Engineering Calculator HVAC

Professional engineering unit converter with built-in HVAC calculators. UNIT CONVERTER — 10 categories: • Pressure (bar, psi, atm, kPa, mmHg, Pa) • Flow Rate (m³/h, l/s, GPM, CFM) • Power (kW, HP, BTU/h, kcal/h, W) • Energy (kWh, MJ, BTU, Gcal, kcal) • Temperature (°C, °F, K) • Length, Area, Volume, Mass, Velocity HVAC ENGINEERING TOOLS — 5 calculators: • Pipe Flow Velocity — calculate water/air speed in pipes • Thermal Power — heating/cooling load from flow and temperature • Valve Pressure Drop — Kv/Cv coefficient calculations • Expansion Tank Sizing — vessel volume for heating systems • Insulation Area — surface area for pipe/duct insulation FEATURES: • Instant real-time conversion • All conversions table view • Bilingual interface (English / Russian) • Clean Material Design interface • Works completely offline • No ads, no in-app purchases Perfect for HVAC engineers, plumbers, mechanical engineers, energy auditors, building services professionals, and engineering students.