Indoor air by house age: a 1970s block ranch, a 1990s villa and a 2020s stucco two-story

Three eras of Ocala house, three kinds of indoor air

Marion County’s homes were built in waves, and the census says so: roughly 18 percent of Ocala’s housing went up in the 1970s, another 18 percent in the 1980s, 18 percent more in the 2000s, and 15 percent since 2010. Each wave used a different construction method, a different duct design and a different kind of equipment, and each one has its own indoor-air signature today.

The 1970s and 1980s block ranch. Concrete block on a slab, air handler in the attic, flex duct that is now older than most of the people under it. These are the houses of Silver Springs Shores and Marion Oaks, and they leak: air into the attic from the supply side, attic air into the return side. The indoor air is whatever the attic is, with dust and 130-degree humidity mixed in.

The 1990s and 2000s villa. Package or split heat pumps serving tight, small floor plans in Ocala Palms, On Top of the World, Oak Run and Stone Creek. The original equipment is aging out, and the replacements are often oversized, which means short cycles, high humidity and a coil that never dries.

The 2010s and 2020s stucco home. Fore Ranch’s later phases, Heath Brook, Calesa Township, Ocala Preserve. Built tight to current code, with sealed attics and foam in the walls. They don’t leak. That’s the problem: cooking, cleaning products, new-material off-gassing and the humidity from showers have no way out, and the carbon dioxide reading in a closed bedroom climbs overnight.

Who picks up the phone about indoor air

Three callers, in rough order of frequency.

The allergy household, usually in February or March when the oak pollen is at its worst and the symptoms are worse indoors than out. The person who just bought a house in a 55+ community and noticed that it smells like the previous owner’s dog, or like a damp closet, no matter how much they clean. And the owner of a new build who can’t understand why the windows fog on the inside and the bedroom feels stuffy by morning in a house that’s two years old.

Businesses call too: a dental office on SR 200 worried about what a 1980s building’s ducts are circulating into exam rooms, a daycare near downtown, a horse-farm office off US 441 with arena dust finding its way inside.

A Marion Oaks ranch, an Ocala Palms villa, a Heath Brook new build

Here is how the assessment and the fix differ across the three eras.

The Marion Oaks ranch, built 1979. The particle count at the return is high and the attic is the reason. Two supply joints and one return connection have let go. The humidity reads 62 percent at 75 degrees. The fix starts in the attic: seal and reconnect the duct, which Ocala Electric Utility pays a rebate toward with a licensed contractor’s receipt for city addresses, then a media filter cabinet at the air handler. No purifier, no gadget. Dust drops and so does the bill.

The Ocala Palms villa, built 1996, system replaced 2015. The replacement heat pump is a half-ton oversized for a 1,400-square-foot villa. It runs eight minutes and shuts off, and the house sits at 72 degrees and 60 percent humidity with a musty smell at the return. Coil growth is starting. The fix is a UV lamp at the coil for the short term and an honest conversation about a whole-home dehumidifier or, when the system ages out, a correctly sized Lennox replacement.

The Heath Brook two-story, built 2021. Carbon dioxide in the master bedroom reads high by morning. Window condensation on cold mornings. Nothing leaks; nothing is dirty. The house needs air. An energy recovery ventilator tied into the return brings in outside air while shedding most of its humidity and heat, which in a 72-degree Ocala dew point is the only way fresh air makes sense.

Book an indoor-air assessment

How an indoor-air assessment runs

1. The year the house was built. We ask on the phone, because it narrows the search before the truck leaves Palm Coast.
2. Readings in every occupied room: temperature, humidity, particle count, and carbon dioxide in newer homes. Written down, with the outdoor readings for comparison.
3. Airflow at each register, which finds the starved bedroom and the leaking run.
4. The equipment: filter slot, coil, drain pan, blower, and the question of whether the system is sized right for the house.
5. The ductwork, in the attic or under the floor, by eye and by pressure test where it’s warranted.
6. The water, on the forty percent of Marion County parcels on private wells, because hard, iron-rich water scales humidifier media and condensate pumps and changes what we’d recommend.
7. A written report with the readings, the likely causes in order, and a priced recommendation for each one, so you can do the first thing now and the rest later.

Equipment we install when the report calls for it: media filter cabinets, Lennox Healthy Climate filtration and purification, UV lamps at the coil, whole-home dehumidifiers, energy recovery ventilators, and duct sealing or replacement. What we won’t install is something the readings didn’t ask for.

What we stand behind

Every piece of equipment carries its manufacturer’s parts warranty, registered by us. The installation is covered by Cook’s satisfaction guarantee. If a recommendation doesn’t change the readings, we come back and find out why, because the numbers on the report are the standard we set for ourselves. Ask for the labor terms on air-quality equipment before you sign. [[CONFIRM WITH JERRY]]

Pricing is quoted before the work and is the same at any hour; there is no after-hours charge. Financing with low monthly payments applies to larger jobs such as a dehumidifier or ventilator paired with a new system, and the Duke, OEU or Clay Electric rebate that fits the address goes into the paperwork. Ask whether Cook’s is on any utility’s enrolled-contractor list. [[CONFIRM WITH JERRY]]

Ocala is the fastest-growing metro in the country, which means the 2020s wave of houses is the one growing fastest, and the one with the newest kind of air problem. The 1970s wave isn’t going anywhere either. We work on both, and the first question is always the same: what year was it built?