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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 negative with regard to outside the room. Favorable pressure occurs when there is more air being supplied than exhausted, and prevails to minimize the seepage of outside contaminants. Natural ventilation is a key consider minimizing the spread of air-borne illnesses such as tuberculosis, the common cold, influenza and meningitis.

Natural ventilation requires little maintenance and is affordable. An air conditioning system, or a standalone ac system, offers cooling and humidity control for all or part of a structure. Air conditioned structures frequently have sealed windows, due to the fact that open windows would work versus the system intended to preserve consistent indoor air conditions.

The percentage of return air made up of fresh air can generally be controlled by adjusting the opening of this vent. Normal fresh air intake has to do with 10%. [] Cooling and refrigeration are supplied through the removal of heat. Heat can be removed through radiation, convection, or conduction. Refrigeration conduction media such as water, air, ice, and chemicals are described as refrigerants.

It is necessary that the a/c horse power suffices for the area being cooled. Underpowered cooling system will cause power wastage and ineffective use. Sufficient horsepower is required for any ac system set up. The refrigeration cycle uses 4 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 (likewise called metering device) controls the refrigerant liquid to flow at the correct rate. The liquid refrigerant is returned to another heat exchanger where it is enabled to vaporize, thus the heat exchanger is frequently called an evaporating coil or evaporator.

At the same time, heat is taken in from indoors and transferred outdoors, leading to cooling of the structure. In variable climates, the system might include a reversing valve that switches from heating in winter season to cooling in summer season. By reversing the flow of refrigerant, the heatpump refrigeration cycle is changed from cooling to heating or vice versa.

Free cooling systems can have extremely high performances, and are in some cases integrated with seasonal thermal energy storage so that the cold of winter can be utilized for summertime 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 heat pump is added-in since the storage serves as a heat sink when the system remains in cooling (as opposed to charging) mode, triggering the temperature to gradually increase throughout the cooling season. Some systems include an “economizer mode”, which is in some cases called a “free-cooling mode”. When economizing, the control system will open (fully or partly) the outside air damper and close (completely or partly) the return air damper.

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

In both cases, the outside air needs to be less energetic than the return air for the system to go into the economizer mode. Central, “all-air” air-conditioning systems (or package systems) with a combined outside condenser/evaporator system are frequently set up in North American residences, offices, and public buildings, but are tough to retrofit (install in a structure that was not developed to get it) because of the bulky air ducts required.

An option to packaged systems is making use of separate indoor and outside coils in split systems. Split systems are chosen and extensively used around the world except in North America. In The United States and Canada, split systems are frequently seen in domestic applications, however they are gaining popularity in small commercial structures.

The benefits of ductless air conditioning systems consist of easy installation, no ductwork, higher zonal control, versatility of control and quiet operation. [] In area conditioning, the duct losses can account for 30% of energy intake. Using minisplit can lead to energy cost savings in space 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 install inside the ceiling cavity, so that short lengths of duct handle air from the indoor unit to vents or diffusers around the rooms. Split systems are more efficient and the footprint is usually smaller sized than the plan systems.

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