# HVAC Calculator

The program allows performing various calculations for HVAC systems engineering.

The program is a complex with unique dimension and content comprizing **70 calculations** critical both for professional and entry-level HVAC engineer.

**System requirements:**

- Browser support Chrome, Opera, Firefox, Edge, Safari, Internet Explorer 10+.

- Get the most up-to-date version of the program.
- Use the program at any PC at any time.
- Carry out single and complex calculations thanks to vast range of calculations.
- Do the quick calculation selection by means of navigation at calculations sections.
- Use the memorizing tools for quick save and calculation results applying.
- Browse the formulas used in calculations.
- Use suitable system of units: imperial or metric.
- Use the math calculator for additional calculations.

Function |

Aerodynamics |

Air velocity in terms of diameter |

Air velocity in terms of dimensions |

Air velocity in terms of area |

Air flow in terms of diameter |

Air flow in terms of dimensions |

Air flow in terms of area |

Mass air flow rate |

Volume air flow rate |

Selection of the duct diameter |

Selection of the rectangular duct dimensions |

Friction pressure drop in the circular duct |

Friction pressure drop in the rectangular duct |

Pressure drop in terms of local losses |

Circular orifice diameter |

Circular orifice dimensions |

Hydraulics |

Fluid velocity |

Fluid flow in terms of diameter |

Fluid flow in terms of capacity |

Capacity in terms of diameter |

Capacity in terms of fluid flow |

Selection of the pipeline diameter in terms of flow |

Selection of the pipeline diameter in terms of capacity |

Pipeline frictional pressure drop |

Pressure drop in terms of local losses |

Throttling orifice diameter |

Valve Kv |

Valve pressure drop |

System volume change |

Pipeline thermal extension |

Heating |

Internal face temperature of the guarding |

Single material guarding heat transmission resistance |

Two materials guarding heat transmission resistance |

Ventilation |

Capacity for air heating |

Air cooling capacity by coil temperature |

Air cooling capacity by relative humidity |

Air cooling capacity by enthalpy |

Fan electric motor capacity |

Available pressure for natural ventilation |

Air flow in terms of heat emission |

Air flow in terms of humidity exudation |

Water flow for air steam humidification |

Capacity for air steam humidification |

Air properties |

Moisture content in the air in terms of enthalpy |

Moisture content in the air in terms of relative humidity |

Air enthalpy in terms of moisture content |

Air enthalpy in terms of relative humidity |

Air relative humidity in terms of moisture content |

Air relative humidity in terms of enthalpy |

Air mixture temperature |

Air mixture moisture content |

Air mixture enthalpy |

Air mixture relative humidity |

Air density |

Air specific heat |

Steam saturation pressure in terms of temperature |

Steam saturation pressure in terms of moisture content |

Barometric pressure |

Partial pressure |

Dewpoint temperature |

Wet bulb temperature by relative humidity |

Wet bulb temperature by enthalpy |

Water properties |

Water density |

Water specific heat |

Water kinematic viscosity |

Engineering geometry |

Steel pipeline weight |

Surface area of the circular section insulation |

Surface area of the rectangular section insulation |

Surface area of the circular duct |

Surface area of the rectangular duct |

Equivalent diameter |