Central Air Conditioning

The central air conditioning comes from the fact that the system conditions the entire building from one large central location in your home. This central air system cools and dehumidifies the air, then blows the cool air into your duct system and out through the supply air registers located in each room. As with all air conditioning systems the principle remains the same whereby the heat is removed from one area and replaced with chilled dry air and the hot air is expelled, normally to the outside atmosphere. If the open areas like a basement or a attic at your home are limited to conveniently accommodate a central air condition indoor unit, a packaged system or mini split may be a better option. These central air North Las Vegas cooling systems are well suited to homes without attics or basements.

How the central air works starts with the cold side which consists of an expansion valve and a cold coil, and it is usually part of your furnace or some type of air handler. The furnace blows air through an evaporator coil, which cools the air. Then this cool air is routed throughout your home by means of a series of air ducts. A window unit operates on the same principal, the only difference being that both the hot side and the cold side are located within the same housing unit. The compressor is the ‘heart’ of the system. The compressor acts as the pump, causing the refrigerant to flow through the system. Its job is to draw in a low-pressure, low-temperature, refrigerant in a gaseous state and by compressing this gas, raise the pressure and temperature of the refrigerant. This high-pressure, high-temperature gas then flows to the condenser coil.

The condenser coil is a series of piping with a fan that draws outside air across the coil. As the refrigerant passes through the condenser coil and the cooler outside air passes across the coil, the air absorbs heat from the refrigerant which causes the refrigerant to condense from a gas to a liquid state. The high-pressure, high-temperature liquid then reaches the expansion valve. The evaporator coil is a series of piping connected to a furnace or air handler that blows indoor air across it, causing the coil to absorb heat from the air outside. The cooled air is then delivered to the house through ducting. The refrigerant then flows back to the compressor where the cycle starts all over again.

Although the equipment costs more than window air conditioners and needs professional installation, ductless, windowless air conditioners offer some distinct advantages over window units. Because of their design, ductless windowless central air conditioners:

• Allow a better view from and more light to a room
• Preserve the option to open a window for ventilation
• Allow a window to be cleaned on both sides much easier
• Don’t block emergency escape from the window

Central air North Las Vegas conditioning systems are typically combined with the furnace system, if your home has one or use a dedicated air handler if it doesn't, and both use the same electrical system and duct-work.

Central Air Conditioner Maintenance

A central air conditioner is part of your home’s heating and cooling system. A Las Vegas central air conditioner is a closed loop system, and the specific components that make up the central air conditioning portion of your heating and cooling system include a condenser which is placed outside and an evaporator inside the air condition system. The condenser contains a compressor, coils, and fins. Refrigerant pipe is compressed under high pressure and temperature in the compressor and then travels as a heated gas into the coils. It expands into a cool, low-pressure gas as it enters the evaporator, which is located on the supply side of a furnace, within the plenum. After warm air circulates from the return side is filtered, the furnace blower directs air over a cooled evaporator. This air cooled, conditioned air to rooms within your home.

Most central air conditioning systems share the same ductwork and blower as the furnace. That means they also share the same filter. You should check your filter at least three times a year because they can build up a lot of dirt in a quick amount of time. A clogged filter can cause your system to run poorly and increase your utility bills. Families with pets should actually change their filters even more often.

It is best to schedule professional HVAC service before your air condition system might cause problems in the future. Service maintenance on the cooling portion should be done once a year, during the spring. This spring service call should include the following maintenance tasks:

• Make sure that the thermostat is functioning properly
• Inspect the furnace filter if accumulates too much dirt
• Inspect and clean the evaporator and coil
• Inspect and clean the blower motor
• Inspect the condensate drain for blockages
• Inspect and clean the condenser and coils
• Inspect the fan motor and blades for dirt and damage especially the fan bearing
• Inspect all components, wiring, and controls to ensure that they are safe and working properly, 
• Inspect refrigerant piping for leakage, repair any existing leaks, measure and check the balance of refrigerant level (Freon).

Most of these tasks are related to the mechanical operation of a central air conditioning system and it is possible for knowledgeable homeowners with the proper tools to complete such tasks, refrigerant within the system is dangerous to the ozone and as such is federally regulated. A homeowner's responsibilities are somewhat limited in scope. Regular filter replacement is the single most important thing a homeowner can do to help maintain their HVAC system.

