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After a tropical storm or hurricane near-miss, the wet zone—not the whole floor plan—drives dehumidifier size. Florida outdoor air often sits well above living-space targets, so opening windows rarely dries materials. Size for the affected rooms, bias upward for open plans and leaky envelopes, then verify with a hygrometer and moisture meter.
This page is educational sizing plus product picks based on specs and common Florida use cases. It is not a flood-restoration manual, not a mold-cure guide, and not medical advice. Standing water, sewage, or structural damage require licensed pros.
Related: hurricane season moisture, post-storm dry-out. Year-round baseline: dehumidifier pint chart. Meter help: drywall after a leak.
Post-storm sizing chart (practical)
| Wet-zone situation | Practical capacity class | Notes |
|---|---|---|
| One closed bedroom / bath splash | 30–50 pints/day | Continuous drain still preferred |
| Condo wing or 1–2 rooms (~under 800 sq ft affected) | 50 pints/day class | Seal drying zone from outdoor air |
| Mid home open plan / several wet rooms (~1,000–1,800 sq ft) | 70 pints/day class | FloridaDamp default post-storm recommend |
| Large / older / leaky envelope / garage-adjacent wet zone | 70–90+ pints/day or multiple units | Or call pros for commercial LGR gear |
| Carpet + lower drywall across multiple rooms | 70+ with air movers | Fans alone are not enough |
| Crawl or sealed under-house moisture | Purpose-built crawl unit | See portable vs crawl space |
Reading tip: Square-foot claims on retail boxes assume milder moisture. After storms, treat them as optimistic and size by wet-zone load.
Four sizing steps
- Define the wet zone with a moisture meter—not the whole address.
- Pick the chart row, then bias up for Florida infiltration, frequent door openings, or weak AC dehumidification after outages.
- Require continuous drain (hose and/or pump) for multi-day runtimes.
- Verify air relative humidity (RH) with a hygrometer and material readings until they approach dry references.
Living-space target when practical: 45–55% relative humidity (RH), keep sustained levels under 60%. Air can look better before drywall cores finish drying—keep the meter in the loop.
When a portable is enough vs when to call pros
Portable-machine territory: limited wet drywall, carpet edges, or short intrusion after extraction; power is stable; no sewage.
Call professionals: inches of water, roof openings you cannot stabilize, Category contamination, electrical hazards, or readings that will not trend toward dry references after deliberate drying. Pros may deploy higher-capacity LGR equipment beyond retail portables.
Want USA-built? Storm premium path:
Delmhorst /
Wagner Orion 950 meters,
Tempo Disc /
SensorPush HT.w,
Dri-Eaz Revolution /
Phoenix DryMAX XL,
Velo Pro,
PumpSpy condensate. Value consumer portables below are overseas-made — no Made in America badge.
Product picks by post-storm size class
Good — 30–40 pint class (single room / small condo zone)
Better — 50 pint class (most limited wet zones)
Slot open for Marketing — prefer Good (Midea Cube B09155CW3S) or Best (Keystone B01CILF1JI) until a verified mid-capacity portable ASIN is confirmed. Still no USA consumer 30–70 pint portable.
Best — 70 pint class (open plans / heavier post-storm load)
FloridaDamp’s default recommend when several rooms or an open plan took rain.
Add-on — Moisture meter (map the wet zone first)
Add-on — Air mover (pair with the dehumidifier)
Add-on — Hygrometer 2-pack
Add-on — Condensate pump / drain insurance
Drain, power, and placement tips
- Run to a sink, tub, or approved drain—overnight bucket duty fails after storms.
- Prefer auto-restart after rolling outages.
- Place the unit in the wet zone with clear airflow; do not bury it behind plastic sheeting without a planned drying chamber.
- Pair with air movers from the post-storm dry-out.
- Surge-protect restored circuits when practical.
- Generator loads: compressors surge—size carefully and keep combustion generators outdoors only.
Link the size choice to the rest of the site
- Season packing: hurricane season moisture
- Trio buy page: post-storm dry-out
- Everyday capacity: pint chart
- AC still running? AC vs dehumidifier
- Condo drain constraints: condo guide
- Hot attached garage: garage guide
- Salt air maintenance: coastal guide
Bottom line
After a Florida storm, size the dehumidifier to the wet zone, not the listing square footage. Most multi-room rain intrusions land in the 70-pint continuous-drain class; smaller sealed zones can use 50-pint gear. Buy the meter and air mover with the dehumidifier, close out outdoor humidity while you dry, and call pros when the loss outgrows a retail portable.