CALCULATION GUIDES
Understand the inputs, method and limits
Each guide explains the calculator purpose, required inputs, result interpretation and checks required before use.
Hydraulic separator and heating manifold
Preliminary sizing of a hydraulic separator, heating manifold, primary and secondary flow rates, pipe connections and main dimensions.
Read the guideExpansion vessel for heating and chilled water
Estimate the minimum expansion vessel capacity, expansion volume, operating pressures and a standard vessel size.
Read the guideHeating water flow rate and pipe diameter
Calculate heating water flow rate, theoretical diameter, suggested pipe size and actual velocity.
Read the guideCircular and rectangular duct sizing
Calculate a circular duct diameter, an equivalent rectangular size and an indicative insulation surface.
Read the guideAirflow in circular and rectangular ducts
Calculate airflow from duct dimensions and air velocity, and compare circular and rectangular sections.
Read the guideAir duct pressure loss
Calculate pressure losses by duct section, including linear, fixed and fitting losses.
Read the guide