It is suitable for vent and exhaust ductwork, return ductwork, cooling fan duct, heating and air conditioning (AC) duct for HVAC services.ĭespite the robust calculations being performed, this calculator is suitable for use by anyone involved with HVAC services. The maximum air flow rate which can pass through a specified duct size can also be computed. Through the use of hydraulic diameter, it works as an oval duct and round duct as well as rectangular duct sizer for HVAC services.
#Hvac duct sizing calculations professional
It calculates the friction factor based on the preferred methods of Trane, Carrier, ASHRAE and professional mechanical engineering consultants - by iteratively solving the Colebrook equation for the friction factor based on air flow rate. It works for air conditioner (AC) supply duct as well as heating and cooling fan duct, mechanical ventilation, exhaust duct and return duct for all HVAC services applications.įor its calculations, Rapid HVAC Duct Sizing uses a hybrid of the equal friction loss method and constant velocity methods, selecting for an equal friction loss (pressure drop) with a set maximum velocity to avoid acoustic issues. A flexible duct option (in addition to sheet metal duct) is also available which uses a higher roughness coefficient, to allow flexible duct specification using the app as well. Just like a ductulator, Rapid HVAC Duct Sizing supports sizing of oval duct and round duct as well as the standard rectangular duct most often used in HVAC services.
#Hvac duct sizing calculations plus
It is customisable, with both SI (metric) and imperial units supported plus the target velocity and pressure drop are able to be configured. You don't need mechanical engineering consultant skills to use it - Rapid HVAC Duct Sizing comes with industry default values preloaded so all you need to do is plug in the air flow rate and spin the wheel to set one dimension. It is a quick, simple, easy to use tool allowing you to whip out your phone and give an immediate answer, just like a ductulator.
Throw away your ductulator and get into the 21st century! Rapid HVAC (Heating, Ventilation and Air Conditioning) Duct Sizing takes the trouble out of air conditioning duct and exhaust duct sizing.
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