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One Thermostat Control for your House

One Thermostat Control for your House

It is impractical to have separate thermostats and other equipment in each office for individual comfort control. That is why you only have one thermostat in your home. That one thermostat controls the temperature for every room in your house. The area or rooms that are controlled by a single thermostat is referred to as a “zone”. If you only have one furnace at home, you only have one thermostat and therefore you only have one “zone”. In an office building There will be several zones per floor. In each zone a thermostat controls the temperature in several offices. It operates a zone box, usually a “VAV” (variable air volume) box. In our model we are going to use a VAV box to illustrate how the thermostat controls the office temperature of your Air Conditioning system.
Thermostad

A VAV box has a damper inside that is operated by an actuator controlled by the thermostat. This damper meters the amount of cool (50 – 55 degrees) air delivered to the office. The position of the damper that meters the proper amount of air to the office is determined by the thermostat. The thermostat detects the temperature of the air in the office. If the temperature is higher than the set point (the temperature you have the thermostat set for), then the thermostat causes the damper in the VAV box to open enough to allow more cool air to enter the office to absorb the additional heat that caused the temperature to rise. The temperature is then lowered. If the temperature goes below the set point, the flow of air is reduced by the damper. The reduced volume of air permits the heat load in the office to build up causing the temperature to rise. Obviously these changes are very subtle. The thermostat is always trying to reach an equilibrium or balance between the temperature in the room and the set point. When this balance is reached, the damper does not move until the thermostat detects a change in temperature.
There are many elements in place working together to maintain a comfortable temperature in a space. This is necessary to make certain the proper volume of air is always available for the VAV box to do the job the thermostat asks it to do. This includes maintaining a constant static pressure in the supply duct serving the VAV box.
Static Pressure is a term you hear frequently and do not have a clue to what it is. It must be bad or it must be good depending on the context in which it is used. Engineers use the term like everyone knows what it is. Static pressure is very important because without it we could never get the air where we want it.
It helps to think of air as a fluid just like water is a fluid. Air is a gas and water is a liquid, but they are both fluids.

The principals applied to a fan or blower is pretty much the same as the principals applied to a pump. They both move a fluid and they both put that fluid under pressure. If the nozzle on your garden hose is turned off, you feel the hose swell a little and get more rigid. This is because the pressure in the hose is pressing against the sides or walls of the hose even though it is not flowing. If you had a gauge in the hose you could see how much pressure is in the hose. The same thing applies to the air in the ducts. It is called static pressure, and now you know. This pressure is what gets the air through the duct (hose) and out the diffuse (nozzle). I am sure you have been in the shower and someone flushes a toilet, starts a dishwasher or turns on a faucet and suddenly the shower water gets very hot. You yell, curse a little and adjust the hot water. About then they turn off the faucet or the toilet tank finishes filling and your shower gets very cold. This is because of variations in the flow in the cold water side of your shower. More or less gallons per minute are being used causing the pressure to change. The same thing will happen in a VAV (variable air volume) system. Think of a VAV zone box that controls the temperature in an office as a valve that opens and closes more or less to supply the required amount of flow to satisfy conditions.

As discussed above, on a mild day the offices are satisfied easily and the thermostats throttle down the VAV air flow. This could cause the static pressure to increase (remember the hose when you turned off the nozzle). If it is a hot day, the VAV boxes may fully open to get all the air flow to the offices that they can. This could cause the static pressure to drop drastically effecting the ability to maintain the needed flow to satisfy the offices. Obviously Static pressure regulation is needed and becomes very important. Static pressure must be maintained during the peak flow demand (cooling) yet be controlled at the same level during low air flow demand (heating) otherwise high static pressure could seriously damage duct work, VAV boxes and other components. High static pressure also drastically increases the cost of operating the fan system.
There are several ways to control static pressure through all air flow demand ranges. The most common method is with vanes or dampers on the inlet of the fan or blower itself. The Static Pressure is monitored by a sensor (a kind of gauge) mounted at some strategic place in the duct system. The signal from the sensor is transmitted to a controller that responds by modulating (opening or closing at a controlled rate) the vanes or dampers on the fan inlet. As the demand for air flow goes up, the vanes open more to permit more air to be supplied by the fan to keep the static pressure from dropping. If the demand for air flow goes down, the vanes throttle closed to reduce air flow and prevent the static from rising.
The next time you hear an engineer mention static or static pressure, hopefully you will understand and will not be intimidated by the term.
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Search Marketing Tools, SEO


How to Choose the Best SEO Software

Search Marketing Tools, SEO

Trying to choose the best SEO software for your business is like trying to select tile for your bathroom. You have to understand your size requirements, what material you want to work with, how much space you have to fill, how easy it is to install and use, your available resources, and what features you want that will bring a smile to your face for years to come. If you have done any research at all, you already know that there are literally hundreds of SEO software solutions, all claiming to be the best. So, how do you choose the best SEO software that is right for you? Consider these 5 criteria when weighing your options.SEO

