Central Air Conditioning: What House Owners Need to Know


Central air conditioners distribute cool air through a system of supply and return ducts. Supply ducts and signs up (i.e., openings in the walls, floorings, or ceilings covered by grills) bring carrier air conditioner cooled air from the a/c unit to the house. This cooled air becomes warmer as it flows through the home; then it recedes to the central air conditioning conditioner through return ducts and signs up.

A/c assist to dehumidify the incoming air, however in extremely humid climates or in cases where the a/c unit is oversized, it may not accomplish a low humidity. Running a dehumidifier in your air conditioned home will increase your energy usage, both for the dehumidifier itself and since the a/c will require more energy to cool your house. A more suitable alternative is a dehumidifying heat pipeline, which can be added as a retrofit to a lot of existing systems.

If you have a central air conditioning system in your home, set the fan to shut off at the very same time as the compressor, which is normally done by setting the "automobile" mode on the fan setting. In other words, do not use the system's main fan to provide air circulation-- use flowing fans in individual rooms.

Types of Central Air Conditioning Conditioners

A central air conditioning conditioner is either a split-system system or a packaged unit.

In a split-system main air conditioner, an outside metal cabinet contains the condenser and compressor, and an indoor cabinet consists of the evaporator. In many split-system air conditioning system, this indoor cabinet likewise includes a furnace or the indoor part of a heat pump. The ac system's evaporator coil is set up in the cabinet or primary supply duct of this furnace or heat pump. If your house currently has a heater however no air conditioner, a split-system is the most economical central air conditioning conditioner to set up.

In a packaged central air conditioner, the evaporator, condenser, and compressor are all situated in one cabinet, which generally is placed on a roofing or on a concrete piece next to your house's foundation. This kind of a/c unit also is used in little commercial structures. Air supply and return ducts originate from indoors through the home's exterior wall or roofing system to link with the packaged air conditioner, which air conditioner is generally located outdoors. Packaged air conditioning unit typically consist of electric heating coils or a natural gas heating system. This mix of air conditioner and main heating unit eliminates the need for a different heating system inside.

Selecting or Upgrading Your Central Air Conditioner

Central air conditioning conditioners are more effective than space ac system. In addition, they run out the method, peaceful, and hassle-free to operate. To save energy and money, you should attempt to purchase an energy-efficient a/c unit and lower your central air conditioning conditioner's energy usage. In an average air-conditioned home, cooling consumes more than 2,000 kilowatt-hours of electrical energy each year, triggering power plants to discharge about 3,500 pounds of co2 and 31 pounds of sulfur dioxide.

If you are thinking about adding main air conditioning to your home, the deciding factor might be the requirement for ductwork.

If you have an older main air conditioner, you might pick to replace the outdoor compressor with a contemporary, high-efficiency system. If you do so, speak with a local heating and cooling specialist to ensure that the new compressor is properly matched to the indoor system. However, thinking about current modifications in refrigerants and a/c styles, it might be better to change the entire system.

Today's finest a/c unit use 30% to 50% less energy to produce the exact same quantity of cooling as a/c unit made in the mid 1970s. Even if your ac system is only ten years old, you may conserve 20% to 40% of your cooling energy expenses by replacing it with a newer, more efficient model.

Proper sizing and installation are essential elements in figuring out air conditioning unit effectiveness. Too big a system will not adequately remove humidity. Too small an unit will not be able to attain a comfortable temperature on the most popular days. Inappropriate system location, lack of insulation, and incorrect duct installation can significantly reduce effectiveness.

When buying an a/c unit, try to find a design with a high efficiency. Central air conditioning conditioners are ranked according to their seasonal energy performance ratio (SEER). SEER suggests the relative quantity of energy required to supply a specific cooling output. Lots of older systems have SEER ratings of 6 or less.

If your air conditioning system is old, consider buying an energy-efficient design. Look for the ENERGY STAR ® and EnergyGuide labels-- qualified main units are about 15% more effective than standard models. New property central air conditioner standards entered into impact on January 1, 2015; see the effectiveness standards for central air conditioning conditioners for details, and consider buying a system with a greater SEER than the minimum for higher cost savings.

The standards do not require you to alter your existing central air units, and replacement parts and services should still be readily available for your house's systems. The "life expectancy" of a central air conditioner is about 15 to 20 years. Makers typically continue to support existing devices by making replacement parts offered and honouring upkeep contracts after the brand-new standard goes into impact.

Other functions to search for when buying an air conditioner include:

- A thermal expansion valve and a high-temperature score (EER) greater than 11.6, for high-efficiency operation when the weather is at its hottest

- A variable speed air handler for new ventilation systems

- A system that runs silently

- A fan-only switch, so you can use the system for nighttime ventilation to substantially reduce air-conditioning costs

- A filter check light to advise you to examine the filter after a predetermined number of running hours

- An automatic-delay fan switch to turn off the fan a few minutes after the compressor shuts off.

Setup and Area of Air Conditioners

If your air conditioner is installed properly, or if significant setup issues are found and repaired, it will perform effectively for many years with only minor regular upkeep. However, many air conditioning system are not set up properly. As an unfortunate result, contemporary energy-efficient a/c unit can carry out almost as inadequately as older ineffective designs.

When setting up a brand-new central air conditioning system, be sure that your specialist:

- Allows adequate indoor area for the setup, maintenance, and repair of the brand-new system, and sets up a gain access to door in the furnace or duct to supply a method to clean the evaporator coil

- Utilizes a duct-sizing method such as the A/c Specialists of America (ACCA) Handbook D.

- Guarantees there suffice supply registers to deliver cool air and adequate return air signs up to carry warm house air back to the a/c unit.

- Installs duct within the conditioned space, not in the attic, anywhere possible.

- Seals all ducts with duct mastic and greatly insulates attic ducts.

- Locates the condensing system where its noise will not keep you or your neighbours awake in the evening, if possible.

- Finds the condensing system where no nearby items will block air flow to it.

- Confirms that the recently set up ac system has the precise refrigerant charge and airflow rate specified by the manufacturer.

- Finds the thermostat far from heat sources, such as windows or supply signs up.

If you are replacing an older or stopped working split system, be sure that the evaporator coil is changed with a brand-new one that exactly matches the condenser coil in the brand-new condensing unit. (The ac system's efficiency will likely not enhance if the existing evaporator coil is left in location; in reality, the old coil might cause the new compressor to fail prematurely.).