Air Conditioning

Feeling exhausted by the scorching summer heat? The cool comfort of indoor air conditioning is just the thing you will be seeking. AC follows the same operating principles and basic components as your home refrigerator. Simply put, an AC system in your home with a cold indoor coil called the evaporator. The condenser plays a vital role in the functioning of an AC. It's a hot outdoor coil that releases the collected heat outside. The evaporator and condenser coils are serpentine tubing surrounded by aluminum fins. This tubing is usually made of copper. A pump, called the compressor, moves a heat transfer fluid i.e. refrigerant between the evaporator and the condenser. The pump forces the refrigerant through the circuit of tubing and fins in the coils. The liquid refrigerant evaporates in the indoor evaporator coil, pulling heat out of indoor air and thereby cooling the home.

In UK, you will three types of air conditioners in demand i.e. room air conditioners, split-system central air conditioners and packaged central air conditioners. Let's talk about room AC first. Room air conditioners cool rooms rather than the entire home. They provide cooling only where they're needed. When you are at your room, you can switch it on and when you are going out, just switch it off. That's it. Room air conditioners are less expensive to operate than central units. The efficiency level is also lower than that of central air conditioners. Smaller room AC generally draws less than 7.5 amps of electricity and can be plugged into any 15- or 20-amp, 115-volt household circuit that is not shared with any other major appliances. On the other hand, larger room air conditioners need their own dedicated 115-volt circuit as they draw more than 7.5 amps. To run the largest models, you will require a dedicated 230-volt circuit.

The cooling process of central AC is more sophisticated as it circulates cool air through a system of supply and return ducts. Supply ducts and registers carry cool air from the AC to the home. This cool air becomes warmer as it circulates through the home; then it flows back to the central air conditioner through return ducts and registers. A central AC basically is either a split-system unit or a packaged unit. In a split-system central air conditioner, you will find an outdoor metal cabinet containing the condenser and compressor, and an indoor cabinet comprising of the evaporator. In many split-system air conditioners, this indoor cabinet also contains a furnace or the indoor part of a heat pump. The air conditioner's evaporator coil is installed in the cabinet or main supply duct of this furnace or heat pump. If your home already has a furnace but no air conditioner, then go for a split-system, as this is the most economical central air conditioner till date. 

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