About Commercial Heating and Air Conditioning

Commercial heating and air conditioning is commonly referred to as HVAC systems, which stands for Heating, Ventilation and Air Conditioning systems. These systems are used for maintaining comfortable temperatures and air quality in homes and large buildings. The main purpose is to make the environment healthy and safe in terms of temperature and humidity. The laws of heat transfer, fluid mechanics and thermodynamics are used for designing.

HVAC systems are aimed at improving air quality, providing ventilation and maintaining pressure. Room air distribution methods are employed for delivering air. The ambient conditions and fresh air requirements must be specified whenever designing an HVAC system.

Heating

The heating systems used in HVAC can be any of the several kinds available. In cold areas, central heating is implemented. The system consists of a furnace, boiler and heat pump. Air control is maintained from a central location like a furnace or mechanical room.

Water is used as a medium for transferring heat. Pipes and ducts serve as passage for the heated fluid which is transferred to rooms through radiators. Radiators may be wall mounted or fixed under the floor.

The pump circulates water and ensures an equal supply of heat to all locations. If the weather is warm, the same pipes and ducts are used for cooling. The heating process may also be achieved through resistive heating. An electric current is used for heating conductive filaments.

There are a few considerations which should be kept in mind. Heat pumps are efficient but more expensive. They should be used in moderate climates only. Radiators should be situated near windows or in the colder parts of the building. Harmful gases are formed if the heating system is not working correctly. This is why proper ventilation is a must for every commercial heating and air conditioning system.

Ventilation

Ventilation is classified as mechanical or forced and natural. In the former kind, an air handler is used to control the air quality through dilution of inside air or substituting it with fresh air. Mechanical or forced ventilation is not energy efficient in humid regions.

In these areas, exhausts, direct drive fans are used for controlling air quality and humidity as well. In cold areas, ceiling fans can also be utilized to achieve ventilation. They circulate the warm air in the upper portion through the entire room.

Natural ventilation does not use any mechanical equipment. It ventilates a room with open windows, vents or openings in the wall. It works well only in small areas but is still widely used due to economical prices and no energy consumption.

Air Conditioning

Air conditioning systems remove heat from a room using radiation, convection and even heat pumps. The process is termed as the refrigeration cycle. The systems are designed not only to cool the area but also to ventilate it and control air humidity. Sophisticated designs employ a reversing valve which automatically switches between heating and cooling a room depending on the outside climate.

There are central cooling systems but they can be installed only when a building is being constructed. Retrofitting them in an already built structure is difficult because the ducts are very large. In such cases separate coils for indoors and outdoors can be used. The two units are connected through pipes, providing a passage for the refrigerant.

Dehumidification is important in air conditioning systems. Evaporators or open chiller cabinets are used for the purpose. Basements serve as good locations because water density is higher in the air at lower levels and temperatures. Filtering is also necessary for removing particle sand gases, which can be dangerous. The filtering and condenser coils must be cleaned regularly because the dirt built - up can damage the compressor.

How To Easily Diagnose Heater and AC Problems

Like any machine essential to your daily life, air conditioners require regular, preventative maintenance. If you don't want to prematurely replace your unit, tune-ups and inspections make plenty of sense. If these small tasks go ignored you could find yourself with a failing air conditioner. Keeping in mind the average lifespan of an AC unit is around 15 years, it's especially important to keep a close eye on older systems. With the winter months fast approaching, it's time to make sure that your AC and heating system is in top shape to keep your home comfortable inside when it gets cold outside. Scheduling a fall tune-up will help check your system for these three major signs that your AC is on its way out.

Over-Running & Noise
I'm putting over-running and strange noises in the same category because you obviously have to listen to notice either sign. If working effectively, your AC should be able to stop running fairly often. If you're serenaded by the non-stop hum of your AC compressor it's time to call a professional. Somewhere, something is going wrong and seriously hindering your home's cooling process. When it comes to strange noises, if you're hearing bangs, clanks or rattles there could be issues with anything ranging from foreign objects to an unbalanced machine. It's best to let a technician determine the source and then get you back on track.

Warm Condenser & Frosted Pipes
Your AC condenser has a copper line and simply touching it can tell you if you need prompt professional assistance. If the condenser line is warm, you have a Freon shortage, Freon leak or are dealing with compressor failure. On the flip side, cold isn't good either. If there is a layer of ice or frost on the pipes connecting your compressor to your home it could mean a Freon leak, a blockage within the pipes or blockage in the main air duct. In the case of frost, switch the Fan setting on your thermostat to ON and the Cool/Heat switch to OFF to begin defrosting those pipes. While this is taking place, call and schedule an appointment as soon as possible to inspect for possible Freon leaks.

Liquid Spray
When a seal gasket blows, spray or splatters of liquid are visible on your AC. The spray is result of a Freon leak that needs immediate attention. Freon is a controlled hazardous substance that can negatively impact the environment by damaging the ozone layer. If your compressor is left to run with low or depleted Freon it can lead to total failure. Before your system fails you'll being paying extra in energy bills. Losing just 10% of your Freon supplies to a leak will cost you up to 20% more in electricity.

