Coil Cleaning in Houston, TX

Why Houston attic coils load up faster than most

Look at your air handler's orientation first. Houston builders set most of them horizontal, flat on the attic joists. Horizontal units have a shallow drain pan. Shallow pans overflow sideways, not down a pipe. Vertical closet units in older inner-Loop bungalows rarely do this.

Now check the upstream coil face. That is the dirty side. Technicians who clean through the blower door never touch it. Pull the plenum access or cut one in. Gumbo clay soil shifts pier-and-beam houses, so return boots crack open at the ceiling plate and pull raw attic air past the filter edge.

The dirt here is specific. Blown-in cellulose mixes with gypsum dust from popcorn ceiling removal. Old fiberglass strands add to it. Spanish moss debris and oak pollen from Heights and Bellaire canopies get in through gable vents. That mix mats on wet aluminum and turns into a felt pad.

Secondary drain pans tell you the history. Rust stains on the emergency pan mean it already overflowed once. A dripping condensate stub over your patio door means the primary line is blocked right now. Both are inspection items you can verify yourself before calling anyone.

Replacing the coil makes sense when fins are already pitted from acidic cleaners.