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Riley Heating & Air Conditioning

1019 Knowles Rd, Phenix City, AL 36869, United States

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+1 334-298-1278

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Mon-Sun, 8am – 9pm

Space pressure can be either positive or negative with respect to outside the space. Favorable pressure occurs when there is more air being supplied than exhausted, and prevails to reduce the seepage of outside pollutants. Natural ventilation is an essential element in minimizing the spread of airborne illnesses such as tuberculosis, the typical cold, influenza and meningitis.

Natural ventilation needs little upkeep and is economical. An air conditioning system, or a standalone air conditioner, supplies cooling and humidity control for all or part of a building. Air conditioned structures typically have sealed windows, due to the fact that open windows would work versus the system meant to preserve continuous indoor air conditions.

The percentage of return air comprised of fresh air can usually be manipulated by adjusting the opening of this vent. Typical fresh air consumption is about 10%. [] Cooling and refrigeration are provided through the elimination of heat. Heat can be gotten rid of through radiation, convection, or conduction. Refrigeration conduction media such as water, air, ice, and chemicals are referred to as refrigerants.

It is vital that the air conditioning horsepower suffices for the location being cooled. Underpowered cooling system will cause power wastage and inefficient usage. Sufficient horsepower is needed for any air conditioning unit set up. The refrigeration cycle utilizes 4 necessary aspects to cool. The system refrigerant begins its cycle in a gaseous state.

From there it enters a heat exchanger (often called a condensing coil or condenser) where it loses energy (heat) to the outside, cools, and condenses into its liquid stage. An (also called metering gadget) manages the refrigerant liquid to stream at the proper rate. The liquid refrigerant is gone back to another heat exchanger where it is enabled to evaporate, hence the heat exchanger is typically called an evaporating coil or evaporator.

In the process, heat is taken in from indoors and transferred outdoors, resulting in cooling of the building. In variable environments, the system may include a reversing valve that changes from heating in winter season to cooling in summer season. By reversing the circulation of refrigerant, the heatpump refrigeration cycle is altered from cooling to heating or vice versa.

Free cooling systems can have extremely high effectiveness, and are in some cases combined with seasonal thermal energy storage so that the cold of winter season can be used for summer air conditioning. Typical storage mediums are deep aquifers or a natural underground rock mass accessed through a cluster of small-diameter, heat-exchanger-equipped boreholes.

The heatpump is added-in since the storage acts as a heat sink when the system is in cooling (as opposed to charging) mode, triggering the temperature to gradually increase during the cooling season. Some systems consist of an “economizer mode”, which is in some cases called a “free-cooling mode”. When economizing, the control system will open (completely or partly) the outdoors air damper and close (totally or partially) the return air damper.

When the outdoors air is cooler than the demanded cool air, this will permit the demand to be satisfied without utilizing the mechanical supply of cooling (typically cooled water or a direct growth “DX” system), hence conserving energy. The control system can compare the temperature level of the outdoors air vs.

In both cases, the outdoors air should be less energetic than the return air for the system to enter the economizer mode. Central, “all-air” air-conditioning systems (or plan systems) with a combined outside condenser/evaporator system are typically installed in North American houses, workplaces, and public buildings, but are challenging to retrofit (install in a building that was not designed to receive it) because of the bulky air ducts required.

An option to packaged systems is using separate indoor and outside coils in split systems. Split systems are chosen and widely used worldwide other than in North America. In The United States and Canada, divided systems are frequently seen in property applications, but they are acquiring appeal in small business structures.

The advantages of ductless a/c systems consist of simple installation, no ductwork, greater zonal control, flexibility of control and peaceful operation. [] In area conditioning, the duct losses can account for 30% of energy consumption. Using minisplit can lead to energy cost savings in area conditioning as there are no losses connected with ducting.

Indoor units with directional vents mount onto walls, suspended from ceilings, or fit into the ceiling. Other indoor systems mount inside the ceiling cavity, so that brief lengths of duct manage air from the indoor system to vents or diffusers around the spaces. Split systems are more efficient and the footprint is normally smaller sized than the plan systems.

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