Three St. Augustine housing eras, three kinds of bad air, and the Healthy Climate piece that answers each

What each era of St. Augustine house puts into the air

The 1920s bungalow in Nelmar Terrace, Fullerwood Park or Uptown has plaster-and-lath walls that shed fine dust, sash windows that admit every grain of oak pollen from February to April, and closets on exterior walls that hold moisture and grow mildew. Its air problem is particles and damp.

The 1970s block ranch in St. Augustine Shores or St. Augustine South has original ductwork, a coil that stays wet nine months a year, and the humidity that a single-stage system never quite removes. Its air problem is the musty blast at startup, which is mold on the coil, and the damp behind it.

The 2005 stucco two-story in World Golf Village or Murabella is tight. It holds carpet and cabinet chemicals, cooking odors, and the carbon dioxide of a family sleeping behind closed doors. Its air problem is stale air and fine particles the grille filter missed.

The problem the line is built to solve

The Lennox Healthy Climate line exists because an air conditioner’s job is temperature, and everything else people want from their indoor air has to be added: catching particles, killing what grows on wet surfaces, removing gases and odors, taking water out of the air, and bringing outdoor air in without the heat. Each piece does one of those jobs and none does all of them.

The pieces, generically

• Media air cleaner. A four- or five-inch filter cabinet at the air handler. Particles: pollen, dust, dander, spores.
• Whole-home purifier. Filtration plus a UV-and-catalyst stage that breaks down odors and chemical vapors. The piece for the tight new house.
• Germicidal UV lamp. Mounted at the coil and drain pan to keep mold from growing where it is always wet.
• Whole-home dehumidifier. Water removal on its own control. The piece for the old house.
• Energy-recovery ventilator. Fresh air in, stale air out, with the heat and humidity mostly left outside.
• Humidifier. Rarely needed here; a January product for a few specific households.
• Thermostat with air-quality control. Runs the dehumidifier and ventilator on their own logic rather than piggybacking on cooling calls.

Installing them in a closet, a garage and an attic

The bungalow’s retrofit air handler is usually in a closet with no room to spare; the media cabinet goes in a reworked return grille instead, the dehumidifier gets its own closet or the crawlspace, and UV fits anywhere there is a coil. The block ranch’s garage air handler is the easy case: cabinet, UV and dehumidifier all mount within reach, with the dehumidifier ducted into the return. The attic air handler in the two-story takes a platform and a light before anything else goes in; UV and the cabinet mount at the unit, the ventilator needs a path to an outside wall or soffit, and the dehumidifier either joins it in the attic on its own drain and float switch or goes in the garage below.

Ask which pieces fit your air handler

Care that keeps it working

Media filters change twice a year, lined up with the spring and fall maintenance visits. UV lamps are replaced on schedule, not when they go dark. Dehumidifier filters get rinsed monthly during pollen season. Ventilator cores are vacuumed at each visit. None of it is hard; all of it is skipped in houses where nobody set the schedule, which is why we build it into the service agreement rather than leaving it to memory. Agreement details: [[CONFIRM WITH JERRY]].