Tight new houses and leaky old ones have opposite air problems

The housing era is the diagnosis

Walk into a 1970s concrete-block ranch in Palm Coast’s older sections or along the Halifax in Ormond Beach, and the air is moving whether you want it to or not. Jalousie windows, unsealed penetrations, attic duct with original tape: the house breathes constantly, trading cooled air for humid outside air all day. Dust comes in with it. So does pollen from the live oaks.

Walk into a 2015 stucco two-story in a Jacksonville subdivision and the opposite is true. Sealed windows, house wrap, foam at every penetration. The air conditioner can hold humidity easily because little outside air gets in, but nothing gets out either. Cooking, showers, a new sofa’s finish, a dog: all of it stays.

The two houses need opposite treatment. That’s why Cook’s air quality work starts with the building, not with a product catalog.

What each era does to the equipment

Older, leaky homes load the air conditioner with humidity it was never sized for, which is why an oversized replacement in one of these houses makes the dampness worse: it chills the air in minutes and cycles off long before the moisture has been pulled out. Returns are often undersized and leaky, pulling attic air past the filter. Duct joints have opened.

Newer, tight homes can starve the system of fresh air and let indoor pollutants accumulate. Humidity is controlled but CO2, odors and off-gassing are not. The ducts are usually fine; the problem is that nothing is bringing outside air in on purpose.

In between, the 1990s and 2000s homes that make up much of the territory, there’s a bit of both: decent envelopes with aging duct and returns that were sized for a smaller system.

Cook’s approach

1. Assessment. A walk through the house with a hygrometer and a particle meter, a look at every return and supply, the duct in the attic, and the air handler’s coil and drain pan. Questions about who in the house has symptoms and when.
2. Fix the mechanical first. A leaking return, an oversized system or a wet coil undoes any product bolted on later. Cook’s prices those repairs before anything else.
3. Then match equipment to the problem. Media filtration or Lennox Healthy Climate filtration for particles. A whole-home dehumidifier for the damp older house. An ERV or fresh-air intake for the sealed newer one. UV at the coil where biological growth is the issue. Each is its own line on the quote.
4. Verify. Readings after the work, compared with the ones taken at assessment.

Book an air quality assessment

Residential and commercial

Homes are about the people in them: allergies, asthma, a musty bedroom. Commercial air quality is about code and occupancy: outside-air requirements for a restaurant or a classroom, humidity control for a storage business, filtration for a clinic. Cook’s handles both, and the commercial side often starts with the ventilation the building was supposed to have and has stopped delivering.

Maintenance afterward

Air quality equipment is only as good as its upkeep. Media filters change on a schedule measured in months, not weeks; dehumidifier filters and drains need the same attention as the air handler’s; UV lamps lose output and are replaced on a schedule; ERV cores are cleaned. Cook’s folds these into the maintenance visit for customers on an agreement and leaves a written schedule for those who aren’t. Equipment carries its manufacturer’s warranty and Cook’s labor warranty, term [[CONFIRM WITH JERRY]].

Local pages for your housing stock

The age mix is different in every county, and so is what Cook’s finds. See Palm Coast, Ormond Beach or Jacksonville.