Thursday, April 4, 2013

Split System AC - Duct System Components - (HVAC).


Split System AC. Smoke/Fire Dampers.



Smoke and Fire dampers are found in ductwork, where the duct passes through a firewall or firecurtain. Smoke dampers are automated with the use of a mechanical motor often referred to as an Actuator. A probe connected to the motor is installed in the run of duct, and detects smoke within the duct system which has been extracted from a room, or which is being supplied from the AHU (Air Handling Unit) or elsewhere within the run. Once smoke is detected within the duct, the Actuator triggers the motor release and the smoke damper will automatically close until manually re-opened.


 


You will also find Fire dampers in the same places as smoke dampers, depending on the application of the area after the firewall. Unlike smoke dampers, they are not triggered by any electrical system, which is perfect in the event of an electrical failure where the Smoke dampers would fail to close. Fire dampers may be mounted in either horizontal or vertical configurations. Vertically mounted fire dampers are gravity operated while horizontal fire dampers are spring powered. In either case, a fire damper's most important feature is known as a fusible link. A fusible link is a piece of metal that will fail at a specified temperature allowing the damper to open under gravity or spring power, effectively sealing the duct, containing the fire, and denying it the necessary air to burn.


Split System AC Installation. Plenums.



Plenums are the central distribution and collection units for an HVAC system. The return plenum carries the air from several large return grills (vents) or bell mouths to a central air handler. The supply plenum directs air from the central unit to the rooms which the system is designed to heat or cool.



Split System AC Reviews. Terminal Units.




While single-zone constant air volume systems typically don't have them, other types of air distribution systems often have terminal units in the branch ducts. Usually there is one terminal unit per thermal zone. Some types of terminal units are VAV 'boxes' of either single or dual duct, fan-powered mixing boxes of either parallel or series arrangement, and induction terminal units. Terminal units may also include either, or both, a heating or cooling coil.




Air terminals' are the supply air outlets and 'return' or 'exhaust air inlets'. For supply, diffusers are most common, but grilles, and for very small HVAC systems such as in residences, 'registers' are also used widely. Return or 'exhaust grilles' are used primarily for appearance reasons, but some also incorporate an air filter and are known as 'filter returns'.

Install Split System Air Conditioning Units - Home Humidity!


Install Split System Air Conditioning Units. Humidity = Vaporized Water.



Your home humidity is a measurement of the amount of vaporized water in the air. Humidity levels are naturally higher in warmer climates and lower in cooler climates. The type of home you live in can also affect your humidity measurement. Older and less energy efficient homes are prone to have lower indoor humidity levels, while more modern homes with higher energy efficiency tend to have higher humidity levels.


 


Both high and low home humidity levels can cause problems. Humidity levels that are too high can lead to peeling paint, mold, and wet insulation. Humidity levels that are too low can cause cracks in your drywall, shrink wood floors, and loosen the joints in wood furniture.


 


Generally, people are most comfortable when home humidity is between 20 and 60 percent. It is recommended, however, that you keep your home's humidity level between 30 and 40 percent. This is the ideal humidity level because it balances your need for comfort with the conditions that are least likely to cause structural damage to your house.


Split System Air Conditioning Units Price. Determining Home Humidity.



There are several different strategies you can use for determining home humidity, none of which require the purchase of expensive equipment. Drop three ice cubes into a glass, add water, stir and wait for three minutes; if moisture does not form on the outside of the glass, you may need a humidifier. On the other hand, if you notice frequent fogging of your windows or moisture buildup on closet walls and room ceilings, you may have too much humidity in your home.



Cost to Install Split System Air Conditioner. Basic Changes.



Daily activities such as showering, bathing, doing laundry, and cooking all add water to the air in your home. If the humidity level in your home is too high, you should start cooking with pans covered and open a window for a few minutes to bring in cool air after the meal is complete. Taking shorter showers with cooler water may also be helpful for humidity control. If these basic changes don't help correct the problem, using a dehumidifier is recommended.



