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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 regard to outside the room. Positive pressure happens when there is more air being supplied than tired, and prevails to minimize the infiltration of outdoors impurities. Natural ventilation is a crucial element in decreasing the spread of airborne illnesses such as tuberculosis, the acute rhinitis, influenza and meningitis.

Natural ventilation requires little maintenance and is low-cost. An a/c system, or a standalone air conditioning 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 against the system planned to keep consistent indoor air conditions.

The percentage of return air made up of fresh air can typically be controlled by changing the opening of this vent. Typical fresh air consumption is about 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 referred to as refrigerants.

It is necessary that the air conditioning horse power suffices for the area being cooled. Underpowered cooling system will result in power wastage and ineffective use. Adequate horse power is needed for any air conditioning unit installed. The refrigeration cycle uses 4 essential elements to cool. The system refrigerant starts its cycle in a gaseous state.

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

At the same time, heat is taken in from inside and moved outdoors, resulting in cooling of the building. In variable climates, the system might consist of a reversing valve that changes from heating in winter to cooling in summer season. By reversing the flow of refrigerant, the heat pump refrigeration cycle is altered from cooling to heating or vice versa.

Free cooling systems can have very high effectiveness, and are often combined with seasonal thermal energy storage so that the cold of winter can be used for summer air conditioning. 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 due to the fact that the storage serves as a heat sink when the system remains in cooling (as opposed to charging) mode, causing the temperature level 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 saving money, the control system will open (totally or partially) the outside air damper and close (fully or partially) the return air damper.

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

In both cases, the outdoors air must 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 frequently set up in North American homes, offices, and public structures, but are hard to retrofit (install in a building that was not designed to get it) since of the bulky air ducts required.

An alternative to packaged systems is using separate indoor and outdoor coils in split systems. Split systems are preferred and commonly used worldwide other than in The United States and Canada. In North America, divided systems are most typically seen in residential applications, however they are acquiring popularity in small industrial structures.

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

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

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