Disclosure: This post contains affiliate links. As an Amazon Associate I earn from qualifying purchases. If you choose to purchase through these links, I may earn a small commission at no additional cost to you. I only recommend products that align with what is generally used and recommended in the indoor air quality and moisture control field.

When people think about mold in buildings, they often think about visible water damage — a flooded basement, a leaking roof, or condensation on a window. What is less commonly understood is that the HVAC system in a home can be a contributing factor in mold development, even without an obvious water event.

How HVAC Systems and Moisture Interact

The cooling function of an air conditioning system removes heat from the air — but it also removes moisture. The evaporator coil is intentionally designed to allow condensation to form on its surface and drain away. This process works as intended when the system is properly sized, maintained, and d...

Disclosure: This post contains affiliate links. As an Amazon Associate I earn from qualifying purchases. If you choose to purchase through these links, I may earn a small commission at no additional cost to you. I only recommend products that align with what is generally used and recommended in the indoor air quality and moisture control field.

Most homeowners who have dealt with mold have noticed the same frustrating pattern — they clean it, treat it, paint over it, and within weeks or months it is back. Sometimes in the same spot. Sometimes somewhere new.

If this sounds familiar, the problem is generally not the mold itself.

The problem is generally the moisture condition that is allowing mold to grow.

Mold Is a Symptom — Not the Problem

This is one of the most important concepts in mold awareness, and it is one that many homeowners miss.

Mold does not appear randomly. It does not grow because a home is old, or because of the climate, or because of bad luck. Mold grows when specific...