Split System AC Reviews. Humidifier.



If your home humidity levels are too low, your skin and hair may feel dry and itchy. The mucous membranes in your mouth and throat may dry out as well, which increases your susceptibility to colds and other illnesses. Purchasing a humidifier for your home is the best way to remedy this problem. Portable humidifiers work by circulating air through a wet pad or a discharging a fine mist into the room. You must add water on a regular basis, but the unit can be moved from room to room as needed.

Carrier Split AC Aircon - Refrigeration and Engineer!


Carrier Split AC Aircon. Certified to Work on Several Different Types of Heating and ventilation!



A refrigeration engineer installs and services refrigeration systems for commercial buildings, delivery trucks, and residences. He or she might specialize by working with industrial-sized refrigerating systems, walk-in coolers, or home units. In addition, many engineers are certified to work on several different types of heating, ventilation, and air conditioning (HVAC) systems. Service engineers can enter the field after completing two-year training programs at vocational schools or community colleges, working as apprentices for up to four years, and passing licensing and certification exams.


Carrier Aircon Air Conditioner. Maintain and Repair HVAC Systems.



Many refrigeration engineers install, maintain, and repair refrigerators and HVAC systems in homes and apartment buildings. Workers typically follow blueprints and instruction manuals to install new systems. They connect air ducts, water and coolant pipes, and electrical wires. When maintenance, repairs, or replacement parts are required, a refrigeration engineer usually troubleshoots a system, dismantles motors or electrical parts, and performs any necessary services.


 


A refrigeration engineer might work on walk-in coolers, air-conditioned delivery trucks, commercial refrigeration units, or large industrial systems. To ensure safety, he or she must have expert knowledge of large scale power supplies and electrical machinery. A service engineer who maintains coolers and delivery trucks is usually required to work very quickly to preserve food or other supplies in cool atmospheres. Engineers often work in teams to install large pipes and air ducts in commercial buildings and industrial facilities.


York Split Air Conditioner. Receive an HVAC Technician Certificate.



To become a refrigeration engineer, a person must typically receive an HVAC technician certificate from a community college or vocational school. Some people, however, are able to obtain refrigeration engineer jobs with a high school diploma and a proven aptitude for mechanical systems. Most new engineers work as assistants or apprentices for about four years, receiving hands-on training from experienced professionals. Individuals may be required to pass licensing exams administered by their state or country, which test their understanding of basic job skills and safety measures.



Trane Split Air Conditioner. Extensive Knowledge of the Mechanical.



An individual who works in a research and development institution might specialize in refrigeration systems engineering. He or she is responsible for designing new or more efficient machinery using computer models and drafting software. Such professionals typically hold advanced engineering degrees and have extensive knowledge of the mechanical, chemical, and electrical properties of HVAC and refrigeration systems.


Mitsubishi Minisplit Senville - The Device Duct Damper!


Mitsubishi Minisplit Senville. Control Temperature and Humidity Levels.



A duct damper is a device used within a heating, ventilation and air conditioning (HVAC) duct. These ducts carry air from furnace or air conditioning units to the different rooms within the building. A duct damper can help control the flow of this air, or can even prevent the air from entering specified areas. By regulating air flow, the duct damper can be used to control temperature and humidity levels, restrict the flow of dangerous fumes or smoke, or simply give homeowners more control over comfort levels and drafts.


 


These dampers can take a number of different forms depending on the desired function. A duct damper may contain a rotating flapper-type mechanism, which will pivot back and forth within the duct to control air flow. It may also contain a louver or vent-type mechanism, which can slow or redirect air flow, but is ineffective at blocking airflow completely. Finally, guillotine dampers are designed to block the entire duct so that air is unable to enter a specific area.


Mitsubishi Mini Split System. Basic Types of Duct Damper Model. 