When you spend a little time performing a few simple maintenance tasks and schedule yearly service for your HVAC system, you air condition system will remain cool during the hot summer months, save more money, and extends the life span of your air conditioner. Disregarding your unit will result in a shortened lifetime, costly repairs, and higher energy costs due to inefficient operation. Maintain your unit and you will extend its lifetime and keep repair and energy costs low while ensuring your comfort on those hot seasons.

HVAC Systems

Heating, Ventilating, and Air Conditioning (HVAC) equipment perform heating and/or cooling for residential, commercial or industrial buildings. The Las Vegas HVAC system may also be responsible for providing fresh outdoor air to dilute interior airborne contaminants such as odors from occupants, volatile organic compounds (VOC’s) emitted from interior furnishings, chemicals used for cleaning, etc. A properly designed system will provide a comfortable indoor environment year round when properly maintained.

Newer systems today provide many more options, such as variable fan speeds and multiple stages of heating and cooling. Single-stage heating and cooling is popular in colder winter climates and hot and humid areas, respectfully, because the systems are set to provide comfort for the coldest or warmest days of the year. But that also means that a great majority of the time, these heating systems or air conditioners are operating at full capacity when they don’t need to be. That's where a multi-stage system comes in handy and can save you energy and money.

Las Vegas HVAC system can heat or cool individual areas of your home by controlling zone valves or zone dampers inside the vents or ductwork, which selectively block the flow of air. Zoned systems can save you energy and money by only heating or cooling certain areas when you need it. Humidifiers and dehumidfiers can be added as options to heating and cooling systems, and if you live in a very dry or humid climate these upgrades should definitely be on your list. About 50 percent relative humidity is considered optimal for humans.

With these systems you can automatically control the humidity levels in a home as you heat and cool, though this is not available through forced-water heating systems that use boilers. With humidity/dehumidification systems built into your furnace or air conditioning, you cannot control the humidity levels when the system is not on. If desired, you can add separate humidity/dehumification systems that do this.

Heating units can be categorized into furnaces that provide heated air through ductwork, which is a popular type of heating system such as boilers that heat water for steam radiators or forced-water systems with baseboard radiators, electric heat and heat pumps. Furnaces generally use natural gas or propane for fuel, while boilers can use gas or oil.

All-electric furnaces have AFUE ratings of 95 percent to 100 percent, but they are not economical is many parts of the country. You can also consider electric heat pumps to heat or cool parts or all of your home. Some heat pumps can be added onto furnaces as well, to help use less gas or propane.

Radiant floors, or hydronic heating systems, often use piping under a floor. Flexible tubes are filled with water or a glycol solution to heat a concrete or other floor. These can be quite efficient and require either a boiler or heat pump. And they can be retrofitted, if carefully installed beneath wooden floor sheathing. Though radiant systems are much more effective if built into a concrete floor, they will retain the heat and release it slowly.

Uses of Air Conditioning Unit

Air conditioning unit is a necessity, especially for homes with young children or elderly residents. Modern air conditioning unit today carries a variety of different central air conditioning options designed for every budget level and efficiency expectation. This includes units with two-stage compressors and variable speed blowers for the ultimate in comfort and energy savings. Older gas furnaces are usually only 60 percent efficient, which means 40 percent of the consumed fuel is wasted. Modern furnace models are available in efficiencies up to 98.5 percent and feature two-stage burners, a variable speed blower and modulating gas valve technology. Central filtration is a foundational element in an effective indoor air quality (IAQ) strategy. Filters work by trapping pollutants as the air is circulated through the HVAC system. ASHRAE developed the MERV rating method so that homeowners can easily compare the efficiency of different brands and models of filters. In order to trap ultra-fine particles, most IAQ professionals recommend installing a filter.

An air conditioning unit Las Vegas relies on the same principles but the evaporation takes place within a closed loop as a chemical compound is converted from liquid to gas and back to liquid in a continuing cycle. Known as a "refrigerant," the chemical compound easily converts to gas at relatively low temperatures compared to water, for example, which must be extremely hot to convert to gas. Programmable thermostats can save up to 30 percent on annual heating and cooling costs when used properly. User created set points raise or lower the temperature when the building is empty to maximize energy savings. The temperature is adjusted back to the normal setting just before the first occupant arrives home. Advanced smart thermostats eliminate programming requirements completely by automatically adjusting the temperature setting based on the user’s living habits. Infrared garage heating provides exceptional comfort and efficiency. Fuel is converted directly into usable energy since the infrared heating process only affects people and objects. Infrared waves travel through the air with very little loss of energy, which is similar to how the sun heats the earth. A burner box and booster fan heat a series of tubes and the thermal energy is disbursed evenly throughout the room. When installing a gas appliance, always remember to use a licensed, bonded and insured gas piping expert who will pressure test the lines to confirm the integrity of the system.

