Top AC & Heating Experts for commercial hvac service technician Prince George, VA. Dial +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 positive or unfavorable with respect to outside the space. Favorable pressure happens when there is more air being provided than exhausted, and is common to decrease the infiltration of outdoors pollutants. Natural ventilation is an essential aspect in decreasing the spread of airborne health problems such as tuberculosis, the cold, influenza and meningitis.

Natural ventilation needs little maintenance and is low-cost. An a/c system, or a standalone air conditioner, offers cooling and humidity control for all or part of a building. Air conditioned structures typically have actually sealed windows, due to the fact that open windows would work versus the system planned to keep consistent indoor air conditions.

The portion of return air made up of fresh air can generally be controlled by adjusting the opening of this vent. Common fresh air consumption is about 10%. [] Cooling 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 described as refrigerants.

It is necessary that the cooling horse power is adequate for the area being cooled. Underpowered air conditioning system will result in power waste and ineffective usage. Sufficient horse power is needed for any air conditioning unit installed. The refrigeration cycle uses 4 necessary aspects to cool. The system refrigerant begins 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 outdoors, cools, and condenses into its liquid stage. An (also called metering gadget) controls the refrigerant liquid to flow at the correct rate. The liquid refrigerant is gone back to another heat exchanger where it is allowed to vaporize, thus the heat exchanger is typically called an evaporating coil or evaporator.

At the same time, heat is taken in from inside and moved outdoors, leading to cooling of the structure. In variable climates, the system might include a reversing valve that switches from heating in winter to cooling in summer. By reversing the circulation of refrigerant, the heatpump refrigeration cycle is changed from cooling to heating or vice versa.

Free cooling systems can have really high efficiencies, and are often combined with seasonal thermal energy storage so that the cold of winter can be used for summertime air conditioning. 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 acts as a heat sink when the system is in cooling (rather than charging) mode, triggering the temperature to slowly increase throughout the cooling season. Some systems include an “economizer mode”, which is often called a “free-cooling mode”. When saving money, the control system will open (completely or partly) 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 need to be fulfilled without using the mechanical supply of cooling (generally chilled water or a direct growth “DX” system), hence conserving energy. The control system can compare the temperature level of the outdoors air vs.

In both cases, the outdoors air needs to be less energetic than the return air for the system to enter 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, workplaces, and public structures, however are difficult to retrofit (set up in a building that was not designed to receive it) because of the bulky air ducts needed.

An alternative to packaged systems is making use of different indoor and outdoor coils in split systems. Split systems are preferred and extensively utilized around the world other than in North America. In The United States and Canada, divided systems are frequently seen in domestic applications, however they are gaining appeal in small industrial buildings.

The benefits of ductless cooling systems include easy setup, no ductwork, greater zonal control, flexibility of control and quiet operation. [] In area conditioning, the duct losses can represent 30% of energy consumption. Making use of minisplit can result in 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 fit into the ceiling. Other indoor systems install inside the ceiling cavity, so that brief lengths of duct handle air from the indoor unit to vents or diffusers around the rooms. Split systems are more effective and the footprint is generally smaller sized than the plan systems.

Call Now