Don't wait until it's too late! Stay up-to-date with your AC's regular maintenance. To keep your home warm this winter, make sure that your AC is running smoothly and efficiently and be on the lookout for the three signs of impending system failure.

Personal Air Cooler Benefits

If you're looking for alternate methods to use energy and have cleaner air to breathe, consider the use of evaporative cooling units in lieu of central air or a regular room air conditioning unit. These units, also known as swamp coolers create a cooler environment with many pluses.

A personal air cooler with evaporative cooling technology can cool room temperatures significantly. They can also save you significantly on your electricity bill over usage of a regular refrigeration air conditioning unit. We all know how steep our air conditioning bills can be, especially in hot summer months. These swamp coolers go above and beyond cooling your air. They can also create cleaner healthier environments with features such as air cleaners built right into the cooler unit.

How do personal air coolers work?

It's best to use these devices in areas where there is a low level of humidity as they create humidity. They also use existing hot weather to be converted to cooler temperatures. The cooler blows that cooled air into your room. When searching for an evaporative personal cooler, you will find a multitude of options. There are several considerations to consider when making your choice including the features you want as well as the design of the unit and the amount of floor space it's meant to cool.

Personal air coolers use either direct or indirect evaporative cooling methods. While some evaporative coolers can cool entire buildings or outdoor areas, a personal cooler generally cools a smaller area such as a single room and contains louvers to allow you to direct the flow of air where you wish. One of the benefits of these is that they are generally lightweight and fairly portable. The smaller units don't have significant reservoirs but can provide several hours of cooling for you. You can invest in larger systems to cool an entire building that have higher end components and more power. This, still reduces your electricity bill and results in cleaner air.

What are the other advantages of personal air coolers?

These units are fairly quiet, take up much less energy than a regular air conditioning unit, create cleaner air and are better for the environment. Many hydro companies are now giving rebates to customers who use more energy efficient appliances so it's also worth checking with your local hydro company to find out if a rebate system is in place. This can significantly reduce the cost you'll pay to use this better cooling resource.

Air Conditioning Repair Services to Fix Technical Snags

With the onslaught of summer it is highly recommendable to tune up and repair air conditioner system on regular basis in order to attain optimum cooling and ensure functionality of the same. Slightest of technical default can put a dent in a person's pocket. Periodic maintenance is a must in order to ensure the longevity and functionality of the system. On an average a basic air conditioner consumes 40% of the overall energy consumption visibly accelerating the monthly utility bill. With periodic air conditioning service it is now possible to slash down on the utility bill by half. Duct of an air conditioner system is an important component.

Overtime, the duct gets accumulated with dust, grimes and other form of gunk particles. The dirt particles overtime get amassed and start entering the environment through the filters resulting in wheezing out of dirt particles. Most often than not people end up inhaling the dust particles released from the air conditioner. For people suffering from allergic reaction, the technical default can severely impact their respiratory system. Cleaning and maintaining a regular system can be highly daunting task at best. An ideal option is to seek professional help from credible power duct cleaning services with years of expertise in the same.

Blown compressor, leakage of water, faulty cooling, duct cleaning, rattling noises no matter what, a proper service can get any system up and running in no time at all. There are several leading air conditioning repair services offering high standard quality installation, up gradation and repair services with exceptional customer services at affordable rates. The air conditioning repair contractors repair wide range of system ranging from furnaces, split system, heat pumps, air conditioner etc. For any technical default, the best course of action is to seek consultation from credible cooling contractors proficient in every aspect of heating and ventilation system. The trained technician will meticulously assess the system through series of diagnostic tool and accordingly undertake suitable repair services.

The entire air conditioning repair technician are licensed, bonded and insured. The credible technicians are selected after a series of intensive screening process from background check, drug test, long apprentice chip etc. One prime benefit of hiring insured air conditioning repair services is that any loss accrued during the revamp process will be completely reimbursed to the client. The heating contractors will strive diligently to deliver high standard quality services customized to meet exact specification and unique requirement of client at best prices. The client also retains the option to get price estimates from several leading heating repair services and compare prices in order to get best deals possible. The leading service companies are available 24x7 for the convenience of the client. For any technical default the credible service engineer will reach the appointed destination in short duration of time. The technicians are knowledgeable, skilled, equipped with latest HVAC technology to deliver unsurpassed quality services in low downtime. For any further query or clarification, client can call the 24hr helpline. Online platform is the best source to find reliable and pertinent information on the same.

