How Air Conditioning Helps to Control Mold
Mold is a common problem in the southern states. Mold can grow in your home if the interior humidity level rises above 65%. This would be a common occurrence if you did not use your air conditioner. As the air passes through the evaporator coil, it collects the moisture and sends it out through your drain line. If to unit is to big, it will not run enough to dehumidify. So it is important that you buy the right system for your home.
Sizing the heating and air conditioning system correctly is the most important step. Have your contractor do a sizingcalculation (manual J) before signing a contract. This service is usually offered at little or no cost to homeowners by gas and electric utilities and heating and air conditioning contractors.
What to consider when sizing your new system:
The homes location
Size and orientation of the house
Windows size, location, and type
Air infiltration rates
The number of occupants
Occupant comfort preferences
The types and efficiencies of lights and major home appliances
A much to common scenario with contractors is reading the tag on your existing system and quoting you for a replacement of similar or greater size. This can lead to humidity problems, especially if your existing system was sized improperly to begin with.
Assuming tha tyou have now properly sized your heating and air conditioning system for your home, you must decided what type to buy. A standard single stage system will work fine, but a 2 stage system will work better.
A 2 stage system is one that has a 2 stage compressor (either 2 compressors of varying sizes or 1 compressor which changes speeds) matched with a variable speed air handler and a 2 stage thermostat,preferably with humidity control(thermostat reviews here). These systems run longer, but at low speed (unless demand increases) to remove more moisture and better circulate the air in your home. These are more energy efficient and usually range from 16 SEER and higher.
Rheem, Trane, Carrier and Lennox make comparable 2 stage systems. Check with your local contractors to see which one is offering the best incentives.