Ventilating homes has its challenges in every climate, but ventilating homes in humid climates is special, says Green Building Advisor contributor Allison Bailes III. To ensure homeowners don’t feel sticky while inside their homes, he offers six ways to ventilate a humid-climate home. It starts with an option that should be avoided, two methods that are sufficient if done properly, and ends with the three best options, according to Bailes.

Fans blowing in, out, or both
Mechanical ventilation simply means moving air with fans. A whole-house mechanical ventilation system moves air between indoors and outdoors to change the air in the house. The easiest way to provide this type of ventilation is to run fans that exhaust air from the house, supply air to the house, or both.

Exhaust-only ventilation is not a good idea in humid climates because it sucks warm, humid air into the building assemblies, which can lead to mold growth and moisture damage. Supply-only ventilation is only a little better. It does put the house under positive pressure, but you’re dumping warm, humid outdoor air right into the house. Yes, you can temper it by mixing it with indoor air before introducing it, but all the water vapor is still there.

Read More