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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 favorable or negative with respect to outside the room. Favorable pressure happens when there is more air being supplied than tired, and prevails to reduce the infiltration of outdoors impurities. Natural ventilation is a key aspect in minimizing the spread of airborne illnesses such as tuberculosis, the common cold, influenza and meningitis.

Natural ventilation needs little maintenance and is economical. An air conditioning system, or a standalone a/c, supplies cooling and humidity control for all or part of a structure. Air conditioned structures frequently have sealed windows, since open windows would work against the system planned to preserve constant indoor air conditions.

The portion of return air made up of fresh air can generally be controlled by changing the opening of this vent. Common fresh air intake is about 10%. [] A/c and refrigeration are provided 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 important that the a/c horse power is enough for the area being cooled. Underpowered air conditioning system will cause power wastage and inefficient usage. Appropriate horse power is required for any ac system set up. The refrigeration cycle uses four essential aspects to cool. The system refrigerant starts its cycle in a gaseous state.

From there it enters a heat exchanger (sometimes called a condensing coil or condenser) where it loses energy (heat) to the outside, cools, and condenses into its liquid stage. An (likewise called metering gadget) controls the refrigerant liquid to stream at the correct rate. The liquid refrigerant is gone back to another heat exchanger where it is permitted to vaporize, thus the heat exchanger is typically called an evaporating coil or evaporator.

At the same time, heat is taken in from inside your home and moved outdoors, resulting in cooling of the building. In variable environments, the system may include a reversing valve that changes from heating in winter season to cooling in summer. By reversing the circulation of refrigerant, the heat pump refrigeration cycle is changed from cooling to heating or vice versa.

Free cooling systems can have very high efficiencies, and are often combined with seasonal thermal energy storage so that the cold of winter can be utilized for summertime cooling. Typical storage mediums are deep aquifers or a natural underground rock mass accessed via a cluster of small-diameter, heat-exchanger-equipped boreholes.

The heat pump is added-in because the storage acts as a heat sink when the system is in cooling (rather than charging) mode, triggering the temperature to slowly increase during 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 (completely or partially) the outdoors air damper and close (completely or partially) the return air damper.

When the outside air is cooler than the required cool air, this will allow the demand to be satisfied without using the mechanical supply of cooling (generally chilled water or a direct expansion “DX” system), thus conserving energy. The control system can compare the temperature level of the outside air vs.

In both cases, the outdoors 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 plan systems) with a combined outdoor condenser/evaporator system are frequently installed in North American homes, offices, and public buildings, however are tough to retrofit (set up in a structure that was not developed to receive it) because of the large duct required.

An alternative to packaged systems is using different indoor and outside coils in split systems. Split systems are chosen and widely used worldwide other than in North America. In North America, split systems are frequently seen in domestic applications, but they are acquiring popularity in small business structures.

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

Indoor units with directional vents mount onto walls, suspended from ceilings, or fit into 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 sized than the package systems.

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