TOOL INDEX
Florida HVAC tools
DIY calculators and checklists for homeowners and techs. Not a contractor shop.
AC tonnage calculatorOne calculator: instant rule-of-thumb tonnage, then refine for your house with city design weather, windows, attic, and ducts, math shown. Not Manual J.
SEER2 savings calculatorCooling kWh only, with FPL / OUC / Duke planning rates you can edit.
AC maintenance checklistFilter, drain, fan Auto, storm shutoff. Monthly stuff you can do.
R-22 vs R-410A vs R-32 vs R-454BNameplate reading and why you cannot just top off across types.
Repair vs replaceENERGY STAR cues and the unofficial age × quote gut check.
AC freezing in FloridaThaw list plus dirty-filter and high-MERV airflow checks. Humidity is the fuel; airflow or charge is the trigger.
Air filter size finderLook up filter size by air handler / furnace model from manufacturer IOM sheets. Honest miss → measure. Florida 1″ MERV caution.
Outdoor coil & condenser clearanceFlorida yard growth checklist. Clear plants, keep clearance, gentle rinse. Stop at refrigerant and electrical.
Thermostat near a supply ventFlorida placement checklist. Supply blast, sun, kitchen heat, height. Why short cycles leave homes clammy.
AC short cycling in Florida humidityWhy brief on-and-off runs leave homes clammy. Filter, returns, thermostat place. When to stop DIY.
AC runs constantly in Florida humidityLong runtime vs won't shut off. Fan AUTO, filter, outdoor clearance. When to stop DIY.
House humid with the AC running in FloridaRH checker plus an 8-step fix in order: fan AUTO, full cycles, airflow, moisture, attic return leaks, then dehumidifier.
Heat smells like burning in FloridaSmell finder, which-smell table, AUX vs EM heat, and a safe first cold night plan. Thermostat and breaker only.
Heat pump steaming in FloridaDefrost finder and timer, steam vs ice table, AUX heat, and a cold morning checklist. Look only, never chip ice.
What temperature to set your AC in FloridaHome, away, and fan settings, a per-degree savings planner, and how to keep a closed-up house dry.
How to protect your AC from a hurricane in FloridaStorm-stage checklist: clear debris, pre-cool, thermostat and breaker off, inspect before restart.
Whole-home dehumidifier pintsPlanning bands in current labels. Not a substitute for right-sized AC.
What size AC for 2,000 sq ft?Rule of thumb says about 3.5 tons; house-specific results often land lower. It depends on the house.
3 ton vs 3.5 tonBetween sizes, the smaller one often dries better after Manual J.
Common questions
What tools are on tonnagecalc.com?
An AC tonnage calculator, SEER2 savings calculator, maintenance checklist, refrigerant guide, repair vs replace helper, freeze and airflow checklists, an air filter size finder, and a whole-home dehumidifier pint planner.
Is the tonnage calculator a Manual J?
No. It gives a Florida-adjusted ballpark from square footage, sun, and insulation. It is not Manual J.
What does the SEER2 calculator include?
Cooling kWh only, with FPL, OUC, and Duke FL planning rates you can edit.
Is this a contractor shop?
No. These are DIY calculators and checklists for homeowners and techs, not a contractor shop.