat.

How Air-conditioning Works?

An air conditioner works on the same principle as a refrigerator, but it is different in a sense that it is not designed to produce extremely low temperatures.  The surrounding heat is taken from the air by the rapid expansion of a cooling substance (called a refrigerant) as it turns from a liquid at high pressure to a gas at low pressure.


A small air conditioner built for home functions this way: first, we have coils and pipes containing refrigerant gas which flows outward.  This refrigerant enters the compressor pump as a warm, low-pressure gas and leaves as hot, high-pressure gas.  Next, the outdoor air takes up heat from the refrigerant in the condenser coil.  In this coil, the compressed refrigerant gas uses heat from the outside air and becomes a warm liquid.  The warmed refrigerant passes through tiny openings of the valves, expands and turns partly into a gas at low temperature.  When it reaches the evaporator coil, the newly-cooled refrigerant takes up the heat from the indoor air.  The indoor air gives up

The warmed refrigerant passes through tiny openings of the valves, expands and turns partly into a gas at low temperature.  When it reaches the evaporator coil, the newly-cooled refrigerant takes up the heat from the indoor air.  The indoor air gives up heat to the refrigerant in the cooling coil and also loses moisture as it is chilled.  The moisture then condenses on the coil and trickles down to the outside drain hole.

Office Buildings

In large installations, such as in office buildings and schools where there is central air-conditioning, a machine chills water that is distributed to a series of coils.  The air from the building is drawn over of those coils and is then circulated to every room by blowers.  The air travels through filters to coolers to the ducts and into the rooms.  After circulating, the cool filtered air comes out of vents in the ceilings and returns to the air conditioner through the openings near the floors.

To be practical, today’s modern air-conditioning units have been designed to maintain a steady temperature, otherwise, we would have to turn the unit off and on continually as the temperature rose or fell.  This self-adjusting feature is made possible by a temperature regulating device built into the unit called a thermostat.  The thermostat is set at the desired temperature when the air-conditioning unit is turned on and then switches the cooling unit on and off when needed.

So yeah, that’s how it works

Scientists predict that the air-conditioning systems of the future will work with what is known as thermoelectricity.  A thermoelectric unit is extremely small and very quiet.  It is made up of tiny pairs of semiconductors that are connected in parallel to an electric current.  These pairs produce cooling and heating effects on opposite ends at the same time when a direct current flows through them.  This is called the Peltier effect.  If the current is reversed, the cooling and heating functions are also reversed.  Thermoelectricity will be able to cool and heat your entire house very cheaply in the future.

Why is There Moisture in the Air Conditioner?

This question is a very common question in the Dallas Air Conditioning business.  The term air conditioning is used instead of the term air cooling because the air conditioning system does two things:  first, it cools the air and then second, removes the moisture from the air.

AC MoistureHave you ever experienced a warm, muggy, sticky day in Dallas?  It can be miserable because the air is holding a lot of water or moisture.

This condition is called humidity.  Early cooling systems did not account for the moisture in the air and thus did not do as good a job as for today’s air conditioners.

Air conditioner Vs Humidity

In Texas today, the modern air conditioner has an evaporator coil inside your house that blows air over the ice cold coils and cools your air.  When the air hits the ice cold coils, any moisture in the air attaches to the condensate coils and then runs down the surface to a collector pan.  The pan has a PVC pipe connected to it and runs the water outside or into your sewer system.

If you have ever had an ice cold drink served to you outside on a humid day you know what I am talking about.  You see, the moisture quickly forms on the outside of the glass and runs down to the napkin.  You can substitute the coil for your glass and the pan for your napkin and you have the exact same thing.  Without removing the water from the air inside your home, mold can grow, wallpaper can peel and you will sweat a lot more.  That’s a big bummer!

Units manufactured by Trane, Ruud, Lennox, Bryant, Carrier or Rheem all operate on the same principle.  Our trained technicians at Dallas Heating and Air Conditioning know how to handle problems with leaking or dripping air conditioning units in all Dallas area.

Gas Water Heater Vs. Electric Water Heater

You have an old gas water heater and it is time to replace it with a new one but, you don’t know whether to replace for another gas or an electric one, do you? What to do before you make such a decision?

Why compare one vs. another?

water heater boxIn today’s world, people are frequently talking about saving energy, especially at home. And when referring to home energy savings, people will remember the basics such as turning the lights off when not in use and buying appliances that promote the highest energy efficiency level.

Although these two steps are good, it usually is as far as we all go in attempting to save energy. One of the most important energy saving equipment found inside every home is the water heater. The boiler is overlooked by most homeowners almost 90% of the time.

In fact, not only gas water heater but electric ones are responsible for about 25% of home energy consumption, so, why not think about saving energy with the water heater?

This article will concentrate about the pros and cons of a gas water heater Vs an electric one, what you should know about each one of them before making your decision.

Gas Water Heater:

Most gas water heaters that are available in today’s market runs out of natural gas, however, if you live in the country, it is most likely that your water heater is an electric or a propane gas one.

gas water heaterGas water heater is considered one of the most energy-efficient available in the market today, especially, if compared with an electric one.

Gas heaters are more efficient to heat the water due to the burner power in the bottom of the tank.

Most gas water heaters run at 80% to 90% efficiency, which means, no matter what is done with the installation and ventilation, the electric heater will lose about 10% to 20% of energy. Gas heaters are much better for a large family, due to their quick recovery rate.

The average fuel cost for gas water heater per therm is $0.50 or $136 per year, if it is $0.60 per therm, that the yearly cost would be $163, if the price per therm $0.70, the yearly cost then would be $190.

Electric Water Heater:

electric water heaterElectric water heaters run at 220v which means that if the home is not upgraded with the proper electric wire and power box, this means that the homeowner will have to make an investment to upgrade the home electricity, which might cost several hundreds of dollars or, even over a thousand.

Electric water heaters need electric wires rated to run the water heater. It also needs to be properly venting the carbon monoxide from inside the home to the outside. Electric heaters run usually at 100% efficiency, but, the tank doesn’t keep hot water for too long and, the recovery rate is usually slower than the gas heaters. Especially, there’re more than 4 people in the house.

If a family of 5 or more people, the electric water heater is not a good option. The average cost of electricity of an electric water heater is $0.08 per kilowatt-hour, so the yearly cost would be $390, if the price per kilowatt-hour is $0.10 then, the yearly cost will be $488 but, if the price per kilowatt- hour is $0.12, the yearly cost will be $585.

Natural Gas Price

Per Therm Yearly Cost




Propane Price

Per Gallon Yearly Cost




Electricity Price

Kilowatt-hour Yearly Cost





When comparing a gas to an electric water heater, it is evident that a natural gas water heater will be the best option to have in the home; however, such a choice will only make sense, if the home already has the proper electrical or gas connections ready for it.

So, the best way to go is to first check the home to see what kind of installation that is already there, there, consult the Dallas water heater professionals, a certified electrician and a certified plumber in gas to provide you with a bid for either of the necessary upgrade, then, see what makes sense to you.

Also, visualize your saving not only in the present time but, at as well as, on the long run and, with the one that will save you money the most and will provide the most benefit.

Disclaims: Remember, this is an informational page only, you are responsible for your decisions, and this site is in no way responsible for your decision.

Unclog Your Drain & Clean Your Dishwasher

How to Unclog Your Sink

How to Unclog Your Drain without Chemicals?
It might be the fact that your bath tub or sink is draining slowly. Perhaps you’re one individual who likes to make use of harsh chemical cleaners for fixing your toilet and kitchen clogs. Although this can solve your problems temporarily, it will be prudent to avoid using chemical substances because they can cause more harm than good.

There is a possibility for your eyes and skin to get damaged not to mention the surroundings. Below we have mentioned a couple of effective ways that will help to unclog your drains without using any chemical substances whatsoever.

1. Dish Soap and Hot Water
A successful way to unclog the kitchen drain will be to use hot water and dish soap. In fact, this method is going to be very effective in case the clog is caused because of grease. Adequate quantity of soap has to be squirted down the blocked drain and you also need to pour some boiling water. This method should be effective in fixing any greasy clogs in the drain. However, this process ought to be implemented at least once every week.
2. Vinegar and Baking Soda
While vinegar happens to be an acid, baking soda is actually a base. A chemical reaction is going to take place when these two ingredients are mixed together which will be able to eat through the clogs.

Follow the subsequent steps for unclogging your drain:

This process is definitely not at all difficult. If you do not get the desired results on the first occasion, try to repeat the process for a second time which should solve your problems successfully.
a. Make sure to get rid of any debris from the opening of the drain.
b. 1 cup of dry baking soda must be poured down the drain.
c. Next, pour half cup of vinegar and use a rag to cover immediately.
d. Leave it like that for half an hour and make some boiling water at the same time.
e. After removing the plug, pour the warm water slowly down the drain.

How Do I Clean a Dishwasher?
Every dishwasher has got a filter at its bottom which often traps the food particles and we also often ignore the rubber seals as well as the flatware basket not to mention the front door panel. It is imperative to clean these on a regular basis so that your dishwasher does not emit any filthy smell and also functions properly. 

Here we will mention some surefire ways that will help to clean your dishwasher successfully:
1. The filters need to be cleaned after every single use. Make it a point to clean the spray arms using washing-up liquid and then water has to be run through the inlet of every single spray arm so that the holes do not get clogged by food particles.
2. For eliminating any filthy odor emitting from the dishwasher, prior to running a load make sure to sprinkle 2 teaspoons of bicarbonate of soda at the base of the device.
3. Also, you will be able to avoid any buildup of soap scum and lime scale by running some white vinegar occasionally through the device.
Otherwise, you may also make use of a top priority dishwasher cleaner.