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Calculations & Conversions at your finger tips.Momentous HVAC Calculators, Comprehensive Unit Converter with 2900+ Units, 50000+ Conversions, Scientific Evaluator, Property Tables, and more…Calculations & Conversions at your finger tips.Momentous HVAC Calculators, Comprehensive Unit Converter with 2900+ Units, 50000+ Conversions, Scientific Evaluator, Property Tables, and more…ComfortAir HVAC software is designed to be used by engineers, architects, contractors and energy auditors for calculating and analysing heating and air conditioning hourly loads in all types of buildings. Units can be set to English or Metric.Momentous HVAC Calculator.Scientific Evaluator-Superlative collection of Operators and instant reference to recent calculations.Memory functions etc.A must have for Engineers.Humidity Ratio,Moist Air Density,Water Vapor Density and more..Momentous HVAC Calculator.Scientific Evaluator-Superlative collection of Operators and instant reference to recent calculations.Memory functions etc.A must have for Engineers.Humidity Ratio,Moist Air Density,Water Vapor Density and more..Design Master HVAC is an integrated HVAC building design and drafting program for AutoCAD. Features include 2D and 3D ductwork drafting, ductwork sizing, pressure drop calculations, and building load calculations.An interactive and intelligent psychrometric chart program for HVAC industry. It provides the most accurate and reliable data based on Hyland and Wexler's reports published by ASHRAE, which treat air and vapor as real gases, rather than ideal gases.Sheet metal for AutoCAD. It calculates flat (unfolded) sheet development of ducts, rectangle to ound transitions, cylinders, cones, intersections, connections, bifurcations, elbows, etc. For HVAC, hoppers, cyclones, ducts, silos, piping, etc.