New Air Conditioning Systems For Old Homes
Written by Elizabeth Wood
Editor In Chief, United Home Improvement

Often times, older homes fall victim to hot summer days. Most of them are not equipped with the proper space to install ductwork for a traditional central air conditioning system. Of course you have the option of using mounted air conditions to cool off temperatures, but then you will have deal with loud noises and an unpleasant home exterior. Consider some other alternatives that will work well in your older home.

Retrofit Systems:

• Mini-split systems: Used in homes, where extending or installing distribution ductwork is not feasible. Mini-split systems are ductless, individual cooling units that require a conduit, which houses the power cable, refrigerant tubing, suction tubing, and a condensate drain to link an outdoor compressor/condenser and indoor units. Mini-split systems are small in size and very flexible for zoning or heating and cooling individual rooms. Typically, models can have up to four units and are easily installed. Also, mini-split systems avoid the energy losses associated with ductwork of central forced air systems. Cost = about $1,500-$2,000 per ton.

• High-velocity systems: This system works on the principle of aspiration. Chilled air delivered to a room enters at high velocities. They use small 2" insulated tubing for supply lines. This small tubing results in a low impact on existing space, typically fitting within walls and between floor joists. Cost = about $8,000-$10,000.

Make sure that when installing an air conditioning system, you know that bigger is not always a better option. The size of your home and proper installation play a bigger role on the success of your system. Consult with a professional installer about the air conditioning system that is right for your house.

In addition, with older homes, it is important to consider your homes electrical system. Central air conditioners require a dedicated 230-volt circuit and may require 20 to 50 amps of power. Many older homes work off a 110-volt, 60-amp service. If this is the case, you may need to consider making an electrical service upgrade.

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