Sizing is key when it comes to A/C. A contractor will look at your windows, floor space, ceiling height, insulation, local climate, cooling requirements, and other factors to calculate the correct size for your house. Mounted on the wall or ceiling, these provide targeted, zoned cooling when traditional central A/C is expensive or difficult to install. Single-zone mini-splits are available for cooling one room, while multizone systems connect one outdoor unit to several indoor units for cooling larger areas. The indoor units include a fan and evaporator coil in the same cabinet.

An air conditioning unit Las Vegas, no matter what type, makes up half of one of the most complex and important systems in your home. Homeowners should understand the basics of their system, the types of maintenance they can perform on their own, how to spot imminent problems, and when to call in an expert for help.

Central Air Condition Systems

Several different kinds of problems can occur with a central air conditioner system:

• AC not working at all
• AC not cooling well but runs
• Room temperature too hot or too cold
• Water leaks from air conditioner
• Air conditioner makes strange noises
• Air conditioner won’t turn off

Although a qualified air conditioning repair person should handle certain types of central air conditioner repairs, you’ll find methods for handling simple repairs and maintenance yourself.

If the central air conditioner won’t go on automatically when the thermostat signals the need for cooling:

Check the main electrical panel and any secondary circuit panels for a tripped breaker or blown fuse. If you find the problem there, reset the breaker by turning it off and then on or replace the fuse. A Las Vegas central air conditioner typically connects to a dedicated 240-volt circuit. If the breaker continues to trip, suspect a short in the system—in the compressor, capacitor, or the fan motor. Hire an electrician to track down and solve this problem.

Make sure the thermostat is set to COOL and its temperature setting is at least 3 degrees below the ambient room temperature. Make sure the power is on. Check the switch in the furnace or air handler, and the outdoor condenser. Also make sure no one has shut off the compressor’s 240-volt disconnect, typically in a metal box mounted near the compressor.

Remove the thermostat’s cover after turning off the power to the air conditioner. Make sure all wires securely attach to their terminals and that the cover won’t pinch them. Replace the cover and wait 3 or 4 minutes, and then try the system again.

If that doesn’t do the job, open the thermostat and unscrew the wire from the Y terminal. Turn the power back on. Holding the wire by its insulation only, touch the bare end to the R terminal and hold it there for about two minutes. If the compressor kicks on, the thermostat is faulty; replace it. If the compressor doesn’t go on when you hold the Y wire to the R terminal, turn the power back off and either call an air-conditioning technician or check the capacitor.

Check the compressor’s capacitor and wires. The capacitor in the compressor starts both the condenser and the fan. If the capacitor has failed, the central air conditioner unit will not run. It’s very easy to test whether it works and it is cheap and easy to fix if it doesn’t.

Central air conditioner systems consist of two major components: a condensing unit that sits outside your house, and the evaporator coil (often referred to as an A-coil) that sits in the plenum of your furnace or air handler. The refrigerant in the A-coil picks up the heat from your home and moves it to the outdoor condensing unit. The condensing unit fan blows outside air through the condensing coil to remove the heat. The condensing unit houses the three parts replaceable by: the contactor, the start/run capacitor(s) and the condenser fan motor. The condensing unit also houses the compressor, but only a pro can replace that. The A-coil has no parts that can be serviced.

Annual Las Vegas central air conditioner maintenance saves you money by increasing its efficiency and preventing breakdowns.

Air Conditioners

The basic concept is that a chemical called a refrigerant loops from inside the home to outside and back again, absorbing and casting out heat in the process. The refrigerant cools and then re-enters the home, starting the cycle anew. two refrigerants commonly used in residential Las Vegas air conditioner are R-22 and the newer R-410A, both of which are chemically known as hydro chlorofluorocarbons (HCFCs).

These chemicals go back and forth from a liquid to a gaseous state very easily, and it is these so-called phase transitions that make HCFCs so useful as refrigerants. Removing heat is not all that an air conditioner does as it, ahem, conditions the air. Humidity the amount of water vapor in the air is a major factor in how our bodies feel the heat; a more humid environment prevents sweat from evaporating off the skin, which helps to whisk away unwanted bodily warmth.

