Posts tagged central air conditioning

Cooling Without Central Air Conditioning

attic fanWhen it comes to cooling your home or office in the summer heat or other times of year, depending upon how close you live to the equator, many would insist on the presence of a central HVAC system in order to get the job done.  However, we are here to tell you that you really don’t need that at all.  Is it nice and chill?  Yes.  Is it a requirement to beat the heat?  No.  On behalf of your Cooling Sales and Service in St Louis near Overland MO, we did some hunting and pecking online to decide some of the best, most effective ways to cool your space without central air conditioning.

Fans may be one of the keys.  “Whole-house fans may seem old fashioned, but they’re enjoying renewed popularity. The idea behind them is simple: A powerful fan draws cooler early morning and evening air through open doors and windows and forces it up through the attic and out the roof vents. This sends hot air up and out, cooling your house and your attic.”  Typically these attic fans (as they have been called in the past) are mounted in an upstairs stairwell or hallway ceiling where there’s at least 3 ft. of clearance above the fan itself, according to your St Louis Cooling maintenance near Overland.

What are the advantages to a fan that works to cool your entire house in St Louis?  Well, for starters, you will save a lot of money in energy savings.  You will use approximately 90 percent less energy with a fan than you will with an air conditioner.  When you live in a dryer climate, it is not uncommon for an attic, or whole-house fan to replace an air conditioner entirely, according to the information we gathered in our research on behalf of your Cooling Sales and Service in St Louis near Overland.  We have other cooling ideas to share and plan to do so in the next two posts that follow.

Cooling Options in St Louis

central coolingIn the quest to cool your space, you will have many different AC units from which to choose in your cooling selection, according to the recent research we have been doing on behalf of your St Louis Cooling install near Kirkwood MO.  The different options are as follows: Central air conditioning, Ductless mini splits, Geothermal, Window units, Portable air conditioners, Evaporative (swamp) coolers and Packaged terminal air conditioners (PTAC).

Interestingly enough, it isn’t as if only one solution will work for one setting as there are many different types of air conditioners that will work for many types of homes and business and commercial spaces. Which air conditioner you choose for your family or company is dependent on the area or space to cool, budget, eco-friendly options as well as energy efficiency…these are typically all considering factors in your selection and we will look at some of the common factors to consider in the following list below, from your St Louis Cooling Installation near Kirkwood MO.

You will want to determine how much space you are trying to cool in your home or commercial environment.  You will need to look at the climate outside in order to best choose your St Louis Cooling near Kirkwood, you will want to look at the home structure.  Central air conditioning is obviously the most popular cooling unit for home or businesses.  “Two thirds of homes in the United States have central air conditioning. When selecting a Central Air Conditioning option, you want to consider the space to cool in the home. Central air conditioning is going to cool the home or business through ducts.  Central air conditioning systems use ducts to distribute cooled air throughout your home or business.  It will cool the entire space, not isolated to one room, like other types of air conditioners.”

AC Systems – Basics of Load Calculation

commercial air cooling system in MOAmerican Services Cooling installation and repair in Saint Louis knows that the first step in A/C System design is to select indoor and outdoor summer and winter design conditions. Today, computer programs have been designed to provide very precise load determinations but an understanding of the process is required for anyone looking at a new system.

Computation of the peak cooling load. Heat gain is composed of or influenced by the conduction heat gain through opaque portions of the building’s skin; the conduction plus solar radiation through windows and skylights; the building internal loads such as people, lights, equipment, motors, appliances, and devices; and outdoor air load from infiltration. The heat gain is equal to the cooling load required.

Ventilation rates must also be considered in A/C cooling system design. Ventilation rates have typical values and fit into the equations. For example, bedrooms have a typical ventilation rate of 30 cubic feet per minute per room compared dressing rooms of only .5 cubic feet per minute per square foot.
Central air conditioning cooling systems are typically used where several spaces with uniform loads will be served by a single unit and where precision control of the rooms are required. Cooling coils can be direct expansions or chilled water. Within this type of a system there are multiple options for condensers, cooling towers, and ground-loop systems based on the specific application for the location.

Unitary air conditioning systems are typically limited to loads less than 100 tons. These systems are packed in self-contained or split configurations. Again depending on the specifics of your application each option will have benefits and drawbacks.

