❄️ HVAC
Free hvac calculators and tools.
Air Conditioner BTU Calculator
Calculate the BTUs needed to cool any room. Enter room dimensions and get the right AC size in BTUs
AC Tonnage Calculator
Calculate the right AC tonnage for your home. Enter square footage, climate zone, and insulation to
Furnace Size Calculator
Calculate the correct furnace size in BTU and tonnage for your home. Enter square footage, ceiling h
Heat Loss Calculator
Calculate heat loss in BTU/hr through walls, windows, and ceilings. Enter area, R-value, and tempera
HVAC Load Calculator
Calculate heating and cooling loads for your home or building. Enter square footage, climate, window
Duct Size Calculator
Calculate proper duct diameter or dimensions for HVAC systems. Enter CFM airflow and velocity to get
CFM Calculator
Calculate required CFM (cubic feet per minute) for room ventilation and HVAC sizing. Enter room dime
Air Changes Per Hour Calculator
Calculate air changes per hour (ACH) from CFM and room volume. Determine if your ventilation meets c
Boiler Size Calculator
Calculate the correct boiler size for your home's hydronic heating system. Enter floor area, heat lo
HVAC Cost Calculator
Estimate the cost to install or replace an HVAC system. Enter system size, type, efficiency, and duc
Heat Pump Size Calculator
Calculate the correct heat pump size for your home. Enter floor area, climate region, and insulation
Window AC Size Calculator
Calculate the correct BTU size for a window air conditioner. Enter room size, ceiling height, sun ex
Mini Split Size Calculator
Calculate the correct mini split size per zone and total outdoor unit capacity. Enter zone area, num
HVAC Ductwork Cost Calculator
Estimate HVAC ductwork installation costs by home size, duct type, and complexity. Get accurate pric
Refrigerant Line Charge Calculator
Calculate refrigerant charge needed for HVAC line sets. Get ounces per foot and total charge by line
HVAC Replacement Cost Calculator
Estimate HVAC replacement costs by home size, system type, and efficiency. Get price ranges for cent
Radiant Floor Heating Calculator
Calculate radiant floor heating requirements. Get wattage, circuit size, and installation costs for
Humidifier Size Calculator
Calculate the right humidifier size for your home. Get daily gallon requirements and humidifier type
Dehumidifier Size Calculator
Calculate the right dehumidifier size for your space. Get pints-per-day capacity and size recommenda