Everyday calculations.
Clear engineering decisions.
HVAC Studio brings 12 engineering calculators into one browser workspace. It helps HVAC and M&E engineers estimate demand, compare system sizes and check equipment duty during preliminary design and everyday reviews.
Explore the calculators →Loads & flows
Estimate sensible and latent cooling loads, compare AC capacity and convert cooling duty into design air or water flow.
Air systems
Determine ventilation flow, compare round and rectangular ducts, size grilles and calculate fan pressure and power along a critical path.
Water systems
Compare pipe sizes, calculate pump head for closed or open systems and estimate diaphragm expansion-vessel capacity.
Detailed checks
Inspect individual fitting losses using K and its reference section, check insulation against dew point and explore moist-air states and mixing.
Results that connect
Transfer cooling load to flow calculations and flow to pipe sizing. Add individual fittings to a fan or pump path; path inputs are retained in the current tab session. Supported calculators provide report preview and browser printing to PDF.
Methods and scope are visible
Each tool states its formulas, assumptions and operating limits. Cooling load is a preliminary estimate, not an hourly building simulation. K depends on actual geometry and its reference velocity; illustrated fitting shapes do not automatically select a coefficient. Equipment selection still requires manufacturer performance data.
Built for everyday use
Free to use on desktop and mobile, in English and Vietnamese, without an account. Calculations run in the browser. Default values are examples: adjust materials, temperatures and design limits for your project.
Help improve the tools
Send feedback or a calculation case that needs review to [email protected].
Hưng Trần · Creator and developer