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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 unfavorable with respect to outside the space. Positive pressure occurs when there is more air being supplied than tired, and prevails to decrease the seepage of outside pollutants. Natural ventilation is an essential aspect in decreasing the spread of airborne health problems such as tuberculosis, the acute rhinitis, influenza and meningitis.

Natural ventilation requires little upkeep and is affordable. An air conditioning system, or a standalone air conditioning unit, offers cooling and humidity control for all or part of a building. Air conditioned buildings often have sealed windows, because open windows would work against the system meant to maintain continuous indoor air conditions.

The percentage of return air made up of fresh air can typically be manipulated by adjusting the opening of this vent. Common fresh air intake is about 10%. [] Air conditioning and refrigeration are offered through the elimination 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 important that the a/c horse power is adequate for the location being cooled. Underpowered a/c system will lead to power waste and ineffective usage. Adequate horsepower is needed for any air conditioning system set up. The refrigeration cycle utilizes four essential 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) controls the refrigerant liquid to flow at the appropriate rate. The liquid refrigerant is returned to another heat exchanger where it is permitted to vaporize, for this reason the heat exchanger is typically called an evaporating coil or evaporator.

While doing so, heat is taken in from indoors and transferred outdoors, leading to cooling of the structure. In variable environments, the system might include a reversing valve that changes from heating in winter season to cooling in summertime. 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 really high effectiveness, and are in some cases integrated with seasonal thermal energy storage so that the cold of winter can be used for summer season cooling. Common storage mediums are deep aquifers or a natural underground rock mass accessed by means of a cluster of small-diameter, heat-exchanger-equipped boreholes.

The heatpump is added-in because the storage functions as a heat sink when the system remains in cooling (rather than charging) mode, triggering the temperature to gradually increase throughout 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 outdoors air damper and close (completely 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 (generally cooled water or a direct expansion “DX” unit), thus saving energy. The control system can compare the temperature level of the outdoors air vs.

In both cases, the outside 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 package systems) with a combined outside condenser/evaporator system are typically set up in North American residences, offices, and public structures, however are challenging to retrofit (install in a structure that was not created to get it) since of the bulky air ducts needed.

An alternative to packaged systems is making use of different indoor and outside coils in split systems. Split systems are preferred and widely used worldwide except in North America. In North America, divided systems are frequently seen in residential applications, however they are getting popularity in small industrial structures.

The benefits of ductless cooling systems include easy setup, no ductwork, higher zonal control, flexibility of control and peaceful operation. [] In space conditioning, the duct losses can represent 30% of energy usage. Making use of minisplit can lead to energy cost savings in space conditioning as there are no losses associated with ducting.

Indoor systems 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 spaces. Split systems are more efficient and the footprint is generally smaller than the package systems.

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