Cooling Systems – Basics of Load Calculation

commercial air conditioning in MOAmerican Services cooling installation near University City knows that the first step in A/C System design is to select indoor and outdoor summer and winter design conditions. Today, computer programs have been designed to provide very precise load determinations but an understanding of the process is required for anyone looking at a new system.

Computation of the peak cooling load. Heat gain is composed of or influenced by the conduction heat gain through opaque portions of the building’s skin; the conduction plus solar radiation through windows and skylights; the building internal loads such as people, lights, equipment, motors, appliances, and devices; and outdoor air load from infiltration. The heat gain is equal to the cooling load required.

Ventilation rates must also be considered in A/C cooling system design. Ventilation rates have typical values and fit into the equations. For example, bedrooms have a typical ventilation rate of 30 cubic feet per minute per room compared dressing rooms of only .5 cubic feet per minute per square foot.
Central air conditioning cooling systems are typically used where several spaces with uniform loads will be served by a single unit and where precision control of the rooms are required. Cooling coils can be direct expansions or chilled water. Within this type of a system there are multiple options for condensers, cooling towers, and ground-loop systems based on the specific application for the location.

Unitary air conditioning systems are typically limited to loads less than 100 tons. These systems are packed in self-contained or split configurations. Again depending on the specifics of your application each option will have benefits and drawbacks.

Evaporative Cooling; How it Works

cooling repair in MissouriAmerican Services heating and cooling installation in Edwardsville knows that evaporative cooling uses evaporated water to naturally and efficiently (energy) cool the environment. Modern technology has produced two types of evaporative coolers, direct and indirect. Direct evaporative coolers, better known as swamp coolers, operate by cooling outdoor air by passing it over water saturated padding, causing the water to evaporate into the padding. The 15-40degree Fahrenheit cooler air is then directed into the building and pushes warmer air out through windows. When direct evaporative cooling systems are used in commercial buildings they are most often roof mounted.

When operating a direct evaporative cooler, windows or vents must remain open part way
to allow warm air to escape outside, being replaced by cooled air. Unlike central air conditioning circulating the same air; evaporative coolers provide a steady stream of fresh air into the building.

Indirect evaporative coolers have a heat exchanger that prevents humidity from entering the building. Efficiency tends to be lower than that of the swamp coolers mentioned above.

Another type of evaporative cooling for commercial buildings is night sky radiant cooling. This approach works best in climates with large diurnal temperature swings, such as in the Southwestern United States.

The process begins when water is sprayed on to a low slope roof surface at night then cooled through a combination of evaporation and radiation. The water then drains to a tank in the basement or is circulated through tubing embedded in a concrete floor deck. Cooling is accomplished during daylight hours by either recycling the water that was routed to the basement tank the night before, or circulating cool water thru tubing located in the concrete floor slab.

Cooling Commercial Buildings

cooling repair in MissouriAir quality is the two most important words a contractor in the cooling systems installation industry must adhere to. The workplace today must be conducive to good health. Environments with poor air quality can result in health risk and costly medical bills, or additional cost if lawsuits are filed.

Contractors therefore must commit to keep commercial buildings as cool and comfortable as possible. The size of your building installation will determine which option will be suitable for your project.

Air Conditional Units

There are many types of air conditional units available for installation today. Window air conditioners are one such choice. For the most part they are easy to install and it doesn’t require much skill to do so. The next unit, the split air conditioning unit is suitable for an average or medium sized office, and requires at least a basic set of technical skills and installation experience. For larger and more complex commercial installations, a central air conditioning system must be installed. This complex unit has many technical features and requires a certified technician; maintenance of this complex system also requires experienced technicians.

Recently there has been a shift in technology centered on improving existing cooling systems. One example is compressor technology. Evaporative cooling, ice storage and chiller sequencing characterize much of the technology being used today.

With an eye turned toward air pollution in the work environment, the contractor must ensure that the appropriate air conditional units are properly installed maintained and calibrated. By doing so the contractor lessens the chance for possible lawsuits due to employee health problems associated with defective installation.

The contractor must remember most indoor environments contain 5 times the pollution rate as discovered outside.  In order to avoid any legal suits based on creating an unsafe work environment or defective installation practices, good contractors such as American Services Heating and Cooling systems installation in Edwardsville  think green and installs the proper commercial cooling systems.