Free planning tools from Hales AC
HVAC Calculators
Six planning calculators built for Pinellas County homes — sizing, running cost, airflow, moisture, lifespan, and heat-pump savings. Every calculator answers with a planning default for a typical local home before you touch a field, and none of them asks for your information to show a number.
Sizing
AC Size Calculator
Estimate AC size in BTU/h and tons from the home itself — square footage, ceilings, insulation, sun, and occupants.
Open the calculator →Duct CFM Calculator
Total supply airflow from tons and CFM per ton, plus any room's proportional share by floor area.
Open the calculator →Dehumidifier Size Calculator
Match a whole-house dehumidifier to your home's size and dampness — in pints per day, using the classes from our Florida dehumidifier guide.
Open the calculator →Cost & savings
AC Operating Cost Calculator
Estimate a month of cooling electricity and cost from tons, SEER2, and equivalent full-load hours — priced at your own rate.
Open the calculator →Heat Pump Savings Calculator
Estimate the electricity a new heat pump could save over your current system — cooling, plus Tampa Bay's light heating.
Open the calculator →Planning tools, not diagnoses
These calculators are planning tools. They use the same ranges this site publishes, but none of them replaces on-site measurement: a Manual J load calculation for sizing, measured static pressure and delivered airflow for ducts, a moisture assessment for dehumidification, and an in-person evaluation before you repair or replace any system.