There are two basic types of duct damper models, and each is chosen based on the application. Volume air dampers control overall air flow as part of the building's heating and cooling system. As the thermostat is adjusted, the dampers automatically activate to increase or decrease air flow. They can also be used to redirect conditioned air out of closed-off rooms, which prevents wasted energy and keeps utility bills in check.



Mitsubishi Mini Split Reviews. Act as a Fire Break Between two Areas.



Fire or smoke dampers are typically used only at fire-rated partitions, or at ceilings and floors that act as a fire break between two areas. They are designed to prevent the spread of smoke or flames through the building's ductwork. Many contain integral smoke detectors that activate the air damper when smoke is present. Others have a fusible link-type element, which melts to shut the damper once temperatures reach a certain level.




Most dampers are also available with a manual operating option. They typically operate using a crank or switch located on the outside of the duct. Users must turn this crank to open or close the damper for both volume control and smoke control. While this option is simple and affordable, it may be impractical in emergency situations, when operators must activate the duct before exiting the building.


 


Mechanical engineers and builders select duct dampers to fit the surrounding ductwork. The damper must have the same shape as the duct, and may be round, square or rectangular. Each damper must fit precisely within the duct to prevent air leaks and ensure the damper will function as intended.

Wednesday, April 3, 2013

Aircon Minisplit AC - What Should I Consider When Buying?


Aircon Minisplit AC. Choice among many.



An air conditioner can be an important addition to the home. Aside from being a summer necessity in some areas, installed air conditioning can be a selling point when a home is on the market. It is important to consider a number of factors when purchasing an air conditioner, as a number of different models and varieties are available.


Mini Split Air Conditioner. Air Conditioning Permanent.




One of the most important steps is to consider the need and matching that to the most effective solution. Is the air conditioning needed for the entire house, or mostly for a single room? Additionally, how often will it be used? If air conditioning is only needed occasionally for a small area, a temporary in-window model might be more appropriate, as it can be removed when not necessary. On the other hand, if permanent air conditioning is needed for the entire home, a larger solution might be needed.



Mini Split Air Conditioning System. Incentives.



With an idea of the type of air conditioner needed, it is important to consider energy costs. Air conditioners can use significant power, and some units are more energy-efficient than others. Comparing models to find one saves energy while still performing effectively can save a significant amount on monthly power bills. Check the labels: most list the capacity of the model in British Thermal Units (BTUs) and give an idea of how energy-efficient the unit is. The more British Thermal Units, the greater the capacity of the unit. Additionally, some utility companies offer cash incentives to customers purchasing energy-friendly appliance replacements. Energy costs can make a huge difference when considering different air conditioners.


Mini Split Air Conditioning Units. Intelligent desicion.




Of course, the price of the unit itself is a consideration as well, and it is important to shop around to get a good deal. However, the price of the unit itself should not be the only consideration. When comparing prices, it is important to factor in the cost of delivery and professional installation, if required. In some areas, product discounts and faster installation may be available in colder months when demand for air conditioners is lower.


 


When properly researched, purchased and installed, shopping for an air conditioner need not be difficult. Air conditioning can make a home more comfortable as well as more appealing to some home buyers. By considering needs and shopping around for a good deal, buyers can make a smart decision.


Panasonic Split Air Conditioner - Building Distribution.


Panasonic Split Air Conditioner. The Heat Pump.



The heat pump is the central unit that becomes the heating and cooling plant for the building. Some models may cover space heating, space cooling, (space heating via conditioned air, hydronic systems and / or radiant heating systems), domestic or pool water preheat (via the desuperheater function), demand hot water, and driveway ice melting all within one appliance with a variety of options with respect to controls, staging and zone control. The heat may be carried to its end use by circulating water or forced air. Almost all types of heat pumps are produced for commercial and residential applications.


Panasonic Split Air Conditioner 1.5 Ton. Liquid-to-air heat pumps.




