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Riley Heating & Air Conditioning

1019 Knowles Rd, Phenix City, AL 36869, United States

Telephone

+1 334-298-1278

Hours

Mon-Sun, 8am – 9pm

Space pressure can be either favorable or unfavorable with respect to outside the space. Positive pressure occurs when there is more air being supplied than tired, and is typical to decrease the seepage of outside impurities. Natural ventilation is a key factor in reducing the spread of airborne diseases such as tuberculosis, the acute rhinitis, influenza and meningitis.

Natural ventilation needs little upkeep and is low-cost. A cooling system, or a standalone air conditioning unit, provides cooling and humidity control for all or part of a structure. Air conditioned structures often have sealed windows, since open windows would work versus the system planned to preserve continuous indoor air conditions.

The portion of return air comprised of fresh air can normally be controlled by adjusting the opening of this vent. Common fresh air intake has to do with 10%. [] Air conditioning and refrigeration are provided 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 referred to as refrigerants.

It is vital that the a/c horse power suffices for the area being cooled. Underpowered air conditioning system will lead to power wastage and inefficient use. Sufficient horse power is needed for any air conditioning unit installed. The refrigeration cycle uses four important elements to cool. The system refrigerant starts 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 phase. An (also called metering device) regulates the refrigerant liquid to stream at the proper rate. The liquid refrigerant is gone back to another heat exchanger where it is enabled to evaporate, hence the heat exchanger is often called an evaporating coil or evaporator.

At the same time, heat is absorbed from inside and moved outdoors, leading to 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. 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 efficiencies, and are often integrated with seasonal thermal energy storage so that the cold of winter can be used for summer a/c. 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 because the storage acts as a heat sink when the system is in cooling (rather than charging) mode, causing the temperature level to slowly 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 (totally or partly) the outdoors air damper and close (completely or partly) the return air damper.

When the outside air is cooler than the required cool air, this will permit the need to be satisfied without using the mechanical supply of cooling (usually cooled 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 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 unit are frequently installed in North American homes, offices, and public buildings, however are challenging to retrofit (install in a structure that was not designed to receive it) because of the large air ducts required.

An option to packaged systems is making use of different indoor and outdoor coils in split systems. Split systems are chosen and commonly utilized around the world other than in The United States and Canada. In The United States and Canada, split systems are frequently seen in property applications, however they are getting appeal in little commercial buildings.

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

Indoor units with directional vents install onto walls, suspended from ceilings, or suit the ceiling. Other indoor units mount inside the ceiling cavity, so that short lengths of duct manage air from the indoor unit to vents or diffusers around the spaces. Split systems are more efficient and the footprint is generally smaller than the bundle systems.

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