Top Rated HVAC Pros for emergency hvac near West Point, VA. Phone +1 804-409-9159. 24 Hour Calls. Guaranteed Services – Low Prices.

Contact Us

River City Heating & Air

6404 Mallory Dr, Richmond, VA 23226, United States

Telephone

+1 804-409-9159

Hours

Mon-Fri, 8am – 5pm

Room pressure can be either favorable or unfavorable with respect to outside the room. Positive pressure takes place when there is more air being provided than exhausted, and prevails to decrease the seepage of outside contaminants. Natural ventilation is an essential aspect in decreasing the spread of airborne diseases such as tuberculosis, the common cold, influenza and meningitis.

Natural ventilation needs little maintenance and is low-cost. An air conditioning system, or a standalone a/c unit, supplies cooling and humidity control for all or part of a structure. Air conditioned buildings frequently have sealed windows, due to the fact that open windows would work versus the system planned to keep continuous indoor air conditions.

The portion of return air comprised of fresh air can normally be controlled by changing the opening of this vent. Common fresh air intake is about 10%. [] Cooling 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 referred to as refrigerants.

It is crucial that the a/c horsepower suffices for the location being cooled. Underpowered a/c system will cause power waste and inefficient usage. Sufficient horse power is needed for any a/c set up. The refrigeration cycle utilizes 4 necessary 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) manages the refrigerant liquid to flow at the correct rate. The liquid refrigerant is gone back to another heat exchanger where it is allowed to evaporate, hence the heat exchanger is typically called an evaporating coil or evaporator.

While doing so, heat is absorbed from indoors and moved outdoors, resulting in cooling of the building. In variable climates, the system might consist of a reversing valve that switches 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 extremely high efficiencies, and are sometimes combined with seasonal thermal energy storage so that the cold of winter can be utilized for summer 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 heatpump is added-in because the storage serves as a heat sink when the system is in cooling (instead of charging) mode, causing the temperature level to gradually increase throughout 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 (completely or partially) 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 fulfilled without utilizing the mechanical supply of cooling (generally cooled water or a direct expansion “DX” system), therefore conserving energy. The control system can compare the temperature level of the outside air vs.

In both cases, the outside air should be less energetic than the return air for the system to get in the economizer mode. Central, “all-air” air-conditioning systems (or package systems) with a combined outside condenser/evaporator system are often set up in North American homes, offices, and public buildings, however are difficult to retrofit (set up in a structure that was not designed to get it) due to the fact that of the bulky air ducts needed.

An alternative to packaged systems is using different indoor and outdoor coils in split systems. Split systems are chosen and commonly utilized around the world other than in North America. In The United States and Canada, divided systems are frequently seen in residential applications, however they are getting appeal in small business structures.

The benefits of ductless cooling systems include easy installation, no ductwork, higher zonal control, flexibility of control and quiet operation. [] In area conditioning, the duct losses can account for 30% of energy consumption. The use of minisplit can result in energy 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 mount inside the ceiling cavity, so that short lengths of duct manage air from the indoor unit to vents or diffusers around the rooms. Split systems are more effective and the footprint is usually smaller sized than the plan systems.

Call Now