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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

Room pressure can be either positive or unfavorable with respect to outside the room. Positive pressure takes place when there is more air being provided than tired, and is typical to minimize the seepage of outside contaminants. Natural ventilation is a key element in decreasing the spread of air-borne health problems such as tuberculosis, the acute rhinitis, influenza and meningitis.

Natural ventilation requires little maintenance and is inexpensive. An a/c system, or a standalone ac system, offers cooling and humidity control for all or part of a structure. Air conditioned buildings frequently have sealed windows, due to the fact that open windows would work against the system intended to maintain consistent indoor air conditions.

The percentage of return air made up of fresh air can usually be manipulated by changing the opening of this vent. Normal fresh air consumption is about 10%. [] Cooling and refrigeration are offered through the removal of heat. Heat can be eliminated through radiation, convection, or conduction. Refrigeration conduction media such as water, air, ice, and chemicals are described as refrigerants.

It is imperative that the cooling horse power is adequate for the location being cooled. Underpowered air conditioning system will lead to power waste and inefficient usage. Adequate horse power is needed for any air conditioning unit installed. The refrigeration cycle uses 4 necessary elements to cool. The system refrigerant starts its cycle in a gaseous state.

From there it gets in a heat exchanger (in some cases called a condensing coil or condenser) where it loses energy (heat) to the outside, cools, and condenses into its liquid phase. An (likewise called metering device) regulates the refrigerant liquid to stream at the appropriate rate. The liquid refrigerant is returned to another heat exchanger where it is enabled to evaporate, thus the heat exchanger is often called an evaporating coil or evaporator.

At the same time, heat is absorbed from indoors and moved outdoors, resulting in cooling of the structure. In variable environments, the system may include a reversing valve that switches from heating in winter season to cooling in summer. 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 efficiencies, and are in some cases integrated with seasonal thermal energy storage so that the cold of winter can be utilized for summer a/c. Common storage mediums are deep aquifers or a natural underground rock mass accessed via a cluster of small-diameter, heat-exchanger-equipped boreholes.

The heatpump is added-in since the storage functions as a heat sink when the system is in cooling (instead of charging) mode, triggering the temperature to slowly 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 (totally or partly) the outdoors air damper and close (totally or partly) the return air damper.

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

In both cases, the outside air should be less energetic than the return air for the system to go into the economizer mode. Central, “all-air” air-conditioning systems (or bundle systems) with a combined outdoor condenser/evaporator system are often set up in North American homes, workplaces, and public buildings, however are hard to retrofit (install in a building that was not created to get it) due to the fact that of the large air ducts required.

An option to packaged systems is making use of different indoor and outside coils in split systems. Split systems are preferred and widely used worldwide other than in North America. In North America, split systems are most typically seen in property applications, but they are acquiring popularity in little industrial structures.

The advantages of ductless a/c systems include easy installation, no ductwork, greater zonal control, versatility of control and peaceful operation. [] In area conditioning, the duct losses can account for 30% of energy intake. Making use of minisplit can result in energy savings in space 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 unit to vents or diffusers around the rooms. Split systems are more effective and the footprint is usually smaller sized than the package systems.

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