A common phase transition we've all seen is when liquid water is heated and evaporates into a gas, or water vapor. The same goes for the refrigerant: it absorbs heat in its liquid state, transforming into a gas. The refrigerant is then forced to return to being a liquid, expelling the heat it absorbed and thus made ready to soak up heat once again. The vaporized refrigerant then passes into the compressor, which is located outside in the air conditioning unit adjacent to a home (or often on the roof of a business), along with the condenser. As the name implies, the compressor compresses the gas to a state of higher pressure and higher temperature.

From there, the hot, pressurized gas flows over the third component, the condenser. Here, the gas is condensed back into its liquid state as heat is radiated away. Outdoor units often have metal fins on them to help dissipate the heat more quickly.

The cooled-off liquid is now returned into the home. The expansion device regulates the flow of liquid refrigerant into the evaporator, where just as before it will absorb heat and change phase from a liquid into a low-pressure gas.

The air conditioner sucks air into the ducts through a vent. This air is used to cool gas in the evaporator, and as the heat is removed from the air, it’s cooled. Ducts then blow air back into the house.

This process continues until the inside air of your home or business reaches the desired temperature. When the thermostat senses that the interior temperature is at the desired level, it shuts the air conditioner off. When the room heats up again, the thermostat turns the Las Vegas air conditioner back on until the preferred ambient temperature is achieved again.

The best air conditioner is the one you don’t have to think about.  It comes on the moment the indoor temperature set on the thermostat requires cooling performance, and then runs quietly and efficiently when needed.  But when it’s time to perform routine maintenance, make repairs or replace your system, it’s helpful to understand how an air conditioning system works.

Heater Pumps

A heat pump is an air conditioner that contains a valve that lets it switch between "air conditioner" and "heater." When the valve is switched one way, the heat pump acts like an air conditioner, and when it is switched the other way it reverses the flow of the liquid inside the heat pump and acts like a heater. There are four basic processes in the refrigeration cycle. All are important; the expansion valve is where the magic happens.

Whether you're using it for a refrigerator, air conditioner, or heat pump, achieving a low temperature is the key, and that's what the expansion valve does for you. The refrigerant is pushed through the expansion valve, and the temperature of the refrigerant drops -- a lot. So, that cold outdoor air is actually the warmer object then, when it comes in contact with the outdoor coil of your heat pump Las Vegas. And, as we know, heat likes to move from warmer objects to cooler objects. Once we get that heat from the air into the refrigerant, it's just a matter of bringing it into the house and then transferring it into your home's air.

Heat pumps are often described as “fridges working in reverse”. Energy in fridges is extracted from the enclosed interior of the fridge, keeping your food cool and using a tiny amount of electrical energy to power a small compressor. This extracted heat is “processed” and ultimately expelled at the back of the fridge via an element.

A heat pump uses an identical principle and strips energy from the atmosphere using the process of gas evaporation. Once compressed by the compressor cycle it is during its condensation phase that high temperature energy is exchanged into your under floor, radiator or hot water system. The diagram below shows the basic cycle.

Ground source heat pumps (sometimes called geothermal heat pumps) use two practical methods for harvesting energy. Air source heat pumps use an external fan unit to draw air across the evaporator unit, it exits at the back of the unit cooler than it entered. Water source heat pumps are so called as they are used in lakes, ponds and streams to harvest energy. “Open loop” and “closed loop” systems are used. Open loop systems can be likened to a hoover sucking up water and using this direct energy to transfer to the evaporator via a plate heat exchanger.

Heat pumps are often described as “fridges working in reverse”. Energy in fridges is extracted from the enclosed interior of the fridge, keeping your food cool and using a tiny amount of electrical energy to power a small compressor. This extracted heat is “processed” and ultimately expelled at the back of the fridge via an element.

A heat pump Las Vegas uses an identical principle and strips energy from the atmosphere using the process of gas evaporation. Once compressed by the compressor cycle it is during its condensation phase that high temperature energy is exchanged into your under floor, radiator or hot water system. The diagram below shows the basic cycle.

Heat pumps can be extremely efficient in their use of energy. But one problem with most heat pumps is that the coils in the outside air collect ice. The heat pump has to melt this ice periodically, so it switches itself back to air conditioner mode to heat up the coils. To avoid pumping cold air into the house in air conditioner mode, the heat pump also lights up burners or electric strip heaters to heat the cold air that the air conditioner is pumping out. Once the ice is melted, the heat pump switches back to heating mode and turns off the burners.