New parents do the obvious things. They paint the nursery weeks in advance so the VOCs can off-gas. They wash the newborn clothes in fragrance-free detergent. They install the car seat. They scrub the bathroom until it's hospital-grade.

Then they skip the one system that moves every cubic foot of air their baby breathes — the HVAC ductwork.

Why it matters more for infants

Infants breathe about twice as many breaths per minute as adults (~40 vs ~20). They spend ~16 hours a day sleeping, often in the room closest to the return register. Their immune systems are still developing. Their airways are physically smaller, which means the same concentration of particulates has a larger functional effect.

None of this is controversial. It's pediatric pulmonology 101.

What's in unserviced ducts

If your home has had more than one owner or any renovation in the last decade, your ducts contain some combination of:

  • Construction dust and drywall debris from the original build and every subsequent renovation
  • Pet dander from any previous owner who had a cat or dog
  • Dust mite waste (the single most common indoor allergen)
  • Mold spores from any condensate issues
  • Biofilm on the evaporator coil and plenum interior
  • Rodent contamination in attic and crawlspace ducts (more common than people realize)

Every time the HVAC runs, some percentage of this gets redistributed. It's the source of the "new house smell" that isn't really new.

The practical move

Book a full duct clean 4–6 weeks before the due date. This gives you time for the post-service measurement to settle, the UV light (if installed) to run through a full cycle, and your HVAC filter to be swapped to a pleated MERV 11 (baby-appropriate) filter.

We can do everything in one visit:

  • Air duct cleaning ($399)
  • UV light installation in-duct ($349 bundled) — kills mold and bacteria as air passes through
  • Bathroom fan cleaning ($49 bundled) — mold-prone in nurseries adjacent to baby bathrooms
  • Dryer vent ($149) — you'll be running the dryer a lot more

What we measure

Before we start, laser particle count in the nursery. After we finish, the same measurement. You'll see the delta on a piece of paper we hand you. For most homes the post-clean count is 60–85% lower than pre-clean.

Get it on the calendar before the delivery-date scramble takes over. Book online or call (408) 655-0609.