SEO Software Features

When you choose the best SEO software for you, your business, and your website, it should include all of the features that you need to help you make smarter decisions faster. After all, the sole purpose of adding SEO software in the first place is to make your life easier. Critical features like search engine submissions, competitor analysis, channel analysis, keyword ranking data, on-site content and technical monitoring and suggestions and a lot more should be at the forefront of your decision. If a particular SEO software solution does not have everything you need, or conversely, has more than you need, then look for that perfect fit. Paying for items you do not need, or paying for software that does not improve your knowledge of how your website performs, benefits no one.How Easy It Is To UseIf you are anything like me, you are probably not an expert when it comes to coding your website, and dissecting complicated software solutions to work to your advantage. Who has the time for that? You certainly do not. When you choose the best SEO software for your company’s needs, look for a solution that matches your skill level. The user interface and the system itself should be simple and easy to use, even for beginners. Processes and procedures should not be too confusing to use. If you are going to use SEO software to your advantage, then simplified data that you can take action on faster is what you need.Reporting Functionality the Meets Your NeedsYou are busy, right? You need an SEO software package that is easy to use and offers information in an easy to digest format. If you are going to stay ahead of the curve with regard to SEO, you don’t want to spend a lot of time analyzing spreadsheets, but rather taking specific action to actually move the needle. After all, reports do not directly improve your search results, but the information uncovered that you improve on your website does. Make sure the reports are simple, actionable, and customizable to your specific business needs.

Initial and Ongoing Training and Support

No matter if you are a beginner in the world of SEO, or a more advanced optimization expert, the software you use to analyze data and take action on can make all the difference between faster results and no results at all. You want to choose the best SEO software that offers initial setup support, as well as ongoing training and support that you can rely on at every step on the road to success.Consistent and Regular UpdatesThe landscape of SEO changes quite frequently. As such, so should the software you use to monitor your SEO. It should consistently and regularly update its software platform to stay up to date on search engine changes. One minute you could be focusing on getting as many back links as you can and then Google or Bing devalues quantified back links as part of their algorithm. Your software should update to both tell you a change has occurred as well as help you refocus your energy toward a more meaningful task. When choosing the best SEO software for your business, strongly consider how often your intended solution is updated.

Considering the above factors as you choose the best SEO software, you should be able to identify which solution is best suited for your needs. If you commit to a software package and it does not match your expectation, get rid of it and try another. With so many options, there is definitely the right one out there tailor made for you and your business. Remember that with the best SEO software at your immediate reach, you can achieve page one results sooner than expected! Find more information about local seo here:

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AC Repair Texas


Air Conditioning Repair in Texas

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Having trouble with your AC unit? Instead of ignoring the cooling problem or troubleshooting it on your own, it’s best to have the unit checked and fixed by a reliable air conditioning repair company in town. When you live in Texas, there are several repair services that you can choose from. But first, you need to have a general idea of what’s wrong with your air conditioning system, whether it’s mechanical or electrical, or identify what your repair needs are. Once you do, it’s appropriate to set time for research. Air Conditioning Repair
Searching for a good repair company in the city isn’t something that you can just do in an instant as there are hundreds of them. Competition is tough and you need to search through the mass and find efficient ones to get the best repair experience. You can use plenty of resources out there such as looking at your local community listings or your manufacturer’s referral list. You can also try asking for recommendations from your family, friends or someone who might know decent ones. For sure, any reputable air conditioning repair companies in Texas will have their quality service known and passed on through feedback and word-of-mouth suggestions. For more convenience, you can try searching for one on the web. It can give you greater results and reports than you can imagine.

Use the Internet to find a AC Repair Contractor

Use your favorite search engine and hit enter when you key in the Texas Air Conditioning repair company. You can select from these top repair providers such as Texas Services Air Conditioning, AC Express, 3V Mechanical Service and so on. When you have your list, you can choose to contact or visit them to help you assess if their services fit you. Basically, having an informed mind over which repair company to use is more productive than blind selection. Air conditioners play a big role in our lives. They provide comfort during hot seasons and warm weathers. They keep temperature at normal levels through their cooling process. Humidity can be controlled by cooling down the air and maintains the quality of air in the surroundings. Air conditioners produce less noise and help sustain a peaceful and relaxed environment at home. Your units have health benefits as well. Since all the doors and windows are kept closed, they re-circulate purified air by trapping dust particles, smoke, unwanted odors and allergy causing mites in their filter system. They keep the air in the environment clean and fresh-smelling. We should always remember that air conditioners need the necessary care and maintenance to be able to continue functioning well. For us to reap the benefits of our units, we need to call a professional repair service to make the adjustments and mending that our air conditioner may require.

Some people may think that they can handle the repairs but in reality, they might be causing more harm than good by doing it themselves. For complicated repair jobs, a highly-trained professional is needed. Without the necessary care and maintenance, your unit may be prone to more breakdowns. Expert air conditioner repair service can pinpoint the problem easily and can replace the small parts of your unit. They know what to look for and what to do when complicated problems arise. When you hire professionals, you can be sure that they know what they are doing. You have the assurance that they can keep your air conditioning system working efficiently.
When handling complicated equipment like your air conditioners, it is best that you call the experts. They know the ins and outs of your unit thoroughly and can give you advice on how to maintain your AC units for longer life and use.
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