Indoor Air Quality Checklist for New Homeowners in Florida — What to Do in Your First 90 Days

Moving into a Florida home — whether it's your first or your fifth — is an opportunity to establish your indoor air quality baseline on your own terms. The first 90 days are the window when you have the least attachment to current conditions, the most motivation to address what you find, and the most practical access to make changes before the home is fully settled.

Here's a practical, sequenced checklist for new Florida homeowners.

Week 1: Assessment

Find out the HVAC maintenance history. Ask the seller, the seller's agent, or the property management company: when was the evaporator coil last professionally cleaned? When was the duct system last serviced? If purchasing a resale home, this history is almost never volunteered — you have to ask specifically. The answer "I don't know" or silence is itself useful information.

Measure your baseline humidity. Install a hygrometer ($15–30 at any hardware store) in the main living area. Run the AC normally and track indoor relative humidity over a week. If it's consistently above 60%, you have a humidity management issue that needs to be on your action list.

Walk the home for moisture evidence. Before moving furniture in, inspect for: water staining on ceilings (active or past roof leaks), discoloration around windows (condensation issues), musty odors in closets or under sinks, and any visible mold growth on surfaces. These are the visible indicators of moisture problems that affect air quality.

Run the HVAC and stand near a supply register. When the system first starts after a period of off, note any musty odor. This is one of the earliest sensory indicators of HVAC mold.

Weeks 2–4: Initial Actions

Schedule professional HVAC assessment and decontamination. If the maintenance history is unknown or more than 2 years old — the standard for Florida's climate — schedule a professional service that includes coil inspection, decontamination if warranted, condensate system service, and air quality testing before and after. This establishes your documented baseline and addresses any accumulated contamination from previous ownership.

Clear and treat the condensate drain line. Pour a cup of dilute bleach (50:50 with water) down the condensate drain access port to clear any algae and establish clean drainage before summer.

Replace the air filter with a quality MERV 11 or MERV 13 filter appropriate for your system. Document the replacement date and set a calendar reminder for 60–90 days out.

Address any visible moisture issues found in Week 1. Surface mold in bathrooms should be cleaned and the moisture source controlled. Water staining indicating active leaks should be assessed by a contractor.

Month 2: Ventilation and Humidity Management

Evaluate HVAC sizing. If indoor humidity is consistently above 60% despite AC operation, research whether your system was properly sized for the home. This often requires a contractor who will perform a Manual J calculation — if the previous contractor oversized the system, this explains chronic humidity problems. A whole-home dehumidifier may be the practical solution.

Establish ventilation habits. Identify when Florida weather allows comfortable window ventilation — typically October through March during mild days. Plan to ventilate the home during these windows to flush indoor VOCs and reduce CO₂ accumulation.

Month 3: Documentation and Planning

Get air quality measurement results documented. If your HVAC decontamination included before-and-after testing, review the results. If not, commission a standalone indoor air quality test now that the home has been occupied and any surface treatments have had time to off-gas.

Establish your maintenance schedule. In Florida's climate, appropriate ongoing maintenance includes: filter replacement every 1–3 months; drain line treatment every 3 months; professional coil service every 12–18 months. Set calendar reminders.

Review for specific household needs. If anyone in the household has asthma, allergies, COPD, or other respiratory conditions, or if there are young children or elderly family members, consider HEPA air purification in key rooms (bedrooms, primary living space) as supplemental protection on top of the HVAC-based foundation.

Respira Florida helps new Florida homeowners establish clean indoor air baselines — with professional HVAC decontamination and documented results from your first service. We're accepting founding clients for our 2026 Orlando launch.

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