Home Cooling Systems: Basic Design Practices Used in Split-System Models

Your central home cooling unit applies multiple operating principles to create a comfortable environment. Some systems focus on one aspect of comfort while central designs manage the entire package. Central home cooling systems make use of the same basic components to perform both heating and refrigeration processes. Central designs are not appropriate for every climate, but are the most used.

Heat pumps or evaporative refrigeration systems are alternative choices to central units. Evaporative refrigeration methods, or swamp coolers, use pads saturated with water in combination with blown air to accomplish evaporative chilling. Heat pumps can be used as part of a split system or on their own depending on how they are installed.

To accomplish refrigeration, an internal heat pump will pull warmth out of your home and then rapidly cool it to be redistributed through the ventilation system. Traditional central designs contain an outside condensing unit and an internal air handler. Refrigeration processes occur within the outside unit while the handler performs all air distribution functions.

HVAC Replacement: The Central Air Refrigeration Process

A basic understanding of this design can help you determine if it is the right choice for HVAC replacement. The outside central air-conditioning unit is designed to cool air by means of a refrigerant. It consists of the compressor and the condensing coils that attach to the internal evaporator coil through copper tubing. The heating and cooling components use ductwork, the thermostat, and an internal blower. When you change the thermostat setting, the air handler moves warm internal air to the outside refrigeration components for chilling. After being chilled, it is recirculated by the blower through the ductwork to each vent or register within your home.

Refrigerant changes between liquid and gas form as the compressor cycles. The liquid form absorbs the warmth that is released outside as gas through the condensing coils. Heat removal makes the temperature more comfortable as it is redistributed. This is the basic breakdown of how a central system can run; however, the setup can be more complex depending on various structural design factors. Some homes cannot accommodate this setup, causing alternative cooling methods to be required. A thorough evaluation should be performed by an HVAC replacement professional to ensure the right setup is being implemented.

These systems produce less noise and vibration when in operation. They eliminate the need for multiple cooling devices and provide the most reliable air circulation.

Particle accumulation within the ductwork is the biggest drawback of these systems. Neglected filter changes cause this problem to be more significant. Cleaning ventilation ducts should be part of preventive yearly maintenance.

Choosing the right system for your home can be confusing. While a central unit is common in most homes, there may be a more suitable option for your particular household environment. Contact a Bardi professional today to learn more about available cooling options or to schedule an evaluation.


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