HVAC Calculators

Ventilation for Contaminant Removal Calculator

Calculate the airflow required to remove excess heat, moisture, and airborne contaminants.

Supply Air Heater Calculator

Determine the heating capacity required for supply air from airflow and temperature difference.

Humidifier and Dehumidifier Calculator

Determine the humidification or dehumidification capacity required to reach the target humidity.

Indoor Pool Ventilation Calculator

Estimate evaporation, outdoor and recirculated air, dehumidifier capacity, heating and condensation risk.

Air Stream Mixing Calculator

Calculate mixed-air temperature and humidity and assess the risk of condensation.

Moist Air Properties Calculator

Calculate the main thermophysical properties of moist air.

Fan Power Calculator

Calculate fan shaft and motor power from airflow, pressure rise, and efficiency.

Control Valve Kv Calculator

Determine the required valve flow coefficient from flow rate, density, and pressure drop.

Pump Power Calculator

Calculate hydraulic, shaft, and motor power for a pump.

Chiller Buffer Tank Calculator

Determine the minimum buffer tank volume needed to prevent excessive chiller cycling.

Cooling Time Calculator

Estimate cooling time from the thermal properties, load, and operating conditions.

Pipe Freezing Time Calculator

Estimate the time required for water in a pipe to freeze under specified conditions.

Dry Air Properties Calculator

Calculate the main thermophysical properties of dry air by temperature and pressure.

Air Duct Calculator

Select duct dimensions and calculate air velocity from the airflow rate.

Ethylene Glycol Properties Calculator

Calculate the thermophysical properties of an ethylene glycol solution.

Propylene Glycol Properties Calculator

Calculate the thermophysical properties of a propylene glycol solution.

Geometry Calculator

Calculate areas, volumes, and other geometric parameters of common shapes.

Thermal Storage Tank Calculator

Determine the required thermal storage volume from heat load and temperature range.

Pipe Pressure Loss Calculator

Calculate friction and local pressure losses in a pipeline.

Pipe Thermal Expansion Calculator

Calculate pipe elongation and thermal movement caused by a temperature change.

Polynomial Interpolation Calculator

Build an interpolation polynomial and calculate intermediate values from tabulated data.

Thermal Insulation Calculator

Estimate heat loss and the required insulation thickness for pipes and surfaces.

Engineering Unit Converter

Convert common engineering units used in HVAC calculations.

Water Flow Rate Calculator

Calculate water flow rate from thermal load and temperature difference.

Water Properties Calculator

Calculate the main thermophysical properties of water by temperature.

Water Thermal Expansion Calculator

Calculate water volume expansion caused by heating.