Types Of HVAC System And How They Work 3 Levels of Air Conditioning Equipment in Texas 1) Two-speed compressor outside and variable speed air handler on the inside: This total comfort system is the highest efficiency equipment available. When weather is extreme the compressor outside goes into high speed, the fan on the inside unit also goes into high speed. This complete combination maximizes cooling and de-humidification when needed. When demand is low this unit automatically goes into low speed outside and inside. When the unit is in low speed your efficiency increases and the amount of humidity removed greatly increases. The out of pocket expense is more but the advantages and annual savings far outweigh the cost. The condensing unit has an outdoor sensor so the thermostat displays outdoor temperature as well as indoor temperature. The system is completely automatic and controls exact temperature and humidity levels in the house. The two speed system pulls out 30 times the humidity as a standard system on a humid day. You dont have to be an engineer to operate it, they are very user friendly. system pulls out 30 times the humidity as a standard system on a humid day. It sounds complicated but its not anyone can operate it. (2) Single-speed compressor outside with variable speed air handler on the inside: This system doesnt remove humidity like the two-speed compressor but it is a big step up from the standard. The compressor speed never changes but the advantage is that elite fan motor on the inside does. So In the morning or evening when demand is not as great the fan goes into low speed, this feature lets the system remove an extreme amount of humidity. The truth is when your system is cycling on and off frequently such as in the morning or evening, the startup draws the most amount of energy, this is called short cycling. Short cycling with standard systems is very common. The variable speed blower will slow down the airflow and let the system run longer and end short cycling. This feature is completely automatic and with a THERMIDISTAT (thermostat with humidity control and outdoor temperature sensor) you can set your desired temperatures and humidity levels. This system removes 128 percent more humidity than with a standard system. It is an ideal feature for extreme Humid climates. (3) Standard system- is a single-speed compressor outside and single speed air handler inside. This system is probably going to perform similar to the one you currently have when it was new. Only todays models are a lot more efficient. It is only temperature controlled, so when the temperature inside the house is warmer than your set temperature the unit will cut on until the house is satisfied. It blows ice cold air at the same flow on a 75 degree day as it would on a 95 degree days.
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