Also called water-to-air, output forced air, and are most commonly used to replace legacy forced air furnaces and central air conditioning systems. There are variations that allow for split systems, high-velocity systems, and ductless systems. Heat pumps cannot achieve as high of a fluid temperature as a conventional furnace, so they require a higher volume flow rate of air to compensate. When retrofitting a residence, the existing duct work may have to be enlarged to reduce the noise from the higher air flow.



Panasonic Split Air Conditioner Price List. Liquid-to-Water Heat Pump.



Liquid-to-water heat pumps (also called water-to-water) are hydronic systems that use water to carry heating or cooling through the building. Systems such as radiant underfloor heating, baseboard radiators, conventional cast iron radiators would use a liquid-to-water heat pump. These heat pumps are preferred for pool heating or domestic hot water pre-heat. Heat pumps can only heat water to about 122 °F efficiently, whereas a boiler normally reaches 149–203 °F. Legacy radiators designed for these higher temperatures may have to be doubled in numbers when retrofitting a home. A hot water tank will still be needed to raise water temperatures above the heat pump's maximum, but pre-heating will save 25-50% of hot water costs.


Panasonic Split Air Conditioner Specifications. Ground Source Heat Pumps. 




Ground source heat pumps are especially well matched to underfloor heating and baseboard radiator systems which only require warm temperatures 104 °F to work well. Thus they are ideal for open plan offices. Using large surfaces such as floors, as opposed to radiators, distributes the heat more uniformly and allows for a lower water temperature. Wood or carpet floor coverings dampen this effect because the thermal transfer efficiency of these materials is lower than that of masonry floors (tile, concrete). 


 


Underfloor piping, ceiling or wall radiators can also be used for cooling in dry climates, although the temperature of the circulating water must be above the dew point to ensure that atmospheric humidity does not condense on the radiator.


 


Combination heat pumps are available that can produce forced air and circulating water simultaneously and individually. These systems are largely being used for houses that have a combination of air and liquid conditioning needs, for example central air conditioning and pool heating.


 


Lg Split Senville System - The Best Air Conditioning Thermostat.


Lg Split Senville System. Thermostat that you need.



The basic function of an air conditioning thermostat is to turn the cooling unit on and off at a preset temperature. Choosing the best air conditioning thermostat depends largely upon your own individual needs, lifestyle, and energy consciousness. Air conditioning thermostats are available in several different styles from basic manually operated models to multifunction programmable types. A simple manually operated air conditioning thermostat works best if you prefer to keep the indoor air temperature at a constant level at all times. Programmable thermostats are a better choice if you are away from home for several hours each day and want to save energy.


Lg Split System Air Conditioners. Purpose of the Thermostat.



In its simplest form, an air conditioning thermostat is a temperature activated device that automatically controls the operation of the cooling unit. The purpose of this device is to maintain a constant indoor air temperature in a home or building. A manually operated model is usually sufficient for this purpose. Many people prefer to raise the air temperature when the home or building is unoccupied to conserve energy or save on cooling costs.


Lg Commercial Air Conditioners. Configuration.



A manually operated air conditioning thermostat can easily be set to a higher temperature when leaving the home or building each day, but you may find that the air is too warm upon returning. You may also forget to make the necessary temperature adjustment before leaving for the day. A programmable thermostat is usually more suitable than a manual model if you wish to make daily temperature adjustments. It can be set to raise the temperature automatically when you leave and lower it shortly before you return. This function conserves energy during unoccupied times and returns the temperature to a comfortable level when or before you return.


Lg Split System Heat Pump. Warmer Temperature.



In addition to raising the air temperature during unoccupied hours, you may also want to adjust it at night while you sleep. Many programmable thermostats are capable of storing multiple settings for both daytime and nighttime hours. A slightly warmer air temperature can be selected during sleeping hours and automatically lowered again before you awake. Some programmable thermostats can also distinguish between days of the week so that different settings are observed on weekends. These models sometimes allow you to override the regular settings if you come home early or for special occasions such as holidays.