# HVAC Calculator

The program allows performing various calculations for HVAC systems engineering.

The program is a complex, unique by its size and content, comprising 70 calculations, vital for any HVAC engineer.

Now all the most up-to-date calculations are readily available for you, perform calculations anywhere: at a construction site, in negotiating, in a transport, office, auditorium etc.

Pro version contains **70** types of calculations, whereas Lite has got **30**.

You can select **Imperial or Metric** units in the program.

**System requirements:**

- Android 4.1 or later.
- Minimum display resolution 480x320 pixel.

**License:**

- Paid - Pro version, contains full set of functions.
- Free - Lite version, contains limited set of functions.

- Use the program at any place.
- 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.
- Mark the calculations as Favorite.
- Use suitable system of units: imperial or metric.
- Use the math calculator for additional calculations.

Function | Lite | Pro |

Aerodynamics | ||

Mass air flow rate | – | ● |

Volume air flow rate | – | ● |

Selection of the duct diameter | – | ● |

Selection of the rectangular duct dimensions | – | ● |

Circular orifice diameter | – | ● |

Circular orifice dimensions | – | ● |

Air velocity in terms of area | – | ● |

Air flow in terms of area | – | ● |

Air velocity in terms of diameter | ● | ● |

Air velocity in terms of dimensions | ● | ● |

Air flow in terms of diameter | ● | ● |

Air flow in terms of dimensions | ● | ● |

Friction pressure drop in the circular duct | ● | ● |

Friction pressure drop in the rectangular duct | ● | ● |

Pressure drop in terms of local losses | ● | ● |

Hydraulics | ||

Fluid flow in terms of capacity | – | ● |

Capacity in terms of fluid flow | – | ● |

Selection of the pipeline diameter in terms of flow | – | ● |

Selection of the pipeline diameter in terms of capacity | – | ● |

Throttling orifice diameter | – | ● |

Valve Kv | – | ● |

System volume change | – | ● |

Pipeline thermal extension | – | ● |

Fluid velocity | ● | ● |

Fluid flow in terms of diameter | ● | ● |

Capacity in terms of diameter | ● | ● |

Pipeline frictional pressure drop | ● | ● |

Pressure drop in terms of local losses | ● | ● |

Valve pressure drop | ● | ● |

Heating | ||

Two materials guarding heat transmission resistance | – | ● |

Single material guarding heat transmission resistance | ● | ● |

Internal face temperature of the guarding | ● | ● |

Ventilation | ||

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 | – | ● |

Water flow for air steam humidification | – | ● |

Capacity for air steam humidification | – | ● |

Capacity for air heating | ● | ● |

Air flow in terms of heat emission | ● | ● |

Air flow in terms of humidity exudation | ● | ● |

Air properties | ||

Air mixture temperature | – | ● |

Air mixture moisture content | – | ● |

Air mixture enthalpy | – | ● |

Air mixture relative humidity | – | ● |

Steam saturation pressure in terms of temperature | – | ● |

Steam saturation pressure in terms of moisture content | – | ● |

Barometric pressure | – | ● |

Partial pressure | – | ● |

Dewpoint temperature | – | ● |

Air density | – | ● |

Air specific heat | – | ● |

Wet bulb temperature by relative humidity | – | ● |

Wet bulb temperature by enthalpy | – | ● |

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 | ● | ● |

Water properties | ||

Water density | ● | ● |

Water specific heat | ● | ● |

Water kinematic viscosity | ● | ● |

Engineering geometry | ||

Surface area of the circular section insulation | – | ● |

Surface area of the rectangular section insulation | – | ● |

Equivalent diameter | – | ● |

Steel pipeline weight | ● | ● |

Surface area of the circular duct | ● | ● |

Surface area of the rectangular duct | ● | ● |