AC Doesn't Cool While at a Stop - Air Conditioning Blows Warm at Idle

There are several reasons why a cars AC may not cool when at a stop and blows cool only when moving. The most common reason is the cooling fan for the condenser is not working. It's important to know that many times the cooling fan is shared by the radiator and condenser, other times there are TWO separate ones. The reason why a bad cooling fan can affect the AC so drastically is the fact that heat from refrigerant (Freon) is normally cooled when passing through the condenser. So even if the condenser fan is NOT working, it may not affect the AC while the car is moving at highway speeds. This is because air is passed through the condenser when driving down the road so the fan is not needed. When the car is at a stop, the condenser is totally dependent on the cooling fan to cool it down. Sometimes the cooling fan may be working, but it may be moving too slowly to sufficiently cool the condenser. To check the motor, a test light can be used to verify that it is getting power and ground to the electrical plug in. If power and ground is present and the motor is not working, the motor has an open circuit. When the cooling fan motor is worn, it may be started sometimes temporarily by lightly tapping on the electric fan motor with a small hammer or wrench. If the fan turns at all when this is done, replacing the motor will be necessary. This is just another way to verify that it is receiving the power it needs to operate. Also keep in mind that a cooling fan may start at any time (some even come on with the engine off) so be careful not to stick your hand in the way of the blades! Note that if the cooling fan motor has seized, it's likely that the fuse has blown also. So if there's no power to the fan and the motor is locked up, a fuse will more than likely need to be replaced at the time of the fan motor replacement.

Other Causes of Car AC Not to Cool at an Idle or a Stop   

1. The car could be overheating - caused by something else other than the cooling fan.


2. Heat transfer from the radiator to the condenser can alter efficiency, if the car is overheating.


3. The AC compressor may not be pumping sufficiently at slower RPM's (revolutions per minute).


4. An expansion valve may not be regulating the refrigerant correctly.


5. Condenser fins could be bent or the condenser could be obstructed by foreign debris.

There are special condenser fin combs to straighten condenser fins. But in my experience, bent condenser fins are not that much of a common problem. A more common problem if you drive in the country, is pollen accumulated over time in between the fins. Trash from the road like a plastic bag or piece of paper obstructing part of the condenser reducing performance can happen anywhere. It's funny to me that during my time as an auto technician, many customers came in concerned that the AC wasn't cooling, but failed to notice that the car was overheating - even if the temperature gauge was pegged!

Things to Know About Gas Furnaces

With the different types of furnaces available today, choosing which to purchase can be a daunting task. One of the most popular types of furnace these days is the gas furnace. Highly regarded for the low cost of operation and efficiency, manufacturers have churned out quite a number of gas furnaces models boasting one feature to another. But don't take their word for it; investigate before buying.

Natural gas, one of the cheapest fuels, is used to fire up most of the gas furnace in the market. That's one good reason why people opt to purchase this type of equipment. Furnaces live up to more than 20 years of service; imagine the accumulated expenses you'll incur in operating a gas furnace compared to an electric type, for example.

All furnaces require a certain level of maintenance. Some will require a monthly clean up of filters, etc. A gas furnace may require such regular care, but it may not require such a big attention that an oil furnace requires. Oil furnaces accumulate soot, which blocks filters and other passages and thus require an intensive annual maintenance.

Of course, to keep the equipment in tip-top shape, gas furnaces also require special attention. Aside from cleaning the filters, the motor must be cleaned and oiled. You will also need to have a qualified service technician to check on pipe leaks, circuit boards, ventilation systems, et al. Failure to provide the proper maintenance to your system may result in unforeseen problems, including the shortening of its lifespan.

Modern furnaces are compliant to the Annual Fuel Utilization Efficiency rating set by DOE. This rating system ensures that all equipment in the market is at least a 78% rating. The rating measures how efficient a furnace is in converting fuel to heat; the higher the rating, the more fuel-efficient the equipment. It's good to take note of this rating, but don't rely on this alone. If you live in a smaller house, you may opt to purchase one that just meets the requirement. But consider getting a furnace that has a rating of 90% or up if you live in an extremely cold area.

These are just some of the key elements that you should look into when choosing between gas furnaces and other types of equipment. You should also consider installation, warranty and after-sales support when making a comparison. Shopping around will help you get the best deal.

Finding a Heating and Air Conditioning Company That Offers the Best Options

If your heating and air conditioning units are old and are not working as well as you would like, it might be time to find a replacement. It is a good idea to look into it before the whole unit fails, so that you will not be left in any extreme temperatures without assistance. As you look for a company to supply you with the right units, consider the products they sell, the cost for products and installation, and consider the customer service of the company.

The product is an important consideration as you look at a company. If they do not have and cannot order the product you desire then you will have to look elsewhere. As you consider various products, you should make sure to look for energy efficient ones. These will not only save you on your monthly energy bill, but they will also possibly pay you in tax credits.

As you look at various companies, consider the costs that they charge for various products as well as for installation. One company should not have a product for a great deal more than another. The installation cost should be minimal if not free, and there should be a warranty on both the product as well as the service. Something else to look for is a company that includes free servicing of the product for at least a few years.

Customer service is also important. It might actually be the most important part of finding a company to provide you with the right heating and air conditioning service. Having good customer service can mean a variety of things. It means giving a few freebies here and there. Always putting you as the customer first is a sign of good service. It can also go into when a technician comes to your home. He should be careful to leave your home as good as or better than he found it. This aspect of choosing a heating and air conditioning company is very important.

After you look for these traits in a company, you hopefully will have what you are looking for. Of course no business will be perfect, but in order for it to work for you, it should have what you are looking for. Do not settle for less unless you absolutely have no other way to find heating and air conditioning units. There is, however, almost always some way to get things done the way you would like if you search hard enough.