Once you have chosen a good energy efficient air conditioning unit, you will need to have it properly sized. When it comes to central air conditioning, bigger is not always better. A unit that is too large or too small will lose cooling efficiency. Your certified HVAC contractor should perform a load calculation and help you select the right sized unit for your home.
My home is 2, sq. What size unit do I need? Read so many mixed consumer reviews that I am confused. Price is a concern, I am a senior on fixed income.
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Can you recommend any particular brand? Thank You. A contractor that does good work and stands behind their work and product is better than any brand. Thanks for your recommendation about getting the best deal by replacing the complete HVAC system. I recently moved into a house with a faulty heating system that I plan on replacing this fall. Hopefully replacing the entire system will help me save money.
Your email address will not be published. By using this form you agree with the storage and handling of your data by this website. Leave this field empty. Spread the Love. Replace Both the Air Conditioner and the Furnace? Buying a New HVAC System If you are going to the expense of replacing the central air conditioning unit, it pays to replace the furnace at the same time to maximize the efficiency of the air conditioner. M Lancaster on March 21, at pm. Callie Marie on April 8, at pm.
Know it's a genuine "system" with several independent components and functions that work together to produce an effect. This works with an evaporator to make up the system that helps cool your home in the warm months. It's most often powered by electricity. A furnace that warms and circulates the air in your home. Furnaces are powered by many different sources such as electricity, solar, or geothermal, but most often they are powered by natural gas.
Ducting that serves as a highway for the conditioned air to travel to your rooms. Ducting is normally made of stamped sheet metal, but expansion and contraction can cause leaks to form. Some contractors will install flexible ducting that won't wear out so easily. A thermostat that controls when the system turns on and off.
Thermostats can be manual, programmable, and some work wirelessly so you can control them remotely from your smartphone.
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There are other components of an HVAC system that may or may not be present in a standard installation. These features are: A germicidal UV light : This feature sterilizes the air, purifying to a level often found in hospitals. While it's comfortable to breathe clean air, for those with conditions or compromised immune systems, it can be a very important part of their HVAC system.
A central humidifier : This helps maintain the level of humidity in the air in your home. This keeps the air from being too dry or too humid and cuts down on static electricity. It can also help people with respiratory conditions such as COPD or chronic asthma. An energy recovery ventilator : This component helps improve the air inside your home by swapping it out with fresh air from the outside. During the winter months when houses are closed up to keep out the cold, the air inside becomes a handy way for colds and flu to infect an entire family.
By circulating outside air inside, the health of your family will have a better chance. An electronic air cleaner : This additional filtration helps keep pollen and other allergens from getting into your system and circulating throughout the house. See how much it costs to install a whole house air purifier or cleaner.
If you have built additions onto your house, you may find your old system no longer meets the requirements for the new dimensions. Perhaps a new technological breakthrough has provided features that will improve your comfort and air quality.
Most often, however, you need to replace your system because it no longer works properly. Repairing your system is sometimes more cost-effective than replacing it. The two areas that see the most common repairs are the electrical components and the piping components.
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HVAC Replacement Cost The price of an entire system replacement includes the cost of the new unit, installation, and removal and disposal. This accounts for leakage in ducting and less than perfect insulation. It also accounts for people entering and leaving your home throughout the day. Remember that the BTU number only reflects the amount of energy it will take for your system to raise or lower 1 pound of water by 1 degree Fahrenheit. It does not reflect the actual amount of heating or cooling going into your house. Other factors that can affect what size unit you should get include: Foundation type Type of roof Color of the roof Insulation values Windows type, location, and number Exterior doors What temperature you want to maintain Where you live Size of the house Which way the house is facing Construction materials used when the house was built Landscaping that can affect how much sun or wind hits the house These factors are included in a "Manual J" calculation.
Contractors who make these calculations before recommending a size can take a couple of hours collecting the information and making the calculation. If you're feeling particularly on the ball, there are also free online calculators. You should also consider various upgrades to your HVAC system. Variable Speed Fan - A standard motor has two speeds: "on" and "off".
A variable speed fan can save energy by blowing more slowly to maintain temperatures, going up to full speed only when it must. A properly running system will maintain humidity, but you may be more comfortable or have medical conditions that require higher or lower humidity levels than your standard HVAC system can provide.
Whole-house Zoning - With this option, you can control the temperature for each room. By zoning, you can have your heating and cooling system shut off the conditioning in rooms that don't need it while focusing on rooms that do. UV Lights - UV lights are useful for controlling germs. A UV light sanitizes the air from germs and mold spores just like the systems used in hospitals. Ventilation - A ventilation system takes a more active role in removing stale air from your home. It pumps old air out and brings new air in.
Over time they can weaken. As they weaken, they cause the motor to run hotter.
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This can shorten the life expectancy of your motor. Once a capacitor fails, the whole motor will stop working.
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You usually won't notice that a capacitor has weakened until your motor stops turning on. Compressors are outdoor components in your system. The compressor is the pump that circulates the refrigerants through the air-conditioner. You can hear it when it's running so you'll know if it's working just by listening.
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If it starts getting louder, your compressor is about to fail. If it makes no sound when it should be on, it has already failed. Compressors fail for a number of reasons. Most often they fail due to strain from another failed part such as the fan motor. Electrical storms can also damage compressors. If the sound from the compressor gets louder or if you see a decrease in performance, you should have your compressor checked.
A failed compressor will not heat or cool your house. They manage everything from the power going to the motor to automatic dampers, humidifiers, etc. Most of them are controlled by the thermostat. The most common failure for a relay is being stuck in the "open" position.
Separated from its assigned contact point, it fails to complete the connection and send the message to whatever it was supposed to operate. This failure usually occurs from use over time. Each time a relay connects and sends its signal, the electrical arcing from point to point eventually causes wear and tear.
Furnace Circuit Boards control a variety of functions. It not only handles the regular operation of the furnace, it also monitors the furnace's various safety circuits. Over time, vibrations from the furnace can weaken solder point and cause them to separate.
Dirt and debris can cause short-circuits that damage the board. Failure of the circuit board can cause a variety of effects ranging from the fan not turning on to the complete shutdown of the furnace. Fuses often fail. They can burn out over time, may just be loose, or can blow out during an electrical storm or due to overload from another failed component.
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