Understand the inputs. Check the choices.
HVAC Studio is an online calculation toolkit for air conditioning, ventilation and piping systems. We focus on everyday engineering calculations that support option selection and design checks.
Choose a tool for your task →Cooling load & AC
Estimate sensible and latent loads, compare AC capacities and export a PDF report.
Open tool →Duct sizing
Size round or rectangular ducts by velocity and friction. Compare up to 30 suitable sizes.
Open tool →Pipe sizing
Size chiller and water supply pipes or gravity drains. Check velocity and pressure loss.
Open tool →Psychrometric chart
Calculate air properties, explore an interactive chart and evaluate air mixing.
Open tool →Clear inputs and transparent methods
Air ducts and pressurized water pipes use Darcy–Weisbach with the Colebrook friction factor. The psychrometric tool calculates moist air properties from pressure and a pair of state inputs. Cooling load separates sensible and latent loads before checking proposed AC capacity.
Apply results within their scope
Cooling load is a preliminary component estimate, not an hourly simulation or HB/RTS calculation. Duct and pressurized pipe calculations cover straight-run friction; add fitting and equipment losses separately. Gravity drainage uses Manning. Air mixing does not model condensation.
Accessible for everyday work
Free to use on desktop and mobile, in Vietnamese and English. Calculations run in the browser without an account. Default values are starting points; adapt them to the project materials, operating conditions and design requirements.