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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 favorable or unfavorable with regard to outside the space. Positive pressure takes place when there is more air being provided than exhausted, and prevails to reduce the infiltration of outside contaminants. Natural ventilation is a key consider reducing the spread of air-borne diseases such as tuberculosis, the typical cold, influenza and meningitis.

Natural ventilation requires little upkeep and is economical. An air conditioning system, or a standalone a/c, offers cooling and humidity control for all or part of a building. Air conditioned buildings frequently have sealed windows, since open windows would work against the system intended to maintain constant indoor air conditions.

The portion of return air comprised of fresh air can generally be controlled by adjusting the opening of this vent. Normal fresh air intake is about 10%. [] Air conditioning and refrigeration are offered through the removal of heat. Heat can be gotten rid of through radiation, convection, or conduction. Refrigeration conduction media such as water, air, ice, and chemicals are described as refrigerants.

It is necessary that the air conditioning horsepower is enough for the location being cooled. Underpowered air conditioning system will result in power wastage and inefficient usage. Sufficient horsepower is needed for any ac system set up. The refrigeration cycle uses four vital aspects to cool. The system refrigerant begins its cycle in a gaseous state.

From there it goes into a heat exchanger (often called a condensing coil or condenser) where it loses energy (heat) to the outside, cools, and condenses into its liquid phase. An (also called metering device) manages the refrigerant liquid to flow at the correct rate. The liquid refrigerant is returned to another heat exchanger where it is permitted to evaporate, hence the heat exchanger is often called an evaporating coil or evaporator.

In the process, heat is taken in from inside and moved outdoors, leading to cooling of the building. In variable climates, the system might include a reversing valve that switches from heating in winter to cooling in summer season. By reversing the circulation of refrigerant, the heat pump refrigeration cycle is altered from cooling to heating or vice versa.

Free cooling systems can have very high performances, and are in some cases combined with seasonal thermal energy storage so that the cold of winter can be utilized for summertime cooling. 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 serves as a heat sink when the system is in cooling (rather than charging) mode, causing the temperature to gradually increase during the cooling season. Some systems consist of an “economizer mode”, which is often called a “free-cooling mode”. When saving money, the control system will open (completely or partly) the outdoors air damper and close (fully or partly) the return air damper.

When the outdoors air is cooler than the required cool air, this will enable the demand to be fulfilled without using the mechanical supply of cooling (generally cooled water or a direct expansion “DX” system), hence conserving energy. The control system can compare the temperature of the outside air vs.

In both cases, the outside air needs to be less energetic than the return air for the system to get in the economizer mode. Central, “all-air” air-conditioning systems (or bundle systems) with a combined outside condenser/evaporator system are typically installed in North American residences, workplaces, and public structures, however are tough to retrofit (install in a building that was not developed to get it) since of the large duct needed.

An alternative to packaged systems is using different indoor and outdoor coils in split systems. Split systems are preferred and widely used around the world other than in The United States and Canada. In North America, divided systems are frequently seen in residential applications, however they are getting appeal in small industrial structures.

The advantages of ductless air conditioning systems include simple installation, no ductwork, greater zonal control, flexibility of control and quiet operation. [] In area conditioning, the duct losses can represent 30% of energy intake. The use of minisplit can lead to energy savings in area conditioning as there are no losses related